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.

US5103051 – PDF

Process for Preparing Perfluoroalkenyl-Sulfonyl Fluorides

US Patent: 50103050 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 radical of from 1 to 9 carbon atoms is disclosed, in which as the starting compound a sultone (II) (II)

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 Goups 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 to 450 C, and the compound (I) is recovered from the reaction effluent.

US5103050 – PDF

Process for Preparing Perfluoroalkenyl-Sulfonyl Fluorides

US Patent: 5103049 A

Date: Apr. 7 1992

Inventors: W. Navarrini, D. D. Desmarteu

ABSTRACT

Process for the synthesis of perfluoroalkenyl-sulfonyl fluorides of formula:

Rf-CF=CF-SO2F

wherein:

Rf is F or a perfluoroalkyl group of from 1 to 9 carbon atoms, consisting in bringing a perfluoroalkyl-(sulfonyl fluoride) monofluoroacetyl-fluoride of formula Rf-CF2-CF(COF)-SO2F 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 to 400 C, and then recovering the desired product. The process is run in continuous.

US5103049 – PDF