Trans-acidolysis process for the preparation of carbohydrate...

Details Trans-acidolysis process for the preparation of carbohydrate... Trans-acidolysis process for the preparation of carbohydrate...

2005-01-25

2005-01-25

Wilson, James O. (Department: 1623)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C536S018500, C536S115000, C536S116000, C536S119000, C536S120000, C536S124000

Reexamination Certificate

active

06846916

ABSTRACT:
The present invention relates to a low temperature, solvent-free trans-acidolysis process for preparing surface-active carbohydrate fatty-acid esters comprising the steps of:(e) reacting acylated carbohydrate with free fatty acid in the presence of acid catalyst, under reduced pressure, and without adding any solvent;(f) decolorizing and separating the reaction mixture obtained in step (a) into unreacted fatty acid layer and a carbohydrate fatty-ester layer;(g) precipitating out the unreacted acylated carbohydrate;(h) librating the hydroxyl groups by partial hydrolysis in the presence of an acid catalyst;(i) removing the unreacted free fatty acids and unreacted carbohydrate esters of low molecular-weight carboxylic acids during purification, and recycling the removed unreacted free fatty acids and carbohydrate esters to the starting reactant mixture.

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