CATALYST, PROCESS FOR PRODUCING THE CATALYST AND PROCESS FOR PREPARING VINYL ACETATE USING THE CATALYST

摘要

THE PRESENT PROCESS ALLOWS THE PRODUCTION OF A CATALYST FOR PREPARING VINYL ACETATE IN THE GAS PHASE FROM ETHYLENE, ACETIC ACID AND OXYGEN OR OXYGEN-CONTAINING GASES. THE CATALYST COMPRISESD PALLADIUM AND/OR ITS COMPOUNDS, GOLD AND/OR IS COMPOUND AND ALSO ALKALI METAL COMPOUNDS ON A PARTICULATE, POROUS SUPPORT AND IS OBTAINED BY A)IMPREGNATING THE SUPPORT WITH SOLUBLE PALADIUM AND GOLD COMPOUNDS, @B)CONVERTING THE SOLUBLE PALLADIUM AND GOLD COMPOUND INTO INSOLUBLE PALLADIUM AND GOLD COMPOUNDS BY ADDITION OF AN ALKALINE SOLUTION TO THE SUPPORT, @C)REDUCING THE ISOLUBLE PALLADIUM AND GOLD COMPOUNDS ON THE SUPPORT BY MEANS OF A REDUCING AGENT IN THE LIQUID OR GASEOUS PHASE, @D)IMPREGNATION THE SUPPORT WITH AT LEAST ONE SOLUBLE ALKALI METAL COMPOUND AND @E)FINALLY DRYING THE SUPPORT AT A MAXIMUM OF 150o C, WHEREIN THE CATALYST IS BROUGHT INTO CONTACT WITH AT LEAST ONE PEROXIDIC COMPOUND IN STEP B).