Process for preparing perfluoroalkenyl-sulfonil 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
status (Latency Note)
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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 of from 1 to 9 carbon atoms is disclosed, in which a perfluoroalkyl (sulfonyl fluoride) monofluoroacetyl fluoride of formula R.sub.f --CF.sub.2 --CF(COF)SO.sub.2 F (II) is used as the starting product. The starting product is contacted with a reactant selected from the group consisting of the oxides of an element of the Groups IA, IIA, IIB, IIIA and IVA of the Periodic Table of the Elements, and of 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.
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