METHOD OF IMPROVING SELECTIVITY OF CATALYST AND A OLEFIN EPOXIDATION PROCESS Russian patent published in 2008 - IPC B01J37/08 B01J32/00 B01J37/14 B01J23/50 B01J23/68 C07D301/10 

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: method of improving selectivity of highly selective epoxidation catalyst on support containing silver in amount at most 0.19 g per 1 m2 of the support surface area comprises bringing catalyst or catalyst precursor containing silver in cationic form into contact with oxygen-containing raw material at catalyst temperature above 250°C over a period of time more than 150 h, after which catalyst temperature is lowered to at most 250°C. Olefin epoxidation process comprises bringing above-described supported catalyst or catalyst precursor into contact with oxygen-containing raw material at catalyst temperature above 250°C over a period of time more than 150 h, after which catalyst temperature is lowered to at most 250°C and catalyst is brought into contact with raw material containing olefin and oxygen.

EFFECT: increased selectivity of catalyst.

12 cl, 3 tbl, 12 ex