Process for preparing perfluoroalkenyl-sulfonyl fluorides
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United States of America Patent
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Apr 7, 1992
Grant Date -
N/A
app pub date -
Apr 26, 1990
filing date -
Apr 28, 1989
priority date (Note) -
Expired
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Abstract
A continuous process for preparing perfluoroalkenyl sulfonyl fluorides (I) R.sub.f --CF.dbd.CF--SO.sub.2 F (I) wherein: R.sub.f is selected from the group consisting of F and a perfluoroalkyl radical of from 1 to 9 carbon atoms is disclosed, in which as the starting compound a sultone (II) ##STR1## is used. The starting compound is placed into contact with a reactant selected from the group consisting of oxides and carbonates of an element of the Groups IA, IIA and IIB, and of the oxides of an element of the Groups IIIA and IVA of the Periodic Table of the Elements, and their mixtures, at a temperature comprised within the range of from 150.degree. to 450.degree. C., and the compound (I) is recovered from the reaction effluent. and the compound (I) is recovered from the reaction effluent.
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