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
Process for the synthesis of perfluoroalkenyl-sulfonyl fluorides of formula: R.sub.f --CF.dbd.CF--SO.sub.2 F wherein: R.sub.f is F or a perfluoroalkyl of from 1 to 9 carbon atoms, consisting in bringing a perfluoroalkyl-(sulfonyl fluoride) monofluoroacetyl-fluride of formula R.sub.f --CF.sub.2 --CF(COF)SO.sub.2 F into contact with a reactant constituted by a carbonate of a metal belonging to Groups IA, IIA and IIB of the Periodical Table of the Elements at a temperature comprised within the range of from 150.degree. to 400.degree. C., and then recovering the desired product. The process is run in continuous.
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