Title of Invention

AN IMPROVED PROCESS FOR THE ISOLATION OF PURE BEZENE/TOLUENE

Abstract

An improved process for the isolation of pure benzene/toluene which comprises contacting the feedstock with mixture of solvent in a ratio ranging from 0.5 to 5 by weight selected from sulphonlane and 5-30 wt% co-solvent in a contacting zone counter at temperature ranging between 30 -80° C counter currently to produce extract phase and raffmate phase, feeding the above said extract phase into a distillation column to strip off the non aromatics from the extract hydrocarbons and then feeding the bottom phase of the stripper column into the solvent recovery column along with the stripper water at temperature between 1000-200 C, removing the benzene/toluene and solvent free water from top of the recovery column and recycling the recovered mixed solvent back into the contact zone and the solvent free water is fed for raffinate washing in the raffmate wash column if desired, thus recovering pure aromatics.

Full Text

CL.5 MODALITIES OF COLLABORATION CL.5.1 The respective responsibilites of CSIR/IIP and BPCL and schedule of fulfilment thereof shall be as per Annexure I. CL.5.2 There will be a joint Monitoring Group for the PROJECT. The Monitoring Group shall consist of two representatives each from IIP and BPCL. It shall review every six months the progress of the PROJECT. CL.6 RESPONSIBILITIES OF CSIR/IIP CL.6.1 CSTR/IIP shall undertake the work on the PROJECT as per shedule of work detailed in Annexure I at IIP Dehra Dun on developmet of solvents for aromatic extraction. CL.6.2 The period of completion of work should be mutually agreed upon. Further studies on the offshoot of work already done, shall be taken up on mutually agreed terms and conditions. CL.6.3 CSIR/IIP shall take the responsibility of advising BPCL on the consequence arising out of this part of work required to be done at BPCL premises which shall be carried out under consent of BPCL and supervision of IIP/BPCL. CL.6.4 IIP will execute the work programme as per Annexure I. Towards this objective it will commit all necessary resources including manpower and special analytical & irifrastructural facili ties. CL.6.5 IIP will submit quarterly report to BPCL about the progress of the PROJECT. CL.7 RESPONSIBILITIES OF BPCL CL.7..1 BPCL shall supply one barrel of reformate for this PROJECT. CL.7.2 BPCL shall cooperate with IIP to carry out field/ commercial trials of the solvents, if any. BPCL shall bear the total cost of these trials. CL.8 COMPLETION CL.8.1 The PROJECT shall be deemed to have been successfully completed on submission and acceptance of a joint Final Report. CL.9 RESULTS OF PROJECT CL.9.1 Any intellectual property rights/patents obtained by the parties hereto pertaining to the PROJECT prior to signing of the MoU shall remain the property of that party; the other party shall have the right to commercially exploit/use the intellectual property on mutually agreed terms. CL.9.2 The intellectual property, that is, knowhow/process/ design/technique/patents generated in the PROJECT shall be jointly owned/ by CSIR/IIP & BPCL on equal basis. CI..9.3 The procedural formalities for securing and maintaining the intellectual property rights/patents, if any, shall be the resposibility of CSIR/IIP and the expenditure incurred thereof shall be borne by each party equally. CL.9.4 The parties shall consult each other for any publication in respect of the PROJECT. These publications shall be in the names of research workers of IIP/BPCL, wherein it will be duly acknowledged that the work has been carried out under the collaborative programme between the parties. CL.10 CONFIDENTIALITY CL.10.1 During the tenure of the MoU both CSIR/IIP and BPCL undertake on their behalf and on behalf of their subcontractors/employees/representatives/associates to maintain strict confidentiality and prevent disclosure thereof, of all the information and data exchanged/generated pertaining to work for any purposes other than in accordance with this Moll. Both parties, on mutually agreed terms will use the R & D results generated during the PROJECT for their own R & D programmes. C.ll UTILISATION OF INTELLECTUAL PROPERTY DEVELOPED CL.11.1 BPCL shall have the first option to commercially exploit/use the intellectual property generated in the PROJECT. BPCL/IIP shall license the intellectual property generated in the PROJECT to others jointly. The terms and conditions for the commercial exploitation of the said intellectual property by a third party, shall be decided mutually between IIP and BPCL for which a separate MoU shall be entered into. CL.11.2 During the work envisaged under the MoU in the event of IIP scientists exploring, inventing or discovering results other than the specific objectives as detailed in the proposal of the PROJECT and as determined by CSIR/IIP and BPCL jointly, IIP shall retain absolute rights on such results. CSIR/IIP shall first offer such results to BPCL on negotiated terms by entering into a separate MoU. In case BPCL does not accept the offer, CSIR/IIP shall release such results to other parties on mutually agreed terms, CL.12 FORCE MAJEURE CL.12.1 Neither party shall be held responsible for non-fulfilment of their respective obligations under this MoU due to the exigency of one or more of the force majeure events such as but not limited to Acts of God, war, flood, earthquakes, strike, lockouts, epidemics, riots, civil commotion, etc. provided on the occurence and cessation of any such events, the party affected thereby shall give a notice in writing to the other party within one month of such occurence or cessation, If the force-majeure conditions continues beyond six months, the parties shall then mutually decide about the future course of action. CL.13 EFFECTIVE DATE, DURATION, TERMINATION OF THE MoU CL.13.1 The MoU shall be effective from the date of signing and shall remain in force for a period of 14 (fourteen) years from the said date. CL.13.2 The MoU shall terminate on the expiry of the period, as in Clause CL.13.1 unless extended by both the parties. CL.13.3 During the tenure of the Moll, parties hereto can terminate the MoU either for breach of any of the terms and conditions of this MoU or otherwise by giving a three months notice in writing to the defaulting party. Failure of either party to terminate the MoU on account of breach or default by the other shall not constitute a waiver of that party's right to terminate this MoU. CL.13.4 In the event of termination of the MoU vide clause 13.3 the rights and obligations of the parties thereto shall be settled by mutual discussion; the financial settlement-shall take into consideration not only the expenditure incurred but also the expenditure committed by the parties hereto. CL.13.5 The MoU arrived at between the parties hereto for the utilisation of the intellectual property shall survive the termination of the MoU. CL.14 NOTICES CL.14.1 All notices and other communication required to be served on BPCL under the terms of this MoU, shall be considered to be duly served if the same shall have been delivered to, left with or posted by registered mail to BPCL as its last known address of business. Similarly, any notice to be given to the CSIR shall be considered as duly served if the same shall have been delivered to, left with or posted by registered mail to the CSIR as its registered address in New Delh i . CL.15 AMENDMENTS TO THE MoU CL.15.1 No amendment or modification of this MoU shall be valid unless the same is made in writing by both the parties or their authorised representatives and specifically stating the same to be an amendment of this MoU. The modifications/ changes shall be effective from the date on which they are made/executed, unless otherwise agreed to. CL.16 ASSIGNMENT OF THE MoU CL.16.1 The rights or/and liabilities arising to any party to this MoU shall not be assigned except with the written consent of the other party and subject to such terms and conditions as may be mutually agreed upon. CL.17 ARBITRATION CL.17.1 In the event of any dispute or difference between the parties hereto, such disputes or difference shall be resolved amicably by mutual consuJation or through the good offices of empowered agencies of the Government of India. If such resolution is not possible, then, the unresolved dispute or difference shall be referred to arbitration of an arbitrator to be nominated by Secretary, Department of Legal Affairs ("Law Secretary"), Government of India, in terms of the Office Memorandum No. 55/3/1/75-CF dated the 19th November, 1975 issued by the Cabinet Secretariat (Department of Cabinet Affairs) Government of India, as modified from time to time. The Arbitration Act 1940 (10 of 1940) shall not be applicable to the arbitration under this clause. The award of the Arbitrator shall be binding upon parties to the dispute. Provided, however, any party aggrieved by such award may make a further reference for setting aside or revision of the award to Law Secretary whose decision shall bind the parties finally and conclusively. SEAL OF PARTIES In witness whereof the parties hereto have signed this MoU on the day, month and year mentioned hereinbefore. Parties For and on behalf of CSIR/IIP For and on behalf of BPCL ANNEXURE - I PLAN OF WORK 1. Generation of the phase equilibrium data Literature survery will be made to assist in solvent selection for aromatic extraction from naphtha fraction. Basic. LLE/VLE date will be generated in batch units with model hydrocarbon mixture for the screening of new solvents/solvent combinations. The above study will be to use actual naphtha feed with the selected solvents/solvent combinations. Attempts will be made to coorelate the LLE/VLE date generated above by appropriate solutions models. 2. Generation of Mass Transfer Data on Continuous Units i) Extraction studies Mass transfer studies will be carried out in continuous extractions units for the best sol vent/solvent combination under different operating conditions. To recover the traces of solvent in the raffinate phase, obtained in the above runs, raffinate wash study will be carriedout in extraction column using different water-to-raffinate phase ratio. Attempts will be made to simulate the data generated. ii) Distillateion studies Hydrocarbons recovering from the extract phase will be studied in continuous distillation unit to see the purity and recovery of hydrocarbons under differnt operating conditions. Time Estimate Total time for this project will be about two years from the day solvent and feed samples are received at IIP, Dehradun. We claim : 1. An improved process for the isolation of pure benzene/toluene which comprises contacting the feedstock with mixture of solvent in a ratio ranging from 0.5 to 5 by weight selected from sulpholane and 5-30 wt% co-solvent in a contacting zone counter at temperature ranging between 30-80°C counter currently to produce extract phase and raffinate phase, feeding the above said extract phase into a distillation column to strip off the non aromatics from the extract hydrocarbons and then feeding the bottom phase of the stripper column into the solvent recovery column along with the stripper water at temperature between 1000-200°C, removing the benzene/toluene and solvent free water from top of the recovery column and recycling the recovered mixed solvent back into the contact zone and the solvent free water is fed for raffinate washing in the raffinate wash column if desired, recovop pure or maties. 2. An improved process as claimed in claim 1 wherein amount of mixture of solvent comprising sulpholane and co-solvent preferably between 100-20-wt percent. 3. An improved process as claimed in claims 1-2 wherein the water content is preferably between 0.1 to 0.5% by wt. 4. An improved process as claimed in claims 1-3 wherein the solvent to hydrocarbon feed ratio ranges between 1-3 by weight. 5. An improved process as claimed in claims 1-4 wherein temperature of the contacting zone is preferably between 40-60°C. 6. An improved process as claimed in claims 1-5 wherein the temperature in the recovery column ranges preferably between 150-200°C. 7. An improved process for the isolation of pure benzene/toluene which is herein described with reference to examples and drawing accompanying the specification.

Documents:

177-del-1995-abstract.pdf

177-del-1995-claims.pdf

177-del-1995-correspondence-others.pdf

177-del-1995-correspondence-po.pdf

177-del-1995-desctiption (complete).pdf

177-del-1995-drawings.pdf

177-del-1995-form-1.pdf

177-del-1995-form-10.pdf

177-del-1995-form-2.pdf

177-del-1995-form-4.pdf

177-del-1995-form-9.pdf

177-del-1995-others-document.pdf