METHOD OF EPOXIDATION OF OLEFIN-UNSATURATED COMPOUNDS Russian patent published in 2015 - IPC C07D301/12 

FIELD: chemistry.

SUBSTANCE: method includes reaction in the first multiphase system of an olefin-unsaturated compound with an oxidant in the presence of a buffer component and a water-soluble manganese complex, which is in a water phase having the first level of pH, constituting from more than 2.5 to 6 in the first multiphase system; regulation of the water phase pH to the second pH level lower than the first pH level which constitutes 2.5 or less; separation of, at least, a part of the water phase from the first multiphase system; regulation of pH of the said, at least, a part of the water phase to the third pH level higher than the second pH level and constituting from more than 2.5 to 6; and introduction of the said, at least, a part of the water phase into the second multiphase system.

EFFECT: preservation of the catalyst activity in the process of epoxidation.

11 cl, 3 dwg, 7 tbl