Process for reactivating silver catalysts used in the manufactur

Details Process for reactivating silver catalysts used in the manufactur Process for reactivating silver catalysts used in the manufactur

1976-04-27

1977-09-27

Douglas, Winston A.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252414, 26034823, B01J 2396, C07D30110, C07D30304

Patent

active

040510689

ABSTRACT:
The efficiency of silver carrier catalysts having reduced activity for the manufacture of ethylene oxide by reacting ethylene with oxygen or air is improved by impregnating the used catalyst with a solution containing cesium and/or rubidium compounds, an aliphatic alcohol and at most 10% by weight of water. After impregnation the alcohol and optionally the water are evaporated. The cesium and/or rubidium content of the impregnating solution and the number of impregnations are adjusted to obtain on the carrier a cesium and/or rubidium concentration of from 1 to 1,000 ppm.

REFERENCES:
patent: 2615899 (1952-10-01), Sears, Jr.
patent: 2687380 (1954-08-01), Saffer
patent: 3899445 (1975-08-01), Kajimoto et al.
patent: 3962136 (1976-06-01), Nielson

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