Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1984-05-14
1985-11-26
Gantz, D. E.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502170, 502171, 502347, 502348, 549534, B01J 2900, B01J 3112, B01J 2302, C07D30104
Patent
active
045555010
ABSTRACT:
A supported silver catalyst for the oxidation of ethylene to ethylene oxide with molecular oxygen is made by impregnating a support with a hydrocarbon solution of a silver salt of a neo-acid having 7 or more carbon atoms, substantially free of water and said neo-acid. Preferably, the hydrocarbon solvent is toluene, xylene, ethyl benzene, cyclohexane, or cumene. The impregnated support is dried and the silver is activated under conditions chosen to provide the optimum selectivity to ethylene oxide. Thereafter, the activated silver catalyst may be impregnated with an alkali metal solution sufficient to increase selectivity of the silver catalyst above its alkali-free state. The amount of alkali metal on the finished catalyst is the optimum for the particular support selected and preferably will be about 1-6.times.10.sup.-3 gew/kg of catalyst. The catalyst may also include additional promoters, such as the alkaline earth metals, preferably barium.
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McKim & Cambron, Canadian Journal of Research, vol. 27, Sec. B, No. 11, pp. 815-816, "The Catalytic Oxidation of Ethylene to Ethylene Oxide".
Gantz D. E.
Long William C.
Stewart Riggs T.
The Halcon SD Group, Inc.
Wells Harold N.
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