Verfahren zur Herstellung von Vinylacetat

1,234,046. Oxidation catalysts. ASAHI KASEI KOGYO K.K. 14 June, 1968 [7 Sept, 1967; 26 March, 1968], No. 28396/68. Heading B1E. [Also in Division C2] A catalyst composition comprises a carrier upon which are supported (A) at least one member selected from the metals ruthenium, rhodium, palladium, iridium and platinum, (B) at least one member selected from the metals zinc, cadmium and uranium and the oxides, chlorides, formates and acetates thereof, (C) at least one member selected from the chlorides and bromides of the metals lithium, sodium, potassium, rubidium and caesium and (D) at least one member selected from the acetates of the metals lithium, sodium, potassium, rubidium and caesium. The carrier may be active carbon, silicon carbide, silica, silica-alumina alumina, alumina-boria, boria or titania. The atomic ratios (A):(B), (A):(C) and (A):(D), expressed in terms of the metals, preferably are 1:0.01 to 100, 1:0.1 to 100 and 1:0.1 to 100, respectively. Numerous catalyst compositions, together with methods for the preparation thereof, are disclosed in the Specification in which reference also is made to various priorart catalyst compositons. The catalyst compositions may be used in the prepartion of vinyl acetate by a process which comprises subjecting a gas mixture containing ethylene, acetic acid and a molecular oxygen-containing gas to a catalytic gas phase reaction at a temperature of from 50‹C to 300‹C.