VERFAHREN ZUR VERBESSERUNG DER WIRKSAMKEIT VON SILBERTRAEGERKATALYSATOREN

摘要

1. A process for improving the efficacy of supported silver catalysts for the production of ethylene oxide by reacting ethylene with oxygen or air, in which 1 to 1.000 mg of cesium per kg of catalyst are applied to said catalyst to be improved by impregnating the catalyst with a solution containing a cesium compound at a temperature from 60 to 200 degrees C and separating the excess of impregnating solution from the impregnated catalyst, characterised in that an impregnating solution is used which contains the cesium essentially as cesium methylate, cesium ethylate, cesium propylate and/or cesium isopropylate and the impregnation is carried out at a temperature from 80 to 180 degrees C.