Patent ID: 9228212
Filing Date: 2016-01-05
CPC Classification: C11C,C12P,Y02E

Claim Text:
1. A method for producing ricinoleic acid (RA) ester from castor oil comprising the following steps: i) transesterifying in a enzymatic transesterification reaction, carried out in the presence of a lower aliphatic alcohol selected from the group consisting of methanol, ethanol, isopropanol, and n-propanol and of the lipase extracted from wherein the lipase extracted from wherein the reaction temperature during the use of said lipase extracted from wherein the reaction time is at most 1 hour, the lipase/substrate ratio is at least 0.5% w/w, and the substrate/alcohol ratio ranges from 1:4.5 to 1:0.75 the alcohol being added in one or more additions; ii) separating said mixture M into at least two fractions, including a fraction A enriched with RA glycerides, and a fraction B rich in esters of fatty acids other than RA; and iii) converting said RA glycerides contained in the fraction A into RA esters so as to form a fraction C rich in RA esters and a fraction rich in alcohols.