Production of hydrofluorocarbons

Details Production of hydrofluorocarbons Production of hydrofluorocarbons

1995-10-19

1998-05-26

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C07C 1908

Patent

active

057568685

ABSTRACT:
A process for the production of hydrofluorocarbons, in particular hydrofluoroalkanes such as difluoromethane, which comprises contacting an .alpha.-fluoro-ether, in particular a fluorinated dialkyl ether such as bis(fluoromethyl)ether in the liquid phase with a Lewis acid such as a fluoride of Nb, Sb, B, Ta, Al or Ti.

REFERENCES:
patent: 4357282 (1982-11-01), Anderson et al.
patent: 5495056 (1996-02-01), Burgess et al.
Hudlicky, "Reaction of Alkyl 2-Chloro-1,1,2-Trifluoroethyl Ethers with Lewis Acids", Journal of Fluorine Chemistry, vol. 29 (1985), pp. 349-354.
England, "Catalytic Conversion of Fluoroalkyl Alkyl Ethers to Carbonyl Compounds", J. Org. Chem. 1984 49, pp. 4007-4008.
Knunyants et al, "Some Reactions of Fluorine-Containing Ethers" Bulletin of Academy of Sciences of the USSR Division of Chemical Science, vol. 21, No. 10, Oct. 1972, pp. 2177-2180.
Van Dyke, Tiers, "The Chemistry of Perfluoro Ethers. II. Ether Cleavage with Simultaneous Replacement of .alpha.-Fluorine by Chlorine", Journal of the American Chemical Society, vol. 77, 20 Dec. 1955, pp. 6703-6704.

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