METHOD OF INITIATING HIGHLY SELECTIVE CATALYST FOR PRODUCING ETHYLENE OXIDE Russian patent published in 2013 - IPC C07D301/10 

FIELD: chemistry.

SUBSTANCE: method involves: contacting a catalyst bed including a silver-based highly selective epoxidation catalyst with a feed gas composition at a first temperature of about 180-220°C, said feed gas composition containing ethylene, oxygen, a chloride-containing moderator and carbon dioxide, said carbon dioxide being present in said feed gas composition in a first concentration greater than about 6 vol. %; raising the first temperature to a second temperature of about 230-270°C to obtain the desired concentration of ethylene oxide; adjusting the feed gas composition in order to maintain said desired concentration of ethylene oxide while achieving the desired efficiency and selectivity of the catalyst. The invention also relates to a method for epoxidation of ethylene.

EFFECT: efficient method of initiating a highly selective catalyst in the start-up period of the process of producing ethylene oxide, according to which the highly selective catalyst for producing ethylene oxide is first used as a standard Ag-based catalyst.

18 cl, 2 ex