| 摘要 |
A method for the preparation of a high activity palladium metal based catalyst having the formula PdTeaZnd Ee where E is one or more metals from the group IIA, IVA, VA, IB, VIIB or VIII; and a, d and e are from about 0 to 3, with the proviso that at least d or e NOTEQUAL 0. The method comprises the step of forming an aqueous solution of a palladium compound, adding to the solution a powder of a reducing metal more electropositive than palladium and reducing the palladium to its metallic state on the surface of the reducing metal and, separating the resulting catalyst from the solution. Catalysts prepared according to this method are useful for producing esters from aldehydes and alcohols and provide greater conversions to the ester than catalysts prepared by previous processes.
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