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Vinyl acetate catalyst prepared with potassium aurate and comprising metallic palladium and gold on a carrier precoated with copper
Vinyl acetate catalyst prepared with potassium aurate and comprising metallic palladium and gold on a carrier precoated with copper
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机译:用金酸钾制备的乙酸乙烯酯催化剂,在载有铜的载体上包含金属钯和金
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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 surfaces of which is deposited catalytically effective amounts of metallic copper, palladium and gold. The catalyst is prepared by steps comprising precoating the support with a water-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, impregnating the copper and palladium containing support with a solution of potassium aurate, and reducing the potassium aurate to a catalytically effective amount of metallic gold. The inventive process results in a catalyst wherein the Pd, Cu, and Au form a shell metal distribution on the catalyst support.
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