Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1993-05-21
1994-08-09
Shippen, Michael L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C07C 6705
Patent
active
053368029
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 The oxidizing agent is withdrawn and an inert gas such as nitrogen is introduced.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 again at a temperature up to 500.degree. C. in the presence of a reducing agent such as hydrogen or ethylene. Improvements 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.
Quantum Chemical Corporation
Shippen Michael L.
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