Process for Preparing Perfluoroalkenyl-Sulfonyl Fluorides
US Patent: 50103051 A
Date: Apr. 7 1992
Inventors: W. Navarrini, S. Modena
ABSTRACT
A continuous process for preparing perfluoroalkenyl sulfonyl fluorides (I)
Rf-CF=CF-SO2F (I)
wherein Rf is selected from the group consisting of F and a perfluoroalkyl group of from 1 to 9 carbon atoms is disclosed, in which a perfluoroalkyl (sulfonyl fluoride) monofluoroacetyl fluoride of formula
Rf-CF2-CF(COF)SO2F (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 Elements, at a temperature comprised within the range of 150 to 450 C, and the compound (I) is recovered from the reaction effluent.
