Process for removing polysorbitols from sorbitan esters

Details Process for removing polysorbitols from sorbitan esters Process for removing polysorbitols from sorbitan esters

C - Chemistry, Metallurgy

07

D

C07D 307/02 (2006.01) C07D 307/20 (2006.01)

Patent

CA 2305197

A process for removing polyol impurities from a sorbitan ester solution involving: (a) providing a sorbitan ester solution containing polyol impurities; (b) adding to the sorbitan ester solution a clarifying-effective amount of a silica component; (c) adsorbing the polyol impurities from the sorbitan ester solution onto the silica to form a mixture of sorbitan ester and polyol-containing silica; and (d) removing the polyol-containing silica from the sorbitan ester solution.

Ce procédé, qui sert à éliminer les impuretés polyol contenues dans une solution d'ester de sorbitane, consiste: (a) à prendre une solution d'ester de sorbitane contenant des impuretés polyol; (b) à ajouter à cette solution d'ester de sorbitane un composé à base de silice en quantité suffisante pour produire une clarification; (c) à adsorber les impuretés polyols de la solution d'ester de sorbitane sur la silice, afin de former un mélange d'ester de sorbitane et de silice à teneur en polyol; et (d) à éliminer la silice à teneur en polyol de la solution d'ester de sorbitane.

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