Method for the production of free carboxylic acids

Details Method for the production of free carboxylic acids Method for the production of free carboxylic acids

C - Chemistry, Metallurgy

12

P

C12P 7/40 (2006.01) C07C 51/48 (2006.01) C12P 7/42 (2006.01) C12P 7/52 (2006.01)

Patent

CA 2729894

The invention relates to a process for the preparation of free carboxylic acids comprising the process steps A) preparation of carboxylic acid by a biological cell located in an aqueous medium with addition of an amine of the general formula (I) Image where R1, R2 and R3, independently of one another, are identical or different, branched or unbranched, optionally substituted hydrocarbon radicals or H, B) for cases where the added amine in process step A) is water- soluble, addition of a water-insoluble amine of the general formula (I), where, in process step A) or B), a multiphase system is obtained and the corresponding ammonium carboxylate is formed from the water-insoluble amine and the carboxylic acid, and C) removal of the water-insoluble phase and D) heating of the water-insoluble phase with release of free carboxylic acid.

L'invention a pour objet un procédé de production d'acides carboxyliques libres, procédé comprenant les étapes suivantes : A) production d'acide carboxylique par une cellule biologique se trouvant dans un milieu aqueux, avec addition d'une amine de formule générale (I), dans laquelle R1, R2 et R3 désignent, indépendamment l'un de l'autre, des restes hydrocarbures identiques ou différents, ramifiés ou non ramifiés, éventuellement substitués, ou un H; B) dans le cas où l'amine ajoutée dans l'étape A) est soluble dans l'eau, addition d'une amine insoluble dans l'eau, de formule générale (I); cependant qu'on obtient dans l'étape (A), respectivement, B), un système multiphase, et qu'il se forme, à partir de l'amine insoluble dans l'eau et de l'acide carboxylique, le carboxylate d'ammonium correspondant; et C) séparation de la phase insoluble dans l'eau; et D) chauffage de la phase insoluble dans l'eau, avec libération de l'acide carboxylique libre.

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