Process for improving the activity of used supported silver...

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B01J 23/66 (2006.01) B01J 23/96 (2006.01) C07D 301/10 (2006.01)

Patent

CA 1093056

HOE 76/F 923 PROCESS FOR IMPROVING THE ACTIVITY OF USED SUPPORTED SILVER CATALYSTS Abstract of the disclosure: The activity of supported silver catalysts for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air is improved by applying to the catalyst from 1 to 1,000 ppm, preferably 20 to 500 ppm, of cesium and/or rubidium in two or more than two steps and using the catalyst after each impreg- nation step again for the production of ethylene oxide by direct oxidation of ethylene with molecular oxygen or air.

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