Process for making carboxylic acid esters

Details Process for making carboxylic acid esters Process for making carboxylic acid esters

C - Chemistry, Metallurgy

07

C

C07C 35/02 (2006.01) C07C 27/02 (2006.01) C07C 27/04 (2006.01) C07C 29/12 (2006.01) C07C 29/149 (2006.01) C07C 67/56 (2006.01) C11C 3/00 (2006.01)

Patent

CA 2322328

Sulfur and soap contaminants are removed from carboxylic acid esters by a process comprising the steps of: (1) contacting a carboxylic acid ester with an aqueous base at a temperature of from about 225 ~F to about 280 ~F while removing water to form a dry, crude ester; (2) contacting the dry, crude ester with an absorbent selected from the group consisting of silica gel, hydro- silica gel and mixtures thereof; (3) separating the absorbent from the ester.

L'invention concerne un procédé permettant d'éliminer des contaminants tels que le soufre et le savon d'esters d'acide carboxylique. Ce procédé consiste à (1) mettre en contact un ester d'acide carboxylique avec une base aqueuse, à une température comprise entre environ 225 ·F et 280 ·F tout en éliminant l'eau de manière à former un ester sec, brut; (2) à mettre en contact l'ester sec, brut avec un absorbant sélectionné dans le groupe constitué par un gel de silice, un gel d'hydro-silice et des mélanges de ceux-ci; (3) à séparer l'absorbant de l'ester.

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