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1. (WO1998049175) METHOD FOR PRODUCING CARBOHYDRATE PARTIAL ESTERS

Pub. No.:    WO/1998/049175    International Application No.:    PCT/EP1998/002322
Publication Date: Fri Nov 06 00:59:59 CET 1998 International Filing Date: Tue Apr 21 01:59:59 CEST 1998
IPC: C07H 13/06
Applicants: COGNIS DEUTSCHLAND GMBH
CLAVERIE, Valérie
CECUTTI, Christine
MOULOUNGUI, Zephirin
GASET, Antoine
LE HEN FERRENBACH, Catherine
Inventors: CLAVERIE, Valérie
CECUTTI, Christine
MOULOUNGUI, Zephirin
GASET, Antoine
LE HEN FERRENBACH, Catherine
Title: METHOD FOR PRODUCING CARBOHYDRATE PARTIAL ESTERS
Abstract:
The invention relates to a method for producing carbohydrate partial esters with a degree of esterification ranging from 1 to 6 by alkali-catalyzed transesterification in the presence of emulsifiers. The inventive method comprises the following steps: a) alkali carbonates are treated with fatty acid low-alkyl esters of formula (I): R1CO-OR2 to form a catalytically active system, wherein R1CO stands for a linear or branched saturated or unsaturated acyl radical with 6 to 22 carbon atoms and R2 stands for a linear or branched alkyl radical with 1 to 5 carbon atoms, and b) the mixture thus obtained is transesterified by thoroughly stirring it with a mixture of (b1) glucose with 5 to 12 carbon atoms and (b2) carbon hydrate partial esters (as emulsifiers), resulting in an emulsion/dispersion, wherein the particles have an average diameter of 10 to 60 νm. The major advantage of the inventive method is that it considerably shortens reaction times.