| 摘要 |
A catalyst for the production of ethylene oxide which contains silver, tungsten, cesium and, in some cases, an alkaline metal other than cesium, an alkaline-earth metal, a rare-earth metal, and/or metal selected from Groups I B, II B, III B, IV A, IV B, V A, V B and VI A of the Periodic Table and tellurium. The components are uniformly deposited on a porous carrier. The loadings of silver, of tungsten and of cesium on the outside surface layer and on the innermost layer of the catalyst satisfy certain formulas. The use of the catalyst of this invention provides high selectivity in the production of ethylene oxide by the vapor contact oxidation of ethylene. |
