Production process for catalyst
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United States of America Patent
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Issued Date -
Oct 20, 2005
app pub date -
Apr 13, 2005
filing date -
Apr 14, 2004
priority date (Note) -
Abandoned
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Abstract
A production process for a catalyst that supports a noble metal, and an alkali metal compound and/or alkali earth metal compound, useful for synthesis of vinyl acetate is provided. The process includes (a) impregnating a carrier with an aqueous solution of a water soluble noble metal compound, and (b) converting the noble metal compound into a water insoluble noble metal compound, and the noble metal compound is reduced, followed by supporting an alkali metal compound and/or alkali earth metal compound. An element that oxidizes to produce an amphoteric oxide is brought into contact with the carrier at the step (a) and/or the step (b). This process is advantageous in facilities required and the associated running costs for production of an eggshell-type structure catalyst, which offers a high level of catalytic activity, and enables the production of vinyl acetate with a high space-time yield.
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