Patent ID: 6680392
Filing Date: 2004-01-20
Classification: C07D

Abstract:
A process for removing polyol impurities from a sorbitan ester solution comprising:(a) providing a sorbitan ester solution containing polyol impurities; (b) adding to the sorbitan ester solution from about 0.01 to about 10% actives, based on the total weight of final crude ester product formed, of a silica component at a temperature of from about 30Â° to about 80Â° C.; (c) mixing the sorbitan ester solution and silica component; (d) adsorbing the polyol impurities from the sorbitan ester solution onto the silica to form a mixture of polyol-containing silica and sorbitan ester; and (e) removing the polyol-containing silica from the sorbitan ester solution.