Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1996-05-24
1997-12-23
Caldarola, Glenn
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502325, 502344, B01J 2344, B01J 2352
Patent
active
057007535
ABSTRACT:
This invention provides a heterogeneous bimetallic palladium-gold catalyst for vinyl acetate production from ethylene, acetic acid and oxygen. An invention catalyst is prepared by forming a first shell dispersion coating of colloidal palladium on the catalyst support surface, and super-imposing a second shell dispersion coating of colloidal gold metal on the catalyst support surface. An organometallic gold compound is employed to apply the gold dispersion on the catalyst support surface. The organometallic gold compound does not require a fixing procedure, which normally is the cause of low gold metal retention. A preferred invention palladium-gold catalyst has a high gold metal retention, and exhibits durability and long term selectivity in vinyl acetate production.
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Broussard Jerry A.
Wang Tao
Caldarola Glenn
Cassady Donald R.
Hoechst Celanese Corporation
Preisch Nadine
Spiering M. Susan
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