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US 4,731,170 AGranted
Process for preparing alpha, omega-haloperfluoroalkanes
AssigneeAusimont S.p.A.
InventorsGerardo Caporiccio, Gianangelo Bargigia, Claudio Tonelli, Vito Tortelli
Life of this patent
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Abstract
A process for preparing .alpha.,.omega.-dihaloperfluoroalkanes consisting in dihalogenating .alpha.,.omega.-diiodoperfluoroalkanes, or .alpha.,.omega.-chloroiodoperfluoroalkanes or .alpha.,.omega.-bromoiodoperfluoroalkanes with Cl.sub.2 or Br.sub.2.
Claims10
A process for preparing tetrafluoroethylene telomers of the formula X(C.sub.2 F.sub.4).sub.n Y, wherein n is an integer from 2 to 6, and X and Y, the same or different, are Cl or Br, which comprises:
- (a) telomerizing tetrafluoroethylene with a telogen of the formula Z(C.sub.2 F.sub.4)I, wherein Z is I, Br, or Cl, to form a telomer of the formula Z(C.sub.2 F.sub.4).sub.n I, and
- (b) reacting Z(C.sub.2 F.sub.4).sub.n I with chlorine or bromine at a temperature between 0.degree. and 180.degree. C. in the absence of solvent or diluent.
Dependencies are inferred from the claim text.