METHOD OF PRODUCING HEXAFLUOROPROPYLENE OXIDE Russian patent published in 2012 - IPC C07D301/06 C07D303/08 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering and specifically to a method of producing hexafluoropropylene oxide (HFPO), which is a semi-product for synthesis of a wide range of compounds. According to the invention, HFPO is obtained via liquid-phase oxidation of hexafluoropropylene with oxygen at high temperature and pressure in a medium of a fluorine-containing solvent - perfluoropolyoxamethylene acetyl fluorides of general formula CF₃O(CF₂O)_nCF₂COF, where n=1-4, in the presence of a catalyst of a fluorine-containing organic peroxide compound (FOPC). The FOPC is separated from the hexafluoropropylene oxidation products and used in amount of 0.005-0.05 wt % with respect to "active" oxygen. Perfluoropolyoxamethylene acetyl fluorides are separated from hexafluoropropylene oxidation products by distillation and used in a mixture with polyfluorochloroalkane - freon-328, freon-113, freon-123a with content thereof of 0-30 wt %.

EFFECT: high rate, selectivity and explosion safety of the process of producing HFPO by stabilising concentration of the catalyst used, as well as reducing environmental impact by cutting use of freon-113.

3 cl, 3 tbl, 6 ex