Solvent-free production of carbohydrate partial esters for use in cosmetics, pharmaceuticals and food involves transesterification of glycoses with fatty acid esters in presence of emulsifiers and an alkali catalyst mixture

摘要

Solvent-free production of carbohydrate partial esters of average esterification degree 1-4 in presence of an alkali metal carbonate/alkali metal hypophosphite catalyst mixture is effected by transesterification of glycoses with fatty acid esters in presence of emulsifiers and a specified catalyst mixture. Solvent-free production of carbohydrate partial esters of average esterification degree 1-4 in presence of an alkali metal carbonate/alkali metal hypophosphite catalyst mixture is effected by the following steps optionally under a protective gas atmosphere (A) forming a catalytically- active system by mixing (ai) an alkali metal carbonate with (aii) a fatty acid alkyl ester of formula R 1>CO-R 2> (I; R 1>CO = 6-30C optionally branched, optionally unsaturated acyl and R 2> = 1-5C alkyl); (B) adding to the resulting mixture under constant stirring (bi) 5-12C glycoses, (bii) carbohydrate partial esters as emulsifiers and (biii) alkali metal hypophosphite so as to give a dispersion from which water is drawn off under constant stirring at up to 100[deg]C at up to 50 mbar; and (C) effecting esterification at up to 50 mbar and up to 125[deg]C under constant stirring until the content of the fatty acid ester (I) has fallen to at least 8 wt.% of the total composition. An independent claim is also included for shaped bodies comprising (1) the carbohydrate partial ester; (2) a suitable emollient for foodstuffs and/or cosmetics; (3) 1-10 wt.% of a 16-40C fatty alcohol or a mixture of such fatty alcohols; and (4) up to 20 wt.% further additives.