Method for separating a palladium catalyst

Details Method for separating a palladium catalyst Method for separating a palladium catalyst

B - Operations, Transporting

01

J

B01J 31/40 (2006.01) B01J 38/60 (2006.01) C07C 51/14 (2006.01) C07C 51/42 (2006.01) C07C 51/48 (2006.01) C07C 57/03 (2006.01)

Patent

CA 2226302

A method for separating a palladium catalyst from the medium in which it dissolved is disclosed. Specifically, the method is useful for separating a palladium catalyst from a medium resulting from a butadiene hydroxycarbonylation reaction producing pentenoic acids. The method therefore comprises at least partially separating the palladium dissolved in a solution that also contains 3-pentenoic acid, and is characterised in that said solution is acidified and stirred with an aqueous hydrochloric acid solution and in that two liquid phases are produced, including an aqueous phase containing all or part of the palladium.

La présente invention concerne la séparation d'un catalyseur à base de palladium, à partir d'un milieu dans lequel il est dissous. Plus spécifiquement, l'invention concerne la séparation d'un catalyseur à base de palladium, à partir d'un milieu provenant de la réaction d'hydroxycarbonylation du butadiène en acides penténoïques. Elle consiste donc en un procédé de séparation d'au moins une partie du palladium dissous dans une solution contenant aussi au moins de l'acide 3-penténoïque, caractérisé en ce que ladite solution est acidifiée et agitée avec une solution aqueuse d'acide chlorhydrique et en ce que l'on obtient deux phases liquides dont une phase aqueuse contenant au moins une partie du palladium.

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