B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/85, 260/372.
B01J 23/96 (2006.01) B01J 23/50 (2006.01) C07D 301/10 (2006.01)
Patent
CA 1152973
Abstract: HOE 79/F 919 Process for improving the activity of supported silver catalysts Supported silver catalysts, which should have as high an activity as possible, are employed for the manu- facture of ethylene oxide by oxidizing ethylene by means of oxygen or air. A process is described for improving the activity of supported silver catalysts which have already been used, in which the used catalyst is first washed with an inert liquid containing ammonia and/or aliphatic amines and 1 to 1,000 parts, per 1 million parts of catalyst, of cesium, rubidium or a mixture thereof is then deposited on the washed catalyst. The deposition is generally effected with the aid of an impregnating solution containing the cesium and/or rubidium compounds in a suitable quantity. This process makes it possible to improve considerably the activity of supported silver catalysts which have already been in use for the oxidation of ethylene by means of oxygen or air.
360614
Alfranseder Josef
Mayer Sigmund
Rebsdat Siegfried
Riedl Josef
Schaffelhofer Iwo
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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