| 摘要 |
PROBLEM TO BE SOLVED: To produce a perfluoropolyether functionalized by -COF groups, by using a peroxyperfluoropolyether as a starting material and reducing the starting material in the presence of a catalyst with a substantially quantitative conversion and a selectivity of≥95%. SOLUTION: In a method for producing the perfluoropolyethers, the peroxyperfluoropolyether corresponding to the product is reduced by hydrogen gas in the presence of the catalyst which is formed out of an VIII group metal supported on a metal fluoride compound at a temperature of 20-140°C under a pressure of 1-50 atm, so that the perfluoropolyethers expressed by formula (I): T-CFX'-O-R<SB>f</SB>-CFX-COF [T is COF, F or a 1-3C perfluoroalkyl; X and X' are each -F or -CF<SB>3</SB>; R<SB>f</SB>is -(C<SB>2</SB>F<SB>4</SB>O)<SB>m</SB>(CF<SB>2</SB>CF(CF<SB>3</SB>)O)<SB>n</SB>(CF<SB>2</SB>O)<SB>p</SB>(CF(CF<SB>3</SB>)O)<SB>q</SB>-; and (n+m+p+q) is 2-200] are produced. COPYRIGHT: (C)2004,JPO
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