METHOD OF SIMPLE PERFLUOROPOLYESTER PRODUCING Russian patent published in 1998 - IPC

FIELD: chemical technology. SUBSTANCE: invention relates to the improved method of synthesis of polyperfluoroesters of the general formula TO- where T - where Y″ - F, Cl; Y′ - Cl, Br; R¹ = R² - F; m = 0 or 1.6-2.9; n = 0 and 5.6-6.2; p = 0 or 0.07-0.2; q = 0 or 0.4-0.5. Reagent 1: perfluoropropene or perfluoroethylene. Reagent 2: gaseous oxygen. Reaction conditions: photooxidation is carried out in liquid phase with gaseous chlorine for two stages at (-40)-(-80) C under UV-irradiation in the presence of fully halogenated ethylene containing 1-2 atoms of Cl, Br. Halogenated ethylene is fed at amount up 50 mole% of fluoroolefin level followed by treatment of obtained product with gaseous fluorine. EFFECT: simplified and improved process. 4 tbl