To provide a practicable method for producing a fluorine compound by the few number of steps by which the fluorine compound can be produced industrially and inexpensively by carrying out a fluorination reaction of a substrate by using an easily available fluorinating agent, and a fluorinating agent precursor formed by the reaction can quantitatively be recovered by an easy operation, and to provide a method for recovering or regenerating the fluorination agent precursor.
An N-fluoro quaternary ammonium tetrafluoroborate represented by general formula (1) is used as the fluorinating agent. An N-hydro quaternary ammonium tetrafluoroborate represented by general formula (2) formed by the reaction is separated and recovered from the reaction mixture by a method of precipitation or the like as a crystal by adding a solvent having small affinity for the salt, to the reaction mixture after the reaction.
TOMIZAWA GINJIRO
OISHI KUNJI
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