Recovery of carboxylic acid from organic solution that...

Details Recovery of carboxylic acid from organic solution that... Recovery of carboxylic acid from organic solution that...

C - Chemistry, Metallurgy

07

C

C07C 51/48 (2006.01) C07C 59/265 (2006.01)

Patent

CA 2189246

Recovery of carboxylic acid from an amine-based, water-immiscible organic extractant solution thereof that contains an extraction enhancer, by extraction of acid into an aqueous phase. In a preliminary step the enhancer is removed from the extractant solution by extraction with an aqueous solution containing at least 50 % by weight of a salt of the carboxylic acid present in the extractrant. The process is applicable to the recovery of carboxylic acid from a fermentation broth.

L'invention se rapporte à la récupération de l'acide carboxylique contenu dans une solution de cet acide avec un agent d'extraction, organique, immiscible dans l'eau, à base d'amine, solution qui contient un activateur d'extraction, ce procédé consistant à extraire l'acide en phase aqueuse. Dans une étape préliminaire, on retire l'activateur de la solution de l'agent d'extraction en l'extrayant à l'aide d'une solution aqueuse contenant au moins 50 % en poids d'un sel d'acide carboxylique présent dans l'agent d'extraction. Ce procédé peut s'appliquer à la récupération de l'acide carboxylique contenu dans un bouillon de fermentation.

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