METHOD OF PREPARING PERFLUORINATED EPOXIDES Russian patent published in 2000 - IPC

FIELD: preparation of some valuable organofluorine products. SUBSTANCE: perfluorinated epoxides are prepared by oxidation of corresponding olefins with oxygen at 15-120 C in the presence of chlorine fluorine, bromine, trifluoromethyl hypofluorite, tetrafluoroethylene in coolant or fluorochlorocarbon liquid. Gaseous olefin is introduced into stream of oxidizer under layer of inert solvent. Yield of hexafluoropropylene is 77% at conversion of 78%, and yield of tetrafluoroethylene oxide is 87% at conversion of 93%. Method makes it possible to increase yield of fluorinated epoxides and increase conversion of original olefins and to create reliable industrial technology for preparing perfluoroolefin oxides. EFFECT: more efficient preparation method. 5 cl, 12 ex, 1 tbl