C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/52.3, 260/53
C25B 3/02 (2006.01)
Patent
CA 1167867
Abstract of the disclosure: Perfluorocarbonylsulfonic acid fluorides of the formula I Image (I) in which Rf denotes F or perfluoroalkyl and n denotes a number from 0 to 7 are prepared by electrolysis of mono- hydroperfluoroalkanesulfonic acid halides of the formula II Image (II) in which Rf and n have the same meaning as in formula I and X is chlorine or fluorine, preferably fluorine, in an electrolyte consisting of fluorosulfonic acid/alkali metal fluorosulfonate, using glassy carbon as the anode material, and treatment of the fluorosulfatoperfluoro- alkanesulfonic acid halides thereby formed, of the formula III Image (III) in which Rf, X and n have the same meaning as in the formulae I and II, with catalytic to equimolar (if X=F), and additionally at least further equimolar (if X=Cl) amounts of an alkali metal fluoride. The fluorosulfatoperfluoroalkanesulfonic acid halides III thereby formed as intermediates, and those perfluorocarbonylsulfonic acid fluorides I in which n = a number from 2 to 7 are new. The compounds I are chiefly intermediates for the preparation of perfluorinated ion exchanger resins.
385677
Millauer Hans
Schwertfeger Werner
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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