Process for preparing perfluoroalkoxysulphonic compounds

Details Process for preparing perfluoroalkoxysulphonic compounds Process for preparing perfluoroalkoxysulphonic compounds

1991-07-10

1993-08-31

Dees, Jose G.

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

Organic compounds

Sulfonic acids or salts thereof

562825, 564 80, 564 82, 564 96, C07C30302, C07C30318

Patent

active

052411109

ABSTRACT:
This invention relates to a process for preparing perfluoroalkoxysulphonic compounds having formula: ##STR1## wherein R.sub.f represents a perfluoroalkyl or perfluoroethereal group, X represents F, OH or OM, in which M is an alkaline cation, an alkaline-earth cation, or X represents NR.sub.1 R.sub.2, in which R.sub.1 and R.sub.2, independently of each other, represent H or an alkyl group containing from 1 to 5 carbon atoms and p is a number selected from 1 to 2, characterized in that the perfluoro vinyl sulphonyl fluoride of formula (II) CF.sub.2 =CF--SO.sub.2 F is reacted with a hypofluorite of formula (III):

REFERENCES:
patent: 4180639 (1979-12-01), Caporiccio et al.
patent: 4411841 (1983-10-01), Geisler
patent: 4906770 (1990-03-01), Marchionni et al.
patent: 4968537 (1990-11-01), Lenti et al.
"1,1,2,2-Tetrafluoro-2-(polyfluoroalkoxy)ethanesulfonyl Fluorides", Ting-Ji Huang, et al., Inorganic Chemistry, vol. 26, No. 14, pp. 2604-2606, 1987.

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