Improved carboxylic acid purification and crystallization...

Details Improved carboxylic acid purification and crystallization... Improved carboxylic acid purification and crystallization...

C - Chemistry, Metallurgy

07

C

195/131, 204/53,

C07C 51/43 (2006.01) C07C 55/10 (2006.01) C12P 7/46 (2006.01) C25B 3/00 (2006.01)

Patent

CA 2022037

A process for preparing a carboxylic acid of high purity comprises preparing an undersaturated solution of a salt of the carboxylic acid; subjecting the undersaturated salt solution to water-splitting electrodialysis to form base and a supersaturated solution of the carboxylic acid; and, then crystallizing the carboxylic acid from the supersaturated solution. In the preferred embodiment, the undersaturated solution is a fermentation broth containing sodium succinate and sodium acetate and the carboxylic acid obtained is succinic acid.

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