Process f r the removal of catalytic metals and promoter...

C - Chemistry – Metallurgy – 07 – C

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C07C 51/47 (2006.01) B01J 45/00 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2566795

A process for the selective removal of Group VIII carbonylation catalyst metals and/or promoter metals from liquid compositions comprising a carbonylation product, the Group VIII carbonylation catalyst metals and/or promoter metals, corrosion metals and optionally alkali or alkaline earth metals. The process comprises contacting the liquid composition with a chelating resin having thiourea functional groups. The process is suitable for treating process streams obtained in the production of carboxylic acids and/or carboxylic anhydrides.

Un procédé destiné à l'élimination sélective des métaux catalyseurs de carbonylation et/ou métaux collecteurs du Groupe VIII dans les compositions liquide qui comprennent un produit de la carbonylation, les métaux catalyseurs de carbonylation et/ou les métaux collecteurs du Groupe VIII, les métaux de corrosion et éventuellement les alcalins ou les métaux terreux alcalins. Le procédé comprend la mise en contact de la composition liquide avec une résine chélatante contenant des groupes fonctionnels thio-urée. Le procédé convient au traitement des liquides obtenus au cours de la production d'acides carboxyliques et/ou d'anhydrides carboxyliques.

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