METHOD OF INITIATING HIGHLY SELECTIVE CATALYST FOR OBTAINING ETHYLENE OXIDE Russian patent published in 2015 - IPC C07D301/10 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of initiating the process of ethylene epoxidation. The method includes the initiation of an epoxidation reaction by the interaction of a gaseous composition of initial materials in the presence of an epoxidation catalyst at the first temperature, equal to approximately 180-210°C. The first temperature is increased to the second temperature of approximately 230-290°C for a period of time of approximately 6-50 h with the simultaneous introduction of a sufficient concentration of a moderating material, so that the amount of the moderating material, adsorbed on the catalyst after achievement of the second temperature, constitutes approximately from 10 to 50 g/m³ of the catalyst. The second temperature is kept for a period of time of approximately 50-350 h with bringing the gaseous composition of initial materials to a content of approximately 0.5-25% of CO₂. The second temperature is reduced to the third temperature with the simultaneous increase of a concentration of the moderating material to the level higher than the sufficient concentration.

EFFECT: elaboration of an improved method of initiation.

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