VERFAHREN ZUR VERBESSERUNG DER WIRKSAMKEIT VON GEBRAUCHTEN SILBER-TRAEGERKATALYSATOREN

摘要

The activity of supported silver catalysts, which have been used for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air and to which from 1 to 1,000 parts, per 1 million parts of catalyst, of cesium and/or rubidium have been applied, is improved by washing the catalyst with an inert liquid prior to the application of cesium and/or rubidium.