Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1982-06-24
1983-02-15
Milestone, Norma S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
252476, C07D30110
Patent
active
043742602
ABSTRACT:
An improved method is disclosed for the vapor phase epoxidation of ethylene to ethylene oxide which includes intimately contacting an ethylene-containing feed stream with an epoxidizing amount of molecular oxygen epoxidizing agent in the presence of a catalytically effective amount of an improved catalyst comprising an inorganic porous support containing metallic silver and an effective amount of a cesium promoter which have been deposited coincidentally on the support, and, optionally, an effective amount of at least one inhibitor which retards combustion of ethylene to carbon dioxide at temperatures of from about 200.degree. C. to about 300.degree. C.
The novel silver catalyst is best described in terms of its method of preparation. The catalyst is prepared by impregnating certain inorganic porous substrates with a specific silver carboxylate/amine complex, such as silver oxalate/diethylenetriamine complex, impregnating solution containing an effective amount of a cesium salt. The impregnated support is then heated in order to evaporate volatiles, decompose the complex and activate the catalyst.
REFERENCES:
patent: 3956184 (1976-05-01), Kruglikov et al.
patent: 3962136 (1976-06-01), Nielsen et al.
patent: 4007135 (1977-02-01), Hayden et al.
patent: 4012425 (1977-03-01), Nielsen et al.
Kulason Robert A.
Milestone Norma S.
Park Jack H.
Priem Kenneth R.
Texaco Inc.
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