Title of Invention	" A PROCESS FRO DETOXIFICATION OF JATROPHA SEED OIL."
Abstract	This invention relates to a process for the detoxification jatropha seed oil comprising neutralization of free fatty acids from the oil, mixing said neutralized oil with a polar solvent in the ratio of 10:0.8-1.2 in one flask, taking a non-polar solvent in another flask in the ratio of 5:1-1.5 of the oil, attaching said flasks to liquid-liquid extraction assembly and heating the flask containing non-polar solvent to a temperature of 60 to 80°C so as to dissolve the oil therein, removing the oil from the petroleum ether by distillation method and then bleaching said oil to get the detoxificated oil.

Title of Invention

" A PROCESS FRO DETOXIFICATION OF JATROPHA SEED OIL."

Abstract

This invention relates to a process for the detoxification jatropha seed oil comprising neutralization of free fatty acids from the oil, mixing said neutralized oil with a polar solvent in the ratio of 10:0.8-1.2 in one flask, taking a non-polar solvent in another flask in the ratio of 5:1-1.5 of the oil, attaching said flasks to liquid-liquid extraction assembly and heating the flask containing non-polar solvent to a temperature of 60 to 80°C so as to dissolve the oil therein, removing the oil from the petroleum ether by distillation method and then bleaching said oil to get the detoxificated oil.

Full Text	FIELD OF THE INVENTION This invention relates to a process for detoxification of Jatropha seed oil. BACKGROUND OF THE INVENTION Jatropha curcas, commonly known as wild castor, safed arand, ratanjyot or physic nut, belongs to the family euphorbiaceae. The seeds are rich in kernel percentage (60-68%) which yield 46-58% of oil (38 to 40% on seed weight basis). However, the seeds contain some poisonous compounds (curcin, curcasin, phorbol) on account of which the oil is toxic and purgative, rendering the oil unfit for human consumption. Hence, till now all over the world, the oil is used in soap making, cosmetic industry and for illumination purpose etc. OBJECTS OF THE INVENTION An object of this invention is to propose a novel process for detoxification of Jatropha seed oil. Another object of this invention is to propose a novel process for detoxification of Jatropha seed oil so that it may be used for edible purposes. Still another object of this invention is to propose a novel process for detoxification of Jatropha seed oil which when edibly consumed does not produce any toxic symptoms. DESCRIPTION OF THE INVENTION According to this invention there is provided a process for the detoxification of Jatropha seed oil comprising neutralization of free fatty acids from the oil, mixing said neutralized oil with a polar solvent in the ratio of 10:0.8-1.2 in one flask, taking a non-polar solvent in another flask in the ratio of 5:1-1.5 of the oil, attaching said flasks to liquid-liquid extraction assembly and heating the flask containing non-polar solvent to a temperature of 60 to 80°C so as to dissolve the oil therein, removing the oil from the petroleum ether by distillation method and then bleaching said oil to get the detoxificated oil. In accordance with this invention the Jatropha seed oil is neutralized in a conventional manner. The neutralized oil is then subjected to the step of liquid-liquid extraction which is then subjected to the step of bleaching to get the detoxificated oil. The step of liquid-liquid extraction comprises in preparing a mix of neutralised oil and polar solvent in the ratio of 10:.8-1.2 in a flask. Heating a non-polar solvent in another flask to a temperature of 60-8CPC. The non-polar solvent used is in the ratio of 5:1-1.5 of the oil. By this process the toxic agent of the oil is left in the aqueous methanol and whole of the oil i dissolved in petroleum ether. The oil is then subsequently removed from the petroleum ether by distillation method. The oil so obtained is subjected to the step of bleaching as mentioned herein above in a conventional manner to remove the coloring agent from the oil and to get the detoxificated oil. A process for detoxification of atropha seed oil is herein described in detail with the help of the example. The jatropha seed oil is first neutralized by removing th« fatty acids from the oil by heating and cooling the oil and then treating the same with 0.1N sodium hydroxide solution. The aqueous portion is removed and the oil is washed to get the neutralized oil free of fatty acids. This step of neutralization of oil is as such known in the art and do not constitute an inventive features of this invention. Specifically according to this invention the neutralized oil is subjected to the step of liquid-liquid extraction by using polar and non-polar solvents. For this purpose the neutralized oil is mixed with a polar solvent like aqueous methanol in the ratio of 10:.8-1.2 respectively in a flask. The non-polar solvent like petroleum ether is heated in another flask separately at a temperature of 60-80°C. The petroleum ether used is in the ratio of 5:1-1.5 of the oil. By this process the toxic agents of the oil are left in the aqueous methanol and the oil is dissolved in the petroleum ether. The petroleum ether is subsequently removed from the oil by distillation method. The oil so obtained after distillation is subjected to the step of bleaching to get the detoxificated oil. The bleaching is done by using bleaching agent like activated earth. For this purpose the oil is heated at 50-6CP C and for 20-40 minutes. 40 to 60 gms of bleaching agent like activated earth is added and then the contents are again heated and filtered to get the oil. The process is further illustrated in the following example: EXAMPLE :- 1 litre of jatropha seed oil was heated at 50 °C for 30 minutes under occasional stirring. The heated oil was then cooled to the ambient temperature and 75ml of 0.1N sodium hydroxide solution was added. The aqueous portion was removed and the oil was washed with hot water to get the neutral oil. The neutral oil so obtained was mixed with 8 ml aqueous methanol in a flask. 400 ml of petroleum ether was heated in another flask at a temperature of 60-80 t for the liquid-liquid extraction purposes. By this process the toxic agent of the oil were left in the aqueous methanol and the oil was dissolved in petroleum ether which was removed by distillation method. The oil so obtained was again heated at 55°C for 30 minutes and 50 gms of activated earth was added to it and the contents were again heated for 30 minutes with activated earth and was filtered to get the detoxificated oil. WE CLAIM; 1. A process for detoxification of jatropha seed oil comprising neutralization of fatty acids from the oil, subjecting the neutralized oil to the step of liquid-liquid extraction and then bleaching the same to get the detoxificated oil. 2. A process as claimed in claim 1,wherein the step of liquid-liquid extraction comprises mixing the neutral oil with a polar solvent in the ratio of 10:0.8-1.2 in one flask, heating a non-polar solvent at a temperature of 60 to 80°C separately in another flask and then removing the oil from the petroleum ether dissolved in it. 3. A process as claimed in claim 2, wherein said polar-solvent is for example aqueous methanol. 4. A process as claimed in claim 2, wherein the non-polar solvent is for example petroleum ether. 5. A process as claimed in claim 2, wherein the non-polar solvent used for the liquid-liquid extraction purposes is in the ratio of 5:1-1.5 of the oil. 6. A process as claimed in claim 1, wherein the step of bleaching comprises heating the oil at. a temperature of 50-60 °C and adding activated earth into it. and heating again and filtering the same to get the detoxificated oil. 7. A process for the preparation of a detoxification of jatropha seed oil substantially as herein described.

Full Text

FIELD OF THE INVENTION
This invention relates to a process for detoxification of Jatropha seed oil.
BACKGROUND OF THE INVENTION
Jatropha curcas, commonly known as wild castor, safed arand, ratanjyot or physic nut, belongs to the family euphorbiaceae. The seeds are rich in kernel percentage (60-68%) which yield 46-58% of oil (38 to 40% on seed weight basis). However, the seeds contain some poisonous compounds (curcin, curcasin, phorbol) on account of which the oil is toxic and purgative, rendering the oil unfit for human consumption. Hence, till now all over the world, the oil is used in soap making, cosmetic industry and for illumination purpose etc.
OBJECTS OF THE INVENTION
An object of this invention is to propose a novel process for detoxification of Jatropha seed oil.
Another object of this invention is to propose a novel process for detoxification of Jatropha seed oil so that it may be used for edible purposes.
Still another object of this invention is to propose a novel process for
detoxification of Jatropha seed oil which when edibly consumed does not produce any toxic symptoms.
DESCRIPTION OF THE INVENTION
According to this invention there is provided a process for the detoxification of Jatropha seed oil comprising neutralization of free fatty acids from the oil, mixing said neutralized oil with a polar solvent in the ratio of 10:0.8-1.2 in one flask, taking a non-polar solvent in another flask in the ratio of 5:1-1.5 of the oil, attaching said flasks to liquid-liquid extraction assembly and heating the flask containing non-polar solvent to a temperature of 60 to 80°C so as to dissolve the oil therein, removing the oil from the petroleum ether by distillation method and then bleaching said oil to get the detoxificated oil.
In accordance with this invention the Jatropha seed oil is neutralized in a conventional manner. The neutralized oil is then subjected to the
step of liquid-liquid extraction which is then subjected to the step of bleaching to get the detoxificated oil.
The step of liquid-liquid extraction comprises in preparing a mix of neutralised oil and polar solvent in
the ratio of 10:.8-1.2 in a flask. Heating a non-polar
solvent in another flask to a temperature of 60-8CPC. The non-polar solvent used is in the ratio of 5:1-1.5 of
the oil. By this process the toxic agent of the oil is left in the aqueous methanol and whole of the oil i
dissolved in petroleum ether. The oil is then subsequently removed from the petroleum ether by
distillation method. The oil so obtained is subjected to the step of bleaching as mentioned herein above in a
conventional manner to remove the coloring agent from the oil and to get the detoxificated oil.
A process for detoxification of atropha seed oil is herein described in detail with the help of the
example.
The jatropha seed oil is first neutralized by
removing th« fatty acids from the oil by heating and cooling the oil and then treating the same with 0.1N
sodium hydroxide solution. The aqueous portion is
removed and the oil is washed to get the neutralized oil free of fatty acids. This step of neutralization of oil is as such known in the art and do not constitute an inventive features of this invention.
Specifically according to this invention the
neutralized oil is subjected to the step of liquid-liquid extraction by using polar and non-polar solvents.
For this purpose the neutralized oil is mixed with a polar solvent like aqueous methanol in the ratio of
10:.8-1.2 respectively in a flask. The non-polar solvent like petroleum ether is heated in another flask
separately at a temperature of 60-80°C. The petroleum ether used is in the ratio of 5:1-1.5 of the oil. By
this process the toxic agents of the oil are left in the aqueous methanol and the oil is dissolved in the
petroleum ether. The petroleum ether is subsequently removed from the oil by distillation method. The oil so
obtained after distillation is subjected to the step of bleaching to get the detoxificated oil. The bleaching
is done by using bleaching agent like activated earth.
For this purpose the oil is heated at 50-6CP C and for 20-40 minutes. 40 to 60 gms of bleaching agent like
activated earth is added and then the contents are again heated and filtered to get the oil. The process is
further illustrated in the following example:
EXAMPLE :-
1 litre of jatropha seed oil was heated at 50 °C for 30 minutes under occasional stirring. The
heated oil was then cooled to the ambient temperature and 75ml of 0.1N sodium hydroxide solution was added.
The aqueous portion was removed and the oil was washed with hot water to get the neutral oil. The neutral oil
so obtained was mixed with 8 ml aqueous methanol in a flask. 400 ml of petroleum ether was heated in another flask at a temperature of 60-80 t for the liquid-liquid
extraction purposes. By this process the toxic agent of the oil were left in the aqueous methanol and the oil
was dissolved in petroleum ether which was removed by distillation method. The oil so obtained was again heated at 55°C for 30 minutes and 50 gms of activated
earth was added to it and the contents were again heated for 30 minutes with activated earth and was filtered to
get the detoxificated oil.

WE CLAIM;
1. A process for detoxification of jatropha seed oil
comprising neutralization of fatty acids from the oil,
subjecting the neutralized oil to the step of liquid-liquid extraction and then bleaching the same to get the detoxificated oil.
2. A process as claimed in claim 1,wherein the step
of liquid-liquid extraction comprises mixing the neutral
oil with a polar solvent in the ratio of 10:0.8-1.2 in one flask, heating a non-polar solvent at a temperature
of 60 to 80°C separately in another flask and then removing the oil from the petroleum ether dissolved in
it.
3. A process as claimed in claim 2, wherein said
polar-solvent is for example aqueous methanol.
4. A process as claimed in claim 2, wherein the non-polar solvent is for example petroleum ether.
5. A process as claimed in claim 2, wherein the non-polar solvent used for the liquid-liquid extraction
purposes is in the ratio of 5:1-1.5 of the oil.
6. A process as claimed in claim 1, wherein the step of bleaching comprises heating the oil at. a temperature of 50-60 °C and adding activated earth into it. and
heating again and filtering the same to get the detoxificated oil.
7. A process for the preparation of a detoxification of jatropha seed oil substantially as herein described.

Documents:

1575-del-1998-abstract.pdf

1575-del-1998-claims.pdf

1575-del-1998-correspondence-others.pdf

1575-del-1998-correspondence-po.pdf

1575-del-1998-description (complete).pdf

1575-del-1998-description (provisional).pdf

1575-del-1998-form-1.pdf

1575-del-1998-form-2.pdf

1575-del-1998-form-3.pdf

1575-del-1998-form-4.pdf

1575-del-1998-form-5.pdf

1575-del-1998-form-9.pdf

1575-del-1998-gpa.pdf

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Patent Number

189298

Indian Patent Application Number

1575/DEL/1998

PG Journal Number

31/2009

Publication Date

31-Jul-2009

Grant Date

29-Jul-2002

Date of Filing

09-Jun-1998

Name of Patentee

DIRECTOR

Applicant Address

FOREST RESEARCH INSTITUTE, P.O. NEW FOREST,DEHRA DUN-248006,

Inventors:

#	Inventor's Name	Inventor's Address
1	DR. P.P.JAIN	SCIENTIST-SD,CHEMISTRY DIVISION, FOREST RESEARCH INSTITUTE, P.O. NEW FOREST,DEHRA DUN-248006,
2	MR. RAVINDRA SINGH	RESEARCH ASSISTANT GRADE-I, CHEMISTRY FOREST RESEARCH INSTITUTE, P.O. NEW FOREST,DEHRA DUN-248006,

PCT International Classification Number

C11B 1/10

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA