Process for preparing carboxylic acids

Details Process for preparing carboxylic acids Process for preparing carboxylic acids

C - Chemistry, Metallurgy

07

C

C07C 227/02 (2006.01) C07C 51/16 (2006.01) C07F 9/38 (2006.01) C07C 229/12 (2006.01) C07C 229/16 (2006.01) C07C 229/22 (2006.01)

Patent

CA 2343962

Aliphatic primary alcohols, including aliphatic primary alcohols possessing one or more oxygen, nitrogen and/or phosphorus heteroatoms that may be atoms substituting for carbon atoms in the alkyl group or component atoms of substituents on the alkyl group, were converted into salts of carboxylic acids by contacting an alkaline aqueous solution of the primary alcohol with a catalyst comprising cobalt, copper, and at least one of cerium, iron, zinc, and zirconium. Diethanolamine, for example, was converted to sodium iminodiacetate by treatment in an aqueous medium containing sodium hydroxyde with a catalyst that was obtained by reducing a mixture of cobalt, copper, and zirconium oxides with hydrogen.

Selon cette invention, des alcools primaires aliphatiques, y compris les alcools primaires aliphatique possédant un ou plusieurs hétéroatomes d'oxygène, d'azote et/ou de phosphore, qui peuvent être des atomes remplaçant les atomes de carbone dans le groupe alkyle, ont été transformés en des sels d'acides carboxyliques par le contact avec une solution alcaline aqueuse d'un alcool primaire avec un catalyseur comprenant le cobalt, le cuivre et au moins un des éléments suivants: cérium, fer, zinc et zirconium. On a, par exemple, transformé la diéthanolamine en iminodiacétate de sodium par le traitement dans un milieu aqueux contenant de l'hydroxyde de sodium avec un catalyseur obtenu par la réduction d'un mélange de cobalt, de cuivre et d'oxydes de zirconium avec de l'hydrogène.

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