| 摘要 |
A process for preparing ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen in the presence of a catalytic composition whose constituent metallic elements and atomic ratio are represented by the general formula AgaBabXcTldKeCsfOg WHEREIN X represents at least one metallic element of the group consisting of tin and antimony, a, b, d, e, f and g are number of atoms of silver, barium, thallium, potassium, cesium and oxygen, respectively, and c is the sum of the number of atoms of at least one metallic element of the group consisting of tin and antimony; and when a is 100, b is a number from 0 to 100, c is a number from 0.001 to 0.15, d is a number from 0 to 0.1, e is a number from 0 to 0.1, f is a number from 0 to 0.1, with the proviso that the relationship 0<d + e + f</=0.3 is satisfied, and g is a number determined by the valence requirements of the other elements present. |
