A PROCESS FOR THE PREPARATION OF PERFLUOROPOLYETHERS ACYLFLUORIDE ENDED BY REDUCTION OF THE CORRESPONDING PEROXIDIC PERFLUOROPOLYETHERS

摘要

A process for the preparation of perfluoropolyethers of for- mula: T-CFX'-O-R f-CFX-COF (I) wherein: T = COF, F, C1-C3 perfluoroalkyl; X, X' = -F, -CF3; R f = -(C2F4O)m(CF2CF(CF3)O)n(CF2O)p(CF(CF3)O)q- , the sum n+m+p+q ranges from 2 to 200, by reduction with hydrogen of the corresponding peroxidic perfluoropolyethers, in the presence of a catalyst formed by metals of the VIII group supported on metal fluorides, at a temperture from 20.degree.C to 140.degree.C, and at a pressure between 1 and 50 atm.