METHOD FOR PRODUCING DISULFONYLAMINE ALKALI METAL SALT

摘要

The present invention provides a method for producing a disulfonylamine alkali metal salt, which comprises the steps of: carrying out a cation exchange reaction of a disulfonylamine onium salt represented by formula [I] (wherein R1 and R2 independently represent an alkyl fluoride group having 1 to 6 carbon atoms or the like, wherein R1 and/or R2 represents a fluorine atom; and R3, R4, R5 and R6 independently represent a hydrogen atom or the like) in an organic solvent to produce a disulfonylamine alkali metal salt represented by formula [II] (wherein M+ represents an alkali metal cation; and R1 and R2 are as defined in formula [I]); and filtering the organic solvent solution containing the disulfonylamine alkali metal salt through a filter having a retentive particle size of 0.1 to 10 µm to produce a filtrate.