Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1991-12-05
1993-03-16
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
B01J 2352, B01J 2344
Patent
active
051944170
ABSTRACT:
A method for pretreatment of a palladium-gold catalyst useful in the synthesis of vinyl acetate. A virgin catalyst, following reduction to the metallic palladium and gold, is first heated at elevated temperatures in the presence of an oxidizing agent such as air. The oxidizing agent is withdrawn and an inert gas such as nitrogen is introduced. The catalyst is heated against at a temperature up to 500.degree. C. in the presence of a reducing agent such as hydrogen or ethylene. Improvement in selectivity and yield are obtained.
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Augustine Steve M.
Hanes Ronnie M.
Scheben John A.
Smith David W.
Heidrich William A.
McGinty Douglas J.
Quantum Chemical Corporation
Shine W. J.
Tremain Kenneth D.
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