VINYL ACETATE CATALYST PREPARED WITH POTASSIUM AURATE AND COMPRISING METALLIC PALLADIUM AND GOLD ON A CARRIER PRECOATED WITH COPPER

摘要

A CATALYST FOR THE PRODUCTION OF VINYL ACETATE BY REACTION OF ETHYLENE , OXYGEN AND ACETIC ACID, COMPRISING A POROUS SUPPORT ON THE POROUS SURFACE OF WHICH IS DIPOSITED CATALYTICALLY EFFECTIVE AMOUNTS OF METALLIC COPPER, PALLADIUM AND GOLD. THE CATALYST IS PREPARED BY STEPS COMPRISING PRECOATING THE SUPPORT WITH A WATWE -INSOLUBLE FORM OF COPPER, FORMING ON THE PRECOATED SUPPORT A WATER- INSOLUBLE PALLADIUM COMPOUND, REDUCING THE PALLADIUM COMPOUND, AND, IF NOT PREVIOUSLY REDUCED, THE WATER- INSOLUBLE FORM OF COPPER, TO A CATALYTICALLY EFFECTIVE AMOUNT OF THE FREE METAL, IMPREGNETING THE COPPER AND PALLADIUM CONTAINING SUPPORT WITH A SOLUTION OF POTASSIUM AURATE, AND REDUCING THE POTASSIUM AURATE TO A CATALYTICALLY EFFECTIVE AMOUNT OF METTALLIC GOLD. THE INVENTIVE PROCESS RESULTS IN A CATALYST WHEREIN THE PD, CU AND AU FORM A SHLL METAL DISTRIBUTION ON THE CATALYST SUPPORT.