WERKWIJZE VOOR HET REACTIVEREN VAN GEBRUIKTE ZILVERKATALYSATOREN VOOR HET BEREIDEN VAN ETHYLEENOXYDE VOLGENS HET DIRECTE OXYDATIE- PROCEDE.

摘要

The efficiency of silver carrier 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.