ZIRCONIA CONTAINING SUPPORT MATERIAL FOR CATALYSTS

摘要

The present invention addresses at aeast four different aspects relating to catalyat structure, method of making those catalysts and methods of using those catalysts for making allcenyl alkanoates. Separately or together in combination, the various aspects of the invention are directed at improving the production of alkenyl alkanoates and VA in particular, including reduction of by-products and improved production efficiency. A first aspect of the presente invention pertains to a unique palladium/gold catalyst or pre-catalyst (optionally calcined) that includes rhodium or another metal. A second aspect pertains to a palladium/gold catalyst or precatalyst at is based on a layered support material where one layer of the support materiel is substantially free of catalytic components. A third aspect pertains to a palladium/gold catalyst or precatalysts on a zirconia containing support material. A fourth aspect pertains to a palladium gold catalyst or pre-catalyst that is produced from substantially chloride free catalytic components.