Modified support materials for catalysts

B - Operations – Transporting – 01 – J

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Details

B01J 23/52 (2006.01) B01J 23/68 (2006.01) C07C 67/055 (2006.01) C07C 69/01 (2006.01)

Patent

CA 2586584

The present invention relates to a method of producing a catalyst or pre- catalyst suitable for assisting in the production of alkenyl alkanoates. The method includes contacting a modifier precursor to a support material to form a modified support material. One or more catalytic component precursors (palladium or gold) may be contacted to the modified support material. The atomic ratio of gold to palladium is preferably in the range of about 0.3 to about 0.90. The support materials with the catalytic component may then be reduced using a reducing environment. A composition for catalyzing the production of an alkenyl alkanoates including a modified support material with palladium and gold is also included within the invention. Catalysts of the present invention may be used to produce alkenyl alkanoates in general and vinyl acetate in particular and are useful to produce low EA/VA ratios while maintaining or improving CO2 selectivity.

L'invention concerne un procédé permettant de produire un catalyseur ou un pré-catalyseur pouvant aider à la production de alcanoates d'alcényle. Ce procédé consiste à mettre un précurseur de modificateur en contact avec un matériau de support afin de former un matériau de support modifié. Un ou plusieurs précurseurs de composants catalytiques (palladium ou or) peuvent être mis en contact avec le matériau de support modifié. De préférence, le ratio atomique or-palladium est compris entre environ 0,3 et environ 0,90. Les matériaux de support comprenant le composant catalytique peuvent être réduits au moyen d'un environnement de réduction. L'invention concerne également une composition servant à catalyser la production d'alcanoates d'alcényle comprenant un matériau de support modifié comprenant du palladium ou de l'or. Les catalyseurs selon l'invention, qui peuvent être utilisés pour produire les alcanoates d'alcényle en général et de l'acétate de vinyle en particulier, sont utiles pour produire de faibles ratios EA/VA tout en maintenant ou en améliorant la sélectivité de CO2.

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