NEW PROCESS FOR BISTRIFLUOROMETHANESULFONYLIMIDE SALT

    公开(公告)号:EP3705470A1

    公开(公告)日:2020-09-09

    申请号:EP20020112.7

    申请日:2020-03-09

    发明人: Shen, Fengfeng

    IPC分类号: C07C303/38 C07C311/48

    摘要: The present disclosure provides a method for preparing a bistrifluorosulfonylimide salt, which includes the following steps: S1: using primary amine and trifluoromethylsulfonic anhydride to prepare the corresponding N-alkyl substituted bistrifluoromethylsulfonylimide; S2: reacting the N-alkyl substituted bistrifluoromethylsulfonylimide with a salt to obtain a crude product; and S3: crystallizing and vacuum-drying the crude product to obtain a bistrifluoromethylsulfonylimide salt. The present disclosure has the following advantageous effects:, the N-alkyl substituted bistrifluoromethylsulfonylimide is stable in nature, no corrosive substances are generated during the entire reaction, and there are fewer three wastes, which makes the present disclosure suitable for large-scale production, and enables a high-purity battery-grade bistrifluoromethylsulfonylimide salt to be obtained; therefore, the present disclosure has great implementation value and social and economic benefits.