FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing perfluoro-3-oxa-pentene-sulphonyl fluoride, used as a comonomer when producing polymers used to produce ion-exchange membranes, fuel cells and electrolysis apparatus. The method is carried out via chlorination of perfluoro-3-oxa-pentene-sulphonamide in the medium of an aprotic solvent (diglyme, tetraglyme) with a chlorinating agent, followed by fluorination of the formed perfluoro-3-oxa-pentene-sulphonyl chloride with an alkali metal fluoride in a polar aprotic solvent (sulpholane, acetonitrile) and separating the end product.
EFFECT: novel method of producing perfluoro-3-oxa-pentene-sulphonyl fluoride with high output and purity from readily available material.
5 cl, 3 ex
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