Selective esterification of long chain fatty acid...

C - Chemistry – Metallurgy – 11 – C

Patent

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C11C 3/04 (2006.01) C07C 67/08 (2006.01) C11B 3/00 (2006.01) C11C 3/02 (2006.01) C11C 3/08 (2006.01)

Patent

CA 2069885

A process for the selective esterification of long chain length fatty acid monoglycerides, particularly monobehenin, with medium chain length fatty acid anhydrides, particularly a mixture of C8 and C10 saturated fatty acid anhydrides is disclosed. In this process, an at least about 60 % pure C18-C24 fatty acid monoglyceride or mixture thereof is esterified with an at least about 50 % pure C6-C10 fatty acid anhydride or mixture thereof at a temperature of from about 90° to about 190 °C in the substantial absence of an esterification catalyst. The mole ratio of fatty acid anhydride to monoglyceride used in this monoglyceride esterification is at least about 2:1.

On dévoile un procédé pour l'estérification sélective de monoglycérides d'acides gras à longue chaîne, particulièrement de monobéhénine, avec des anhydrides d'acides gras à chaîne moyenne, particulièrement un mélange d'anhydrides d'acides gras saturés en C8 et C10. Dans ce procédé, un monoglycéride d'acide gras en C18-C24 pur à au moins environ 60 % ou un mélange de tels monoglycérides est estérifié avec un anhydride d'acide gras en C6-C10 pur à au moins environ 50 % ou avec un mélange de tels anhydrides à une température d'environ 90 à 190 degrés C en absence substantielle de catalyseur d'estérification. Le rapport molaire de l'anhydride d'acide gras au monoglycéride utilisé dans cette estérification de monoglycéride est au moins environ 2:1.

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