PROCESS FOR REACTIVATING SILVER CATALYSTS IN THE MANUFACTURE OF ETHYLENE BY CT OXIDATION

摘要

PROCESS FOR REACTIVATING SILVER CATALYSTS USED IN THE MANUFACTURE OF ETHYLENE OXIDE BY DIRFCT OXIDATION of the disclosure: The efficiency of supported silver 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.