Process for the isolation of hydroxy fatty acid derivatives from convolvulaceae plants
First Claim
1. In a process for the isolation of a hydroxy fatty acid or alkyl ester thereof from Convolvulaceae plants by extracting parts of said plants with an extraction agent and subsequently subjecting the extraction liquor to hydrolysis, the improvement which comprises:
- (a) extracting the parts of the Convolvulaceae plants with an organic solvent;
(b) removing the solvent from at least the main part from the extract to obtain a resinous material containing the desired hydroxy fatty acid in ester form, dispersing the thus obtained material into water and subjecting the obtained dispersion to hydrolysis to form the hydroxy fatty acid or alkyl ester, said hydrolysis selected from the group consisting of;
(i) acid hydrolysis performed at a temperature in the range of 25°
to 180°
C. and under a pressure of from 1 up to 25 bar;
(ii) a neutral hydrolysis performed at a pH of about 7 at a temperature in the range of 25°
to 180° and
under a pressure of from 1 up to 25 bar; and
(iii) an enzymatic hydrolysis in the presence of an enzyme having ester activity performed in a pH range of 4-9 at a temperature in the range of 25°
to 40°
C. under about atmospheric pressure; and
c) recovering the resulting hydroxy fatty acid or alkyl ester thereof from the aqueous suspension.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a process for the isolation of hydroxy fatty acid derivatives from Convolvulaceae plants like Ipomoea batatas and Ipomoea orizabensis by extracting parts of said plants like leaves, stems, seeds and in particular roots and tubers thereof, with an organic solvent, removing the solvent for at least the main part from the extract, dispersing the obtained residue into water, subjecting the obtained dispersion to a single hydrolysis step and recovering the released hydroxy fatty acids, like 11-hydroxy palmitic acid and 3,11-hydroxy myristic acid from the aqueous dispersion by means of an extraction agent. The obtained hydroxy fatty acid may be used in the synthesis of specific organic compounds like lactones or in the preparation of products having purgative properties and of thickeners for lubricating greases respectively.
12 Citations
15 Claims
-
1. In a process for the isolation of a hydroxy fatty acid or alkyl ester thereof from Convolvulaceae plants by extracting parts of said plants with an extraction agent and subsequently subjecting the extraction liquor to hydrolysis, the improvement which comprises:
-
(a) extracting the parts of the Convolvulaceae plants with an organic solvent; (b) removing the solvent from at least the main part from the extract to obtain a resinous material containing the desired hydroxy fatty acid in ester form, dispersing the thus obtained material into water and subjecting the obtained dispersion to hydrolysis to form the hydroxy fatty acid or alkyl ester, said hydrolysis selected from the group consisting of; (i) acid hydrolysis performed at a temperature in the range of 25°
to 180°
C. and under a pressure of from 1 up to 25 bar;(ii) a neutral hydrolysis performed at a pH of about 7 at a temperature in the range of 25°
to 180° and
under a pressure of from 1 up to 25 bar; and(iii) an enzymatic hydrolysis in the presence of an enzyme having ester activity performed in a pH range of 4-9 at a temperature in the range of 25°
to 40°
C. under about atmospheric pressure; andc) recovering the resulting hydroxy fatty acid or alkyl ester thereof from the aqueous suspension. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification