Selective esterification of long chain fatty acid...

C - Chemistry – Metallurgy – 11 – C

Patent

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Details

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

Patent

CA 2071220

A process for the selective esterification of long chain length fatty acid monoglycerides, particularly monobehenin, with medium chain length fatty acids, particularly a mixture of C8 and C10 saturated fatty acids, 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 90 % pure C6-C10 fatty acid or mixture thereof at a temperature of from about 140° to about 250°C in the substantial absence of an esterification catalyst. The mole ratio of fatty acid to monoglyceride used in this monoglyceride esterification is at least about 3:1. Water generated during this monoglyceride esterification is also continuously removed.

L'invention a pour objet un processus d'estérification sélective de monoglycérides d'acides gras à longue chaîne particulièrement monobéhénine, avec des acides gras à chaîne moyenne, particulièrement un mélange d'acides gras saturés C8 et C10. Dans ce processus, un monoglycéride d'acide gras C18-C24 pur à au moins 60 % ou un mélange de celui-ci est estérifié avec un acide gras C6-C10 pur à au moins 90 % ou un mélange de celui-ci, à une température située entre 140 et 250 C environ en l'absence totale d'un catalyseur d'estérification. La proportion molaire de l'acide gras par rapport au monoglycéride utilisé dans cette estérification de monoglycéride est au moins 3:1 approximativement. L'eau produite pendant cette estérification de monoglycéride est également éliminée continuellement.

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