Process for oxidation of ethylene to ethylene oxide

Details Process for oxidation of ethylene to ethylene oxide Process for oxidation of ethylene to ethylene oxide

1988-07-06

1989-06-06

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30110

Patent

active

048373478

ABSTRACT:
A supported silver catalyst selective to the formation of ethylene oxide in the reaction of ethylene with molecular oxygen is made by depositing an amount of an alkali metal sufficient to depress the activity and selectivity of the silver catalyst below that of its alkali-free state and thereafter heating the alkali metal-containing catalyst in a substantially oxygen-free atmosphere to reactivate it. In one embodiment, a large amount of alkali metal is deposited which removes substantially all activity from the silver catalyst and then activity and selectivity for oxidation of ethylene to ethylene oxide is recovered and enhanced by heating the catalyst in a nitrogen atmosphere to a temperature above 400.degree. C. for a sufficient period of time.

REFERENCES:
patent: 2404438 (1946-07-01), Evans
patent: 4168247 (1979-09-01), Hayden et al.
patent: 4774222 (1988-09-01), Rashkin

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