Title of Invention	A NOVEL MICROPOROUS CRYSTALLINE SILICOALUMINO/(METALLO) ALUMINOPHOSPHATE MOLECILAR SIEVE AND METHOD OF SYNTHESIS THEREOF
Abstract	The present invention disclosed a novel microporous crystalline silicoalumino/(metallo) aluminophosphate molecular sieve framework (designated as BPC-1), having in its as-synthesized form, an X-ray diffraction pattern including the lines listed in table 1, and method of its synthesis using 4-dimethylaminopyridine as organic templating agent in fluoride medium under microwave-hydrothermal conditions.

Title of Invention

A NOVEL MICROPOROUS CRYSTALLINE SILICOALUMINO/(METALLO) ALUMINOPHOSPHATE MOLECILAR SIEVE AND METHOD OF SYNTHESIS THEREOF

Abstract

The present invention disclosed a novel microporous crystalline silicoalumino/(metallo) aluminophosphate molecular sieve framework (designated as BPC-1), having in its as-synthesized form, an X-ray diffraction pattern including the lines listed in table 1, and method of its synthesis using 4-dimethylaminopyridine as organic templating agent in fluoride medium under microwave-hydrothermal conditions.

Full Text	FORM 2 THE PATENTS ACT, 1970 (39 of 1970) The Patent Rules, 2003 PROVISIONAL SPECIFICATION (See section 10 and rule 13) TITLE OF THE INVENTION "NOVEL ALUMINOPHOSPHATE MOLECULAR SIEVE: BPC-1, ITS SYNTHESIS AND USE" We, BHARAT PETROLEUM CORPORATION LIMITED, of Bharat Bhawan, 4 8B 6 Currimbhoy Road, Ballard Estate, Mumbai - 400001, India; The following specification describes the invention: FIELD OF INVENTION The present invention relates to a novel microporous aluminophosphate framework, or a substituted derivative thereof, to a method of its synthesis in fluoride medium under microwave-hydrothermal conditions. BACKGROUND OF INVENTION Crystalline molecular sieves have a 3-dimensional, microporous frameworks having tetrahedrally coordinated cation [TO4]. Generally, frameworks comprising oxygen tetrahedra of aluminium and silicon cations leads to the formation of microporous aluminosilicate framework commonly known as zeolites. On the other hand, 3-dimensional microporous aluminophosphate (AlPOs) frameworks classified as zeo-type molecular sieves are composed of oxygen tetrahedra of Al and P cations whereas silicoaluminophosphate (SAPOs) type molecular sieves composed of oxygen tetrahedra of Si, Al and P cations. Molecular sieves are typically described in terms of the size of pore window which is based on the number of T atoms present in the pore window. Typically they are classified as small, medium and large pore molecular sieves based on their pore opening. The small pore molecular sieves have pore size in between 0.4-0.5 nm. Medium pore molecular sieves have pore size in between 0.5-0.6 nm whereas large pore molecular sieves have pore opening of 0.6-0.8 nm (See R. Szostak, Molecular Sieves: Principles of synthesis and Identification, 2nd edition, Blackie Academic and Professional, London, 1998). Wide spread application of crystalline molecular sieves in the field of petroleum processing, petrochemical, fine chemical has led to sustained research effort, both in industry and academia, for their discovery. This has resulted into synthesis of new frameworks such as ITQ-13 (Corma, et.al., Angew. Chem. Int. Ed. 42, 1156-1159 (2003)), ITQ-12 (Barrett et.al. Chem. Commun. (2003)), SSZ-53, -59 (Burton et.al. Chemistry: a Eur. Journal 9, 5737-5748 (2003), Chemistry: a Eur. Journal 9, 5737-5748 (2003)) in recent times. Molecular sieves are usually synthesized under hydrothermal conditions from a reactive gel comprising of aluminum, silica and/or phosphorous sources in the presence of an organic structure directing agent, such as an organic nitrogen compound in the temperature range of 100-200 °C. Commonly used nitrogen compounds are amines, diamines and quaternary ammonium salts. Such syntheses also carried out under solvothermal conditions employing nonaqueous solvents such as glycols. The use of mineralizing agents is also practiced in molecular sieve synthesis. For example, EP-A-337,479 discloses the use of hydrogen fluoride in water at low pH to mineralize silica in glass for the synthesis of ZSM-5. The use of fluoride medium is also depicted in US pat.6,793,901 for synthesis of aluminophosphate or 2 silicoaluminophosphate molecular sieves having the CHA framework. The use of fluoride media is also reported to lead to the formation of large zeolite crystals (see Berger et.al. Microporous and Mesoporous Materials 83, (1-3) , 2005, 333-344). Some of the zeolites cited above have been synthesized in a fluoride medium in which the mobilizing agent is not the usual hydroxide ion but a fluoride ion in accordance with a process initially in U.S. Pat. No. 4,073,865. One advantage of such fluorine-containing reaction systems is to allow the production of purely siliceous zeolites containing fewer defects than zeolites obtained in a traditional OH" medium (J M Chezeau et al, Zeolites 1991, 11, 598). A further decisive advantage of using fluorine-containing reaction media is to allow the production of novel framework topologies containing double cycles of four tetrahedra, as is the case with ITQ-7, ITQ-13 and ITQ-17 zeolites. Recently, the use of fluoride medium has led to crystallization of novel large pore aluminophosphate based molecular sieve of AFO type (Morris et al. Chem. Mater. 2004, 16, 2844). More recently, the crystallization of EMM-8 phase (US Pat. Appl. No. 2006/0074267) has been disclosed from fluoride free medium. Such framework has been claimed to be isostructural to AFO type framework on calcination. The crystalline molecular sieve composition, BPC-1, disclosed in the present invention exhibits unique X-ray diffraction pattern with four peaks in the range of 2 theta 5-10 ° and differs with that of EMM-8. Thus its structural framework is primarily different than that of EMM-8. In general crystallization of molecular sieves is performed under hydrothermal conditions in the temperature range of 100-200 °C which usually requires prolonged crystallization time for phase formation. This sometimes leads to the formation of thermodynamically stable dense phases such as tridymite, cristobalite, berlinite, quartz as impure phases. This is due to the metastable nature of zeolitic framework under crystallization conditions. Furthermore, conventional hydrothermal approach is often found to be energy intensive. The microwave-assisted synthesis of molecular sieves is a relatively new area of research (Komarneni, et.al. Mater. Res. Bull. 1992, 27, 1393; Ionics 1995, 21, 95). It offers many distinct advantages over conventional synthesis. They include rapid heating to crystallization temperature due to volumetric heating, resulting in homogeneous nucleation, fast supersaturation by the rapid dissolution of precipitated gels and eventually a shorter crystallization time compared to conventional autoclave heating. It is also energy efficient and economical. 3 This method has been successfully applied for the synthesis of several types of zeolites namely zeolite A, Y, ZSM-5, MCM- 41, metal substituted aluminophosphate and gallophosphate. It has also been successfully applied for the synthesis of mesostructured thiogermanates / germanium sulfides. A rapid synthesis of titanium substituted MCM-41 molecular sieve has also been reported using microwave assisted approach. Recently, a rapid synthesis of SBA-15 and Ti-, and Zr-SBA-15 framework under microwave-hydrothermal conditions has been reported (Cundy, C. S. Coll. Czech. Chem. Commun. 1998, 63, 1699, Oberender et.al. Mat. Res. Symp. Proc. 1999, 547, 433. Kang, et.al. Catal. Lett. 1999, 59, 45. Newalkar, et.al. Chem. Commun. 2000, 2389, Chem. Mater. 2001, 13, 552). The use of microwave-hydrothermal conditions in our research has led to the invention of novel microporous aluminophosphate framework designated as BPC-1 in the presence of fluoride ions. The crystallized framework also appears to be isostructural to AFO type framework upon calcination. SUMMARY OF THE INVENTION The present invention provides novel microporous crystalline aluminophosphates ("ALPO's), aluminosilicophosphates ("APSO's") metalloaluminophosphates ("MAPO's") and metalloaiuminosilicophosphates ("MAPSO's") denominated BPC-1 and the methods for its preparation. BPC-1 has an essential framework structure whose chemical composition, expressed in terms of mole ratios is: A1203:1.0.+-.0.2P2O5:xSiO2:yMeO:zF:mR where x has a value of 0 to 0.15 and y has a value of 0 to 0.5, z has a value of 0 to 0.80, m has a value of 0.3 to 5 and Me represents at least one element, other than aluminum, phosphorus or silicon, which is capable of forming an oxide in coordination with tetrahedra of AIO2 and PO2 oxide structural units in the molecular sieve (such as a divalent metal). The as-synthesized hydrated BPC-1 exhibits an X-ray powder diffraction pattern which contains at least the d spacings in Table 1 set forth hereinafter and is different from those reported for EMM-8 framework (Fig. lb). After calcination and subsequent hydration, BPC-1 exhibits an X-ray powder diffraction pattern which contains at least the d-spacings in Table 2 set forth hereinafter. After calcination and dehydration, BPC-1 exhibits poor X-ray powder diffraction pattern (Fig. 3) BPC-1 can be prepared by microwave-hydrothermal crystallization approach from a reaction mixture containing in addition to water, a reactive source of aluminum, phosphorus and fluoride and an organic templating agent which is 4-dimethylaminopyridine in the temperature range of 150-200 °C. 4 Thus, the present invention further provides a method of preparing a crystalline naterial comprising a reaction mixture of reactive source of aluminum, phosphorus, fluoride and an organic templating agent comprising 4-dimethylaminopyridine, respectively. The reaction mixture may further comprise a reactive source of a metal selected from the group consisting of B, Co, Cr, Cu, Fe, Ga, Ge, Mg, Mn, V, Ni, Sn, Ti, Zn and Zr. Thus, in a preferred feature, the present invention provides a novel crystalline molecular sieve is synthesized using 4-dimethylaminopyridine, having in its as-synthesized form, an X-ray diffraction pattern including the lines listed in Table 1. In another preferred feature the calcined form of a crystalline molecular sieve of the present invention has an X-ray diffraction pattern including the lines listed in Table 2. In another preferred feature the calcined form of a crystalline molecular sieve of the present invention displays poor X-ray crystallinity in the range of 2 theta 5-40° upon dehydration above 400 °C. In another preferred feature the calcined form of a crystalline molecular sieve of the present invention regains its crystallinity upon hydration in the range mentioned in claim 3. In another preferred feature the calcined form of a crystalline molecular sieve of the present invention comprising [A104] and [PO4] corner sharing tetrahedral units and having an X-ray diffraction pattern including the lines listed in Table 1. In another preferred feature the calcined form of a crystalline molecular sieve of the present invention also comprises [SiO4] corner sharing tetrahedral units. In another preferred feature the calcined form of a crystalline molecular sieve of the present invention is represented by the empirical formula, on dry basis: mR:aF" :(MxAlyPz)O2 wherein R represents at least one directing agent; wherein m is the number of moles of R per mole of (MxAlyPz)O2; wherein a is the number of moles of fluoride ion (F) per mole of (MxAlyPz)C Preferably, m has a value from 0 to about 3.0. Preferably, m has a value from about 0.05 to about 1.25. Preferably, R is 4-dimethylaminopyridine. Preferably, m/a is less than or equal to 2. Preferably, M is selected from one of the group consisting of B, Co, Cr, Cu, Fe, Ga, Ge, Mg, Mn, V, Ni, Sn, Ti, Zn and Zr. More preferably, M is silicon. 5 In another preferred feature the source F" ions used in the calcined form of crystalline molecular sieve of the present invention include salts containing one or several fluoride ions, such as metal fluorides, preferably, sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, strontium fluoride, barium fluoride, ammonium fluoride, tetraalkylammonium fluorides, such as tetramethylammonium fluoride, tetraethylammonium fluoride, hydrogen fluoride, and mixtures thereof. Preferably, wherein x is from 0 to about 0.50, y is from about 0.3 to about 0.5 and z is from about 0.2 to about 0.5. In a preferred embodiment, the present invention also relates to a method of synthesizing the crystalline material comprising (a) forming a reaction mixture comprising water; a source of aluminum, a source of phosphorus, optionally a source of metal other than aluminum and phosphorous, a source of fluoride ions, and at least one directing agent comprising 4-dimethylaminopyridine (R); (b) inducing crystallization of said crystalline material from the reaction mixture under hydrothermal conditions; and (c) recovering said crystalline material from the reaction mixture. In another preferred feature the calcined form of crystalline molecular sieve of the present invention is crystallized under microwave-hydrothermal conditions. In another preferred feature the calcined form of crystalline molecular sieve of the present invention has surface area comparable to faujasite zeolite family. Preferably, the crystallization is carried out in the temperature range of 100 to 200 °C, more preferably in the temperature range of 150 to 180 °C. Preferably, the reaction mixture has a composition, in terms of mole ratios, within the following ranges: P205: A1203= 0.5 to 1.5 SiO2: A1203 = 0 to 0.8 H20: A1203 = 10 to 100 R:A1203= 0.5 to 5.0 F: A1203= 0.1 to 0.8. More preferably, the reaction mixture has a composition, in terms of mole ratios, within the following ranges: P205: A1203= 0.9 to 1.1 SiO2/MO2: A1203= 0.01 to 0.3 H2O:Al2O3=30 to 60 R: A1203= 1.0 to 4.0 F: Al2O3=0 to 0.5. In a preferred feature the calcined form of crystalline molecular sieve of the present invention can be adopted for hydrocarbon processes based on adsorption and catalysis such as hydroisomerization, alkylation, oxidation reactions, especially epoxidation reactions and separation of hydrocarbons. DESCRIPTION OF THE DRAWINGS FIG. la is an X-ray pattern (CuKα) of as synthesized BPC-1 6 FIG. lb is an X-ray pattern (CuK3) of as synthesized BPC-1 and its comparison with EMM-8. FIG. 2 is an X-ray pattern (CuK3) of calcined and hydrated BPC-1. DETAILED DESCRIPTION OF THE INVENTION The novel microporous aluminophosphate, BPC-1, of the present invention can be produced by microwave-hydrothermal crystallization from a reaction mixture containing reactive sources of phosphorus and aluminum and an organic templating agent (4-dimethylaminopyridine), a source of F" ions and, optionally, additional divalent metals or sources of silica. The preparative process typically comprises forming a reaction mixture which in terms of mole ratios is: A1203:P205: 0.5HF:0.3-2 R :10-100H2O where R is the organic templating agent 4-dimethylaminopyridine. The reaction mixture is placed in a teflon vessel inert toward the reaction mixture and heated under microwave-hydrothermal conditions (MARS-5, CEM Corp, USA) under static conditions at a temperature of at least about 100 °C, preferably between 150 °C. and 300 °C, until crystallized, usually a period of from 5 to 120 mins. The solid crystalline reaction product is then recovered by any convenient method, such as filtration or centrifugation, washed with water and dried in air at a temperature between ambient and about lOO.degree. C. In a preferred crystallization method, the source of phosphorus is phosphoric acid, and the source of aluminum is a hydrated aluminum oxide of the trade name Catapal (Sasol), the temperature is 150 °C to 200 °C, the crystallization time is from 15 to 60 mins, and the ratio of compounds in the reaction mixture is A1203:1.0-1.2P205: 0.5HF: 1.0-1.5R:50-75H2O The templating agent is 4-dimethylaminopyridine and is present in the reaction mixture in an amount ranging from about 1.0 to 1.5 moles per mole of alumina. Additionally present may be sources of divalent metals such as magnesium, manganese, cobalt, zinc, nickel and so forth. In these instances it is anticipated that these metals will replace Al in the lattice so the amount of Al provided in the synthesis is reduced accordingly. Silica may also be introduced into the reaction. Typically, silicon will replace P in the lattice, so the amount of P provided in the synthesis is reduced accordingly. The template-containing as-synthesized form of BPC-1 has an essential framework structure whose chemical composition expressed in terms of mole ratios is: Al2O3:1.0.+-.0.2P2O5:0.14R:xSiO2:yMeO:zF where x, y, Me and z are as defined above. 7 As-synthesized BPC-1 has a characteristic X-ray powder diffraction pattern (Fig. 1) which contains at least the d-spacings set forth in Table 1 below: Table 1: X-ray diffraction data for as-synthesized BPC-1 2 theta d(A) 6.17 14.31 7.67 11.51 8.25 10.70 8.94 9.87 12.57 7.03 12.81 6.90 13.95 6.34 14.14 6.25 14.34 6.17 15.25 5.80 16.16 5.47 18.12 4.89 18.98 4.66 19.72 4.49 20.41 4.35 20.85 4.26 22.24 3.99 23.O2 3.86 24.57 3.61 25.81 3.44 26.07 3.41 26.73 3.33 27.86 3.19 28.22 3.16 29.46 3.03 30.77 2.90 32.44 2.75 34.35 2.61 35.28 2.54 8 36.15 2.48 38.35 2.34 The complete X-ray powder diffraction pattern, including actual relative intensities, for hydrous, as-synthesized BPC-1 is set forth in Table IA below: Table IA: X-ray diffraction data for as-synthesized BPC-1 2 theta d(A) Relative Intensity(%) Remarks 6.17 14.31 100.00 VS 7.67 11.51 14.27 M 8.25 10.70 23.16 M 8.94 9.87 29.82 M 12.57 7.03 21.37 M 12.81 6.90 13.17 M 13.95 6.34 53.50 S 14.14 6.25 40.08 S 14.34 6.17 20.37 M 15.25 5.80 4.78 W 16.16 5.47 0.46 W 18.12 4.89 2.54 W 18.98 4.66 18.91 M 19.72 4.49 37.11 S 20.41 4.35 50.88 S 20.85 4.26 13.74 M 22.24 3.99 15.77 M 23.O2 3.86 14.79 M 24.57 3.61 11.10 M 25.81 3.44 53.45 S 26.07 3.41 33.56 s 26.73 3.33 13.12 M 27.86 3.19 16.43 M 28.22 3.16 6.43 W 29.46 3.03 5.40 W 30.77 2.90 4.89 32.44 2.75 2.54 34.35 2.61 3.00 35.28 2.54 5.88 36.15 2.48 7.09 38.35 2.34 2.64 The relative intensity I/I0 is given as a relative intensity scale to which the value of 100 is given to the most intense line on the X ray diffraction diagram :585 wherein the notations VS, S, M, and W which represent Very Strong, Strong, Medium, and Weak, respectively. When the as-synthesized BPC-1 compositions are calcined, i.e., heated at a temperature sufficiently high, typically between about 300 °C and about 700 °C, to remove essentially all of the organic templating agent present in the intracrystalline pore system and then rehydrated, the composition has an X-ray powder diffraction pattern (Fig. 2) which contains at least the d-spacings set forth in Table II below: Table 2: X-ray diffraction data for calcined and hydrated BPC-1 2 theta d (A) Relative Intensity(%) Remarks 7.57 7.97 12.72 13.59 14.31 15.99 17.37 18.86 19.79 20.49 21.25 22.44 25.45 25.91 27.25 11.65 11.08 6.95 6.51 6.18 5.54 5.10 4.70 4.48 4.33 4.18 3.95 3.49 3.44 3.27 100 VS 70.80 s 23.63 M 14.61 M 21.93 M 2.37 W 3.45 W 15.50 M 40.34 S 8.04 W 12.57 M 20.18 M 19.82 M 22.18 M 5.45 W 10 27.93 3.19 8.47 W 29.01 3.07 6.42 W 29.81 2.99 5.83 W 30.87 2.89 2.06 W 31.66 2.82 1.42 w 32.10 2.78 3.29 w 34.40 2.60 5.60 w 35.53 2.52 3.70 w 36.65 2.45 1.45 w The X ray diffraction diagram is obtained by radiocrystallographic analysis using a diffractometer, using the conventional powder technique using the copper Kal line (k =1.5406 A). Starting from the position of the diffraction peaks represented by the angle 20., the Bragg relationship is used to calculate the characteristic interplanar spacings, dhkl of the sample. The error in measurement 8 (dhkl) over dhkl is calculated from the Bragg relationship as a function of the absolute error 5 (28) in the measurement of 29. An absolute error 8 (20) of ± 0.2° is normally allowable. The relative intensity Irel for each value of dhkl is measured from the height of the corresponding diffraction peak. The X ray diffraction diagram of the crystalline solid BPC-1 of the invention includes at least the lines with the dhkl values given in Table 1. The dhkl column shows the mean values for the interplanar spacings in angstroms (A). Each of these values has a measurement error . 8 (dhkl) in the range ± 0.2 to ± 0.008 A. The room temperature powder X-ray diffraction pattern of BPC-1 changes dramatically after calcination to remove the occluded organic template and fluoride ions. It appears to closely resemble the X-ray diffraction pattern for the AFO type framework molecular sieve in calcined and hydrated form (US Pat. Appl. # 20050087478) and those reported for EMM-8 (US Pat. Appl.No. 2006/0074267). The calcined BPC-1 possesses appreciable microporosity, measured from nitrogen adsorption-desorption isotherm measurements at 77 K using AS-1C (Quantachrome, USA). The measured isotherm is typical of Type I in nature establishing the micropore nature for calcined form of BPC-1. The measured microporosity is found to be close to levels reported for FAU-type zeolites, thus indicating the likely presence of 12- and 8-rings. The calcined form of hydrated BPC-1 is found to loose X-ray crystallinity upon dehydration and found to regain the same upon exposure to moist air. 11 BPC-1 in calcined form exhibits surface characteristics which make it useful as a catalyst or catalyst support in various hydrocarbon conversion and oxidation reaction in fine chemical production. Such can be associated with catalytically active metals, e.g., by framework substitution, by impregnation, doping and the like, by methods traditionally used in the art for the fabrication of catalyst compositions. Further, BPC-1 in its calcined form can be used as a molecular sieve for the separation of molecular species. The following examples are provided to illustrate the invention and are not to be construed as limiting thereof: Example 1 Synthesis of BPC-1 BPC-1 is prepared by combining requisite amounts of hydrated aluminum oxide, (pseudo-boehmite), 85 wt % ortho-phosphoric acid (H3PO4), water, hydrofluoric acid and 4-dimethylaminopyridine (DMAP) to obtain a reactive gel composition of 1.25DMAP:Al2O3:P2O5:0.5HF: 50H2O The resulting mixture is stirred until a homogeneous mixture is observed. The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 5 mins. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature. A portion of the solid reaction product is analyzed and the following chemical analysis obtained: 14.6 wt % Al, 15.5 wt % P and 1.4 wt % F The organic content present in the crystallized solid was obtained by thermogravimetric analysis by following weight loss in the temperature range of 200-600 °C. The organic content is found to be about 22 wt%. The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1. Examples 2-5 The reactive gel is prepared as per procedure illustrated in example 1. The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 15,30, 60, 120 mins, respectively. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature. 12 The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1. Example 6 The reactive gel is prepared as per procedure illustrated in example 1 and required amount of Cabosil M-5 amorphous fumed silica is added in the prepared gel. The resultant mixture is once again mixed until homogeneous. The composition of reaction mixture in molar ratios is: 1.25DMAP:Al2O3:P2O5:0.5HF:0.1SiO2:50H2O The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 120 mins. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature. A portion of the solid reaction product is analyzed and the following chemical analysis obtained: 0.67 wt % Si, 14.6 wt % Al, 14.7 wt % P and 1.4 wt % F The organic content present in the crystallized solid was obtained by thermogravimetric analysis by following weight loss in the temperature range of 200-600 °C. The organic content is found to be about 22 wt%. The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1. Example 7 The reactive gel is prepared as per procedure illustrated in example 1 and requisite amount of Cobalt nitrate amorphous fumed silica is added in the prepared gel. The resultant mixture is once again mixed until homogeneous. The composition of reaction mixture in molar ratios is: 1.25DMAP:Al2O3:P2O5:0.5HF:0.1CO2O3:50H2O The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 120 mins. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature. A portion of the solid reaction product is analyzed and the following chemical analysis obtained: 1.8 wt % Co, 11.lwt % Al, 12.7 wt % P and 1.4 wt % F The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1. 13 Example 8 Calcination of BPC-1 The material from Example 1 is calcined in air in the following manner. A thin bed of material is heated in a tubular quartz reactor from room temperature to 120 °C at a rate of 1 °C per minute and held at 120 °C for two hours. The temperature is then ramped up to 540 °C at the same rate and held at this temperature for 10 hours. Example 9 X-ray diffraction analysis X-ray diffraction pattern for material from Example 7 is measured in the 2theta range of 5-40 °C with CuK3 radiation with a 0.O2° step size and Is step time. The X-ray diffraction pattern was measured using a Philips X'pert powder diffractometer system. The measured X-ray diffraction pattern is found to be as per Table 2. Example 10 Nitrogen Adsorption Analysis The calcined form of BPC-1 has a micropore volume (t-plot) of about 0.28 cc/gm with surface area of about 800 m2/g based on adsorption isotherm at 77 K recorded on ASIC unit from Quantachrome. The nitrogen adsorption isotherm is analyzed using the non linear density function theory (NLDFT) approach (J. Phys. Chem. B.; 2001 105(29); 6817) and the conventional t-plot method (J. Catalysis, 1965, 4, 319). The DFT analysis also shows that calcined form BPC-1 has at least one large pore Dated this the 18th day of July, 2006

Full Text

FORM 2
THE PATENTS ACT, 1970
(39 of 1970) The Patent Rules, 2003
PROVISIONAL SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
"NOVEL ALUMINOPHOSPHATE MOLECULAR SIEVE: BPC-1,
ITS SYNTHESIS AND USE"
We, BHARAT PETROLEUM CORPORATION LIMITED, of Bharat Bhawan, 4 8B 6 Currimbhoy Road, Ballard Estate, Mumbai - 400001, India;
The following specification describes the invention:

FIELD OF INVENTION
The present invention relates to a novel microporous aluminophosphate framework, or a substituted derivative thereof, to a method of its synthesis in fluoride medium under microwave-hydrothermal conditions.
BACKGROUND OF INVENTION
Crystalline molecular sieves have a 3-dimensional, microporous frameworks having tetrahedrally coordinated cation [TO4]. Generally, frameworks comprising oxygen tetrahedra of aluminium and silicon cations leads to the formation of microporous aluminosilicate framework commonly known as zeolites. On the other hand, 3-dimensional microporous aluminophosphate (AlPOs) frameworks classified as zeo-type molecular sieves are composed of oxygen tetrahedra of Al and P cations whereas silicoaluminophosphate (SAPOs) type molecular sieves composed of oxygen tetrahedra of Si, Al and P cations.
Molecular sieves are typically described in terms of the size of pore window which is based on the number of T atoms present in the pore window. Typically they are classified as small, medium and large pore molecular sieves based on their pore opening. The small pore molecular sieves have pore size in between 0.4-0.5 nm. Medium pore molecular sieves have pore size in between 0.5-0.6 nm whereas large pore molecular sieves have pore opening of 0.6-0.8 nm (See R. Szostak, Molecular Sieves: Principles of synthesis and Identification, 2nd edition, Blackie Academic and Professional, London, 1998).
Wide spread application of crystalline molecular sieves in the field of petroleum processing, petrochemical, fine chemical has led to sustained research effort, both in industry and academia, for their discovery. This has resulted into synthesis of new frameworks such as ITQ-13 (Corma, et.al., Angew. Chem. Int. Ed. 42, 1156-1159 (2003)), ITQ-12 (Barrett et.al. Chem. Commun. (2003)), SSZ-53, -59 (Burton et.al. Chemistry: a Eur. Journal 9, 5737-5748 (2003), Chemistry: a Eur. Journal 9, 5737-5748 (2003)) in recent times.
Molecular sieves are usually synthesized under hydrothermal conditions from a reactive gel comprising of aluminum, silica and/or phosphorous sources in the presence of an organic structure directing agent, such as an organic nitrogen compound in the temperature range of 100-200 °C. Commonly used nitrogen compounds are amines, diamines and quaternary ammonium salts.
Such syntheses also carried out under solvothermal conditions employing nonaqueous solvents such as glycols. The use of mineralizing agents is also practiced in molecular sieve synthesis. For example, EP-A-337,479 discloses the use of hydrogen fluoride in water at low pH to mineralize silica in glass for the synthesis of ZSM-5. The use of
fluoride medium is also depicted in US pat.6,793,901 for synthesis of aluminophosphate or
2

silicoaluminophosphate molecular sieves having the CHA framework. The use of fluoride media is also reported to lead to the formation of large zeolite crystals (see Berger et.al. Microporous and Mesoporous Materials 83, (1-3) , 2005, 333-344).
Some of the zeolites cited above have been synthesized in a fluoride medium in which the mobilizing agent is not the usual hydroxide ion but a fluoride ion in accordance with a process initially in U.S. Pat. No. 4,073,865. One advantage of such fluorine-containing reaction systems is to allow the production of purely siliceous zeolites containing fewer defects than zeolites obtained in a traditional OH" medium (J M Chezeau et al, Zeolites 1991, 11, 598). A further decisive advantage of using fluorine-containing reaction media is to allow the production of novel framework topologies containing double cycles of four tetrahedra, as is the case with ITQ-7, ITQ-13 and ITQ-17 zeolites.
Recently, the use of fluoride medium has led to crystallization of novel large pore aluminophosphate based molecular sieve of AFO type (Morris et al. Chem. Mater. 2004, 16, 2844).
More recently, the crystallization of EMM-8 phase (US Pat. Appl. No. 2006/0074267) has been disclosed from fluoride free medium. Such framework has been claimed to be isostructural to AFO type framework on calcination.
The crystalline molecular sieve composition, BPC-1, disclosed in the present invention exhibits unique X-ray diffraction pattern with four peaks in the range of 2 theta 5-10 ° and differs with that of EMM-8. Thus its structural framework is primarily different than that of EMM-8.
In general crystallization of molecular sieves is performed under hydrothermal conditions in the temperature range of 100-200 °C which usually requires prolonged crystallization time for phase formation. This sometimes leads to the formation of thermodynamically stable dense phases such as tridymite, cristobalite, berlinite, quartz as impure phases. This is due to the metastable nature of zeolitic framework under crystallization conditions. Furthermore, conventional hydrothermal approach is often found to be energy intensive.
The microwave-assisted synthesis of molecular sieves is a relatively new area of research (Komarneni, et.al. Mater. Res. Bull. 1992, 27, 1393; Ionics 1995, 21, 95). It offers many distinct advantages over conventional synthesis. They include rapid heating to crystallization temperature due to volumetric heating, resulting in homogeneous nucleation, fast supersaturation by the rapid dissolution of precipitated gels and eventually a shorter crystallization time compared to conventional autoclave heating. It is also energy efficient
and economical.
3

This method has been successfully applied for the synthesis of several types of zeolites namely zeolite A, Y, ZSM-5, MCM- 41, metal substituted aluminophosphate and gallophosphate. It has also been successfully applied for the synthesis of mesostructured thiogermanates / germanium sulfides. A rapid synthesis of titanium substituted MCM-41 molecular sieve has also been reported using microwave assisted approach. Recently, a rapid synthesis of SBA-15 and Ti-, and Zr-SBA-15 framework under microwave-hydrothermal conditions has been reported (Cundy, C. S. Coll. Czech. Chem. Commun. 1998, 63, 1699, Oberender et.al. Mat. Res. Symp. Proc. 1999, 547, 433. Kang, et.al. Catal. Lett. 1999, 59, 45. Newalkar, et.al. Chem. Commun. 2000, 2389, Chem. Mater. 2001, 13, 552).
The use of microwave-hydrothermal conditions in our research has led to the invention of novel microporous aluminophosphate framework designated as BPC-1 in the presence of fluoride ions. The crystallized framework also appears to be isostructural to AFO type framework upon calcination.
SUMMARY OF THE INVENTION
The present invention provides novel microporous crystalline aluminophosphates ("ALPO's), aluminosilicophosphates ("APSO's") metalloaluminophosphates ("MAPO's") and metalloaiuminosilicophosphates ("MAPSO's") denominated BPC-1 and the methods for its preparation. BPC-1 has an essential framework structure whose chemical composition, expressed in terms of mole ratios is:
A1203:1.0.+-.0.2P2O5:xSiO2:yMeO:zF:mR where x has a value of 0 to 0.15 and y has a value of 0 to 0.5, z has a value of 0 to 0.80, m has a value of 0.3 to 5 and Me represents at least one element, other than aluminum, phosphorus or silicon, which is capable of forming an oxide in coordination with tetrahedra of AIO2 and PO2 oxide structural units in the molecular sieve (such as a divalent metal).
The as-synthesized hydrated BPC-1 exhibits an X-ray powder diffraction pattern which contains at least the d spacings in Table 1 set forth hereinafter and is different from those reported for EMM-8 framework (Fig. lb).
After calcination and subsequent hydration, BPC-1 exhibits an X-ray powder diffraction pattern which contains at least the d-spacings in Table 2 set forth hereinafter.
After calcination and dehydration, BPC-1 exhibits poor X-ray powder diffraction pattern (Fig. 3)
BPC-1 can be prepared by microwave-hydrothermal crystallization approach from a
reaction mixture containing in addition to water, a reactive source of aluminum, phosphorus
and fluoride and an organic templating agent which is 4-dimethylaminopyridine in the
temperature range of 150-200 °C.
4

Thus, the present invention further provides a method of preparing a crystalline naterial comprising a reaction mixture of reactive source of aluminum, phosphorus, fluoride and an organic templating agent comprising 4-dimethylaminopyridine, respectively. The reaction mixture may further comprise a reactive source of a metal selected from the group consisting of B, Co, Cr, Cu, Fe, Ga, Ge, Mg, Mn, V, Ni, Sn, Ti, Zn and Zr.
Thus, in a preferred feature, the present invention provides a novel crystalline molecular sieve is synthesized using 4-dimethylaminopyridine, having in its as-synthesized form, an X-ray diffraction pattern including the lines listed in Table 1.
In another preferred feature the calcined form of a crystalline molecular sieve of the present invention has an X-ray diffraction pattern including the lines listed in Table 2.
In another preferred feature the calcined form of a crystalline molecular sieve of the present invention displays poor X-ray crystallinity in the range of 2 theta 5-40° upon dehydration above 400 °C.
In another preferred feature the calcined form of a crystalline molecular sieve of the present invention regains its crystallinity upon hydration in the range mentioned in claim 3.
In another preferred feature the calcined form of a crystalline molecular sieve of the present invention comprising [A104] and [PO4] corner sharing tetrahedral units and having an X-ray diffraction pattern including the lines listed in Table 1.
In another preferred feature the calcined form of a crystalline molecular sieve of the present invention also comprises [SiO4] corner sharing tetrahedral units.
In another preferred feature the calcined form of a crystalline molecular sieve of the present invention is represented by the empirical formula, on dry basis: mR:aF" :(MxAlyPz)O2 wherein R represents at least one directing agent; wherein m is the number of moles of R per mole of (MxAlyPz)O2; wherein a is the number of moles of fluoride ion (F) per mole of (MxAlyPz)C Preferably, m has a value from 0 to about 3.0.
Preferably, m has a value from about 0.05 to about 1.25.
Preferably, R is 4-dimethylaminopyridine.
Preferably, m/a is less than or equal to 2.
Preferably, M is selected from one of the group consisting of B, Co, Cr, Cu, Fe, Ga, Ge, Mg, Mn, V, Ni, Sn, Ti, Zn and Zr.
More preferably, M is silicon.
5

In another preferred feature the source F" ions used in the calcined form of crystalline molecular sieve of the present invention include salts containing one or several fluoride ions, such as metal fluorides, preferably, sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, strontium fluoride, barium fluoride, ammonium fluoride, tetraalkylammonium fluorides, such as tetramethylammonium fluoride, tetraethylammonium fluoride, hydrogen fluoride, and mixtures thereof.
Preferably, wherein x is from 0 to about 0.50, y is from about 0.3 to about 0.5 and z is from about 0.2 to about 0.5.
In a preferred embodiment, the present invention also relates to a method of synthesizing the crystalline material comprising (a) forming a reaction mixture comprising water; a source of aluminum, a source of phosphorus, optionally a source of metal other than aluminum and phosphorous, a source of fluoride ions, and at least one directing agent comprising 4-dimethylaminopyridine (R); (b) inducing crystallization of said crystalline material from the reaction mixture under hydrothermal conditions; and (c) recovering said crystalline material from the reaction mixture.
In another preferred feature the calcined form of crystalline molecular sieve of the present invention is crystallized under microwave-hydrothermal conditions.
In another preferred feature the calcined form of crystalline molecular sieve of the present invention has surface area comparable to faujasite zeolite family.
Preferably, the crystallization is carried out in the temperature range of 100 to 200 °C, more preferably in the temperature range of 150 to 180 °C.
Preferably, the reaction mixture has a composition, in terms of mole ratios, within the following ranges: P205: A1203= 0.5 to 1.5 SiO2: A1203 = 0 to 0.8 H20: A1203 = 10 to 100 R:A1203= 0.5 to 5.0 F: A1203= 0.1 to 0.8.
More preferably, the reaction mixture has a composition, in terms of mole ratios, within the following ranges: P205: A1203= 0.9 to 1.1 SiO2/MO2: A1203= 0.01 to 0.3 H2O:Al2O3=30 to 60 R: A1203= 1.0 to 4.0 F: Al2O3=0 to 0.5.
In a preferred feature the calcined form of crystalline molecular sieve of the present invention can be adopted for hydrocarbon processes based on adsorption and catalysis such as hydroisomerization, alkylation, oxidation reactions, especially epoxidation reactions and separation of hydrocarbons.
DESCRIPTION OF THE DRAWINGS
FIG. la is an X-ray pattern (CuKα) of as synthesized BPC-1
6

FIG. lb is an X-ray pattern (CuK3) of as synthesized BPC-1 and its comparison with EMM-8.
FIG. 2 is an X-ray pattern (CuK3) of calcined and hydrated BPC-1. DETAILED DESCRIPTION OF THE INVENTION
The novel microporous aluminophosphate, BPC-1, of the present invention can be produced by microwave-hydrothermal crystallization from a reaction mixture containing reactive sources of phosphorus and aluminum and an organic templating agent (4-dimethylaminopyridine), a source of F" ions and, optionally, additional divalent metals or sources of silica. The preparative process typically comprises forming a reaction mixture which in terms of mole ratios is:
A1203:P205: 0.5HF:0.3-2 R :10-100H2O where R is the organic templating agent 4-dimethylaminopyridine. The reaction mixture is placed in a teflon vessel inert toward the reaction mixture and heated under microwave-hydrothermal conditions (MARS-5, CEM Corp, USA) under static conditions at a temperature of at least about 100 °C, preferably between 150 °C. and 300 °C, until crystallized, usually a period of from 5 to 120 mins. The solid crystalline reaction product is then recovered by any convenient method, such as filtration or centrifugation, washed with water and dried in air at a temperature between ambient and about lOO.degree. C.
In a preferred crystallization method, the source of phosphorus is phosphoric acid, and the source of aluminum is a hydrated aluminum oxide of the trade name Catapal (Sasol), the temperature is 150 °C to 200 °C, the crystallization time is from 15 to 60 mins, and the ratio of compounds in the reaction mixture is
A1203:1.0-1.2P205: 0.5HF: 1.0-1.5R:50-75H2O
The templating agent is 4-dimethylaminopyridine and is present in the reaction mixture in an amount ranging from about 1.0 to 1.5 moles per mole of alumina. Additionally present may be sources of divalent metals such as magnesium, manganese, cobalt, zinc, nickel and so forth. In these instances it is anticipated that these metals will replace Al in the lattice so the amount of Al provided in the synthesis is reduced accordingly. Silica may also be introduced into the reaction. Typically, silicon will replace P in the lattice, so the amount of P provided in the synthesis is reduced accordingly.
The template-containing as-synthesized form of BPC-1 has an essential framework structure whose chemical composition expressed in terms of mole ratios is:
Al2O3:1.0.+-.0.2P2O5:0.14R:xSiO2:yMeO:zF where x, y, Me and z are as defined above.
7

As-synthesized BPC-1 has a characteristic X-ray powder diffraction pattern (Fig. 1) which contains at least the d-spacings set forth in Table 1 below: Table 1: X-ray diffraction data for as-synthesized BPC-1

2 theta d(A)
6.17 14.31
7.67 11.51
8.25 10.70
8.94 9.87
12.57 7.03
12.81 6.90
13.95 6.34
14.14 6.25
14.34 6.17
15.25 5.80
16.16 5.47
18.12 4.89
18.98 4.66
19.72 4.49
20.41 4.35
20.85 4.26
22.24 3.99
23.O2 3.86
24.57 3.61
25.81 3.44
26.07 3.41
26.73 3.33
27.86 3.19
28.22 3.16
29.46 3.03
30.77 2.90
32.44 2.75
34.35 2.61
35.28 2.54
8

36.15 2.48
38.35 2.34
The complete X-ray powder diffraction pattern, including actual relative intensities, for hydrous, as-synthesized BPC-1 is set forth in Table IA below: Table IA: X-ray diffraction data for as-synthesized BPC-1

2 theta d(A) Relative Intensity(%) Remarks
6.17 14.31 100.00 VS
7.67 11.51 14.27 M
8.25 10.70 23.16 M
8.94 9.87 29.82 M
12.57 7.03 21.37 M
12.81 6.90 13.17 M
13.95 6.34 53.50 S
14.14 6.25 40.08 S
14.34 6.17 20.37 M
15.25 5.80 4.78 W
16.16 5.47 0.46 W
18.12 4.89 2.54 W
18.98 4.66 18.91 M
19.72 4.49 37.11 S
20.41 4.35 50.88 S
20.85 4.26 13.74 M
22.24 3.99 15.77 M
23.O2 3.86 14.79 M
24.57 3.61 11.10 M
25.81 3.44 53.45 S
26.07 3.41 33.56 s
26.73 3.33 13.12 M
27.86 3.19 16.43 M
28.22 3.16 6.43 W
29.46 3.03 5.40 W

30.77 2.90 4.89
32.44 2.75 2.54
34.35 2.61 3.00
35.28 2.54 5.88
36.15 2.48 7.09
38.35 2.34 2.64
The relative intensity I/I0 is given as a relative intensity scale to which the value of 100 is given to the most intense line on the X ray diffraction diagram :585 wherein the notations VS, S, M, and W which represent Very Strong, Strong, Medium, and Weak, respectively.
When the as-synthesized BPC-1 compositions are calcined, i.e., heated at a temperature sufficiently high, typically between about 300 °C and about 700 °C, to remove essentially all of the organic templating agent present in the intracrystalline pore system and then rehydrated, the composition has an X-ray powder diffraction pattern (Fig. 2) which contains at least the d-spacings set forth in Table II below:
Table 2: X-ray diffraction data for calcined and hydrated BPC-1 2 theta d (A) Relative Intensity(%) Remarks

7.57
7.97
12.72
13.59
14.31
15.99
17.37
18.86
19.79
20.49
21.25
22.44
25.45
25.91
27.25

11.65
11.08
6.95
6.51
6.18
5.54
5.10
4.70
4.48
4.33
4.18
3.95
3.49
3.44
3.27

100 VS
70.80 s
23.63 M
14.61 M
21.93 M
2.37 W
3.45 W
15.50 M
40.34 S
8.04 W
12.57 M
20.18 M
19.82 M
22.18 M
5.45 W

10

27.93 3.19 8.47 W
29.01 3.07 6.42 W
29.81 2.99 5.83 W
30.87 2.89 2.06 W
31.66 2.82 1.42 w
32.10 2.78 3.29 w
34.40 2.60 5.60 w
35.53 2.52 3.70 w
36.65 2.45 1.45 w
The X ray diffraction diagram is obtained by radiocrystallographic analysis using a diffractometer, using the conventional powder technique using the copper Kal line (k =1.5406 A). Starting from the position of the diffraction peaks represented by the angle 20., the Bragg relationship is used to calculate the characteristic interplanar spacings, dhkl of the sample. The error in measurement 8 (dhkl) over dhkl is calculated from the Bragg relationship as a function of the absolute error 5 (28) in the measurement of 29. An absolute error 8 (20) of ± 0.2° is normally allowable. The relative intensity Irel for each value of dhkl is measured from the height of the corresponding diffraction peak. The X ray diffraction diagram of the crystalline solid BPC-1 of the invention includes at least the lines with the dhkl values given in Table 1. The dhkl column shows the mean values for the interplanar spacings in angstroms (A). Each of these values has a measurement error . 8 (dhkl) in the range ± 0.2 to ± 0.008 A.
The room temperature powder X-ray diffraction pattern of BPC-1 changes dramatically after calcination to remove the occluded organic template and fluoride ions. It appears to closely resemble the X-ray diffraction pattern for the AFO type framework molecular sieve in calcined and hydrated form (US Pat. Appl. # 20050087478) and those reported for EMM-8 (US Pat. Appl.No. 2006/0074267).
The calcined BPC-1 possesses appreciable microporosity, measured from nitrogen adsorption-desorption isotherm measurements at 77 K using AS-1C (Quantachrome, USA). The measured isotherm is typical of Type I in nature establishing the micropore nature for calcined form of BPC-1. The measured microporosity is found to be close to levels reported for FAU-type zeolites, thus indicating the likely presence of 12- and 8-rings.
The calcined form of hydrated BPC-1 is found to loose X-ray crystallinity upon dehydration and found to regain the same upon exposure to moist air.
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BPC-1 in calcined form exhibits surface characteristics which make it useful as a catalyst or catalyst support in various hydrocarbon conversion and oxidation reaction in fine chemical production. Such can be associated with catalytically active metals, e.g., by framework substitution, by impregnation, doping and the like, by methods traditionally used in the art for the fabrication of catalyst compositions.
Further, BPC-1 in its calcined form can be used as a molecular sieve for the separation of molecular species.
The following examples are provided to illustrate the invention and are not to be construed as limiting thereof: Example 1 Synthesis of BPC-1
BPC-1 is prepared by combining requisite amounts of hydrated aluminum oxide, (pseudo-boehmite), 85 wt % ortho-phosphoric acid (H3PO4), water, hydrofluoric acid and 4-dimethylaminopyridine (DMAP) to obtain a reactive gel composition of
1.25DMAP:Al2O3:P2O5:0.5HF: 50H2O The resulting mixture is stirred until a homogeneous mixture is observed. The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 5 mins. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature.
A portion of the solid reaction product is analyzed and the following chemical analysis obtained:
14.6 wt % Al, 15.5 wt % P and 1.4 wt % F
The organic content present in the crystallized solid was obtained by thermogravimetric analysis by following weight loss in the temperature range of 200-600 °C. The organic content is found to be about 22 wt%.
The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1.
Examples 2-5
The reactive gel is prepared as per procedure illustrated in example 1. The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 15,30, 60, 120 mins, respectively. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature.
12

The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1.
Example 6
The reactive gel is prepared as per procedure illustrated in example 1 and required amount of Cabosil M-5 amorphous fumed silica is added in the prepared gel. The resultant mixture is once again mixed until homogeneous. The composition of reaction mixture in molar ratios is:
1.25DMAP:Al2O3:P2O5:0.5HF:0.1SiO2:50H2O
The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 120 mins. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature.
A portion of the solid reaction product is analyzed and the following chemical analysis obtained:
0.67 wt % Si, 14.6 wt % Al, 14.7 wt % P and 1.4 wt % F
The organic content present in the crystallized solid was obtained by thermogravimetric analysis by following weight loss in the temperature range of 200-600 °C. The organic content is found to be about 22 wt%.
The crystallized product is analyzed by X-ray powder diffraction for phase identification and found to be BPC-1 as per Table 1.
Example 7
The reactive gel is prepared as per procedure illustrated in example 1 and requisite amount of Cobalt nitrate amorphous fumed silica is added in the prepared gel. The resultant mixture is once again mixed until homogeneous. The composition of reaction mixture in molar ratios is:
1.25DMAP:Al2O3:P2O5:0.5HF:0.1CO2O3:50H2O
The reaction mixture is sealed in a pressure vessel lined with polytetrafluoroethylene and heated at 180 °C under microwave-hydrothermal conditions at autogenous pressure for 120 mins. The solid reaction product is recovered by filtration, washed with water and dried in air at ambient temperature.
A portion of the solid reaction product is analyzed and the following chemical analysis obtained:
1.8 wt % Co, 11.lwt % Al, 12.7 wt % P and 1.4 wt % F
The crystallized product is analyzed by X-ray powder diffraction for phase
identification and found to be BPC-1 as per Table 1.
13

Example 8 Calcination of BPC-1
The material from Example 1 is calcined in air in the following manner. A thin bed of material is heated in a tubular quartz reactor from room temperature to 120 °C at a rate of 1 °C per minute and held at 120 °C for two hours. The temperature is then ramped up to 540 °C at the same rate and held at this temperature for 10 hours.
Example 9
X-ray diffraction analysis
X-ray diffraction pattern for material from Example 7 is measured in the 2theta range of 5-40 °C with CuK3 radiation with a 0.O2° step size and Is step time. The X-ray diffraction pattern was measured using a Philips X'pert powder diffractometer system. The measured X-ray diffraction pattern is found to be as per Table 2.
Example 10
Nitrogen Adsorption Analysis
The calcined form of BPC-1 has a micropore volume (t-plot) of about 0.28 cc/gm with surface area of about 800 m2/g based on adsorption isotherm at 77 K recorded on ASIC unit from Quantachrome. The nitrogen adsorption isotherm is analyzed using the non linear density function theory (NLDFT) approach (J. Phys. Chem. B.; 2001 105(29); 6817) and the conventional t-plot method (J. Catalysis, 1965, 4, 319). The DFT analysis also shows

that calcined form BPC-1 has at least one large pore

Dated this the 18th day of July, 2006

A NOVEL MICROPOROUS CRYSTALLINE SILICOALUMINO/(METALLO) ALUMINOPHOSPHATE MOLECILAR SIEVE AND METHOD OF SYNTHESIS THEREOF

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