The present invention provides a method for producing a disulfonylamine alkali metal salt, including a step of subjecting a disulfonylamine onium salt represented by formula [I] (wherein each of R1 and R2 independently represents a fluorine atom or a fluorinated alkyl group having 1 to 6 carbon atoms, provided that at least one of R1 and R2 represents a fluorine atom, and each of R3, R4, R5 and R6 independently represents a hydrogen atom or the like) to a cation exchange reaction in an organic solvent, thereby producing 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 a step of filtering the organic solvent solution containing the disulfonylamine alkali metal salt through a filter having a particle retention size of 0.1 to 10 µm to obtain a filtrate.
本发明提供了一种生产二磺酰基胺碱
金属盐的方法,包括将式[I]代表的二磺酰基胺鎓盐(其中R1和R2各自独立地代表
氟原子或具有1至6个碳原子的
氟化烷基,条件是R1和R2中至少有一个代表
氟原子,R3、R4、R5和R6各自独立地代表氢原子或类似物)在有机溶剂中进行阳离子交换反应,从而生成式[II]代表的二磺酰基胺碱
金属盐(其中M+代表氢原子或类似物)、R5和R6各自独立地代表氢原子或类似物)在有机溶剂中进行阳离子交换反应,从而生成由式[II]表示的二磺酰基胺碱
金属盐(其中M+代表碱
金属阳离子,R1和R2如式[I]中所定义)。1至10微米的过滤器过滤,得到滤液。