公开(公告)号：US20230373788A1

公开(公告)日：2023-11-23

申请号：US18044742

申请日：2021-09-10

申请人： Solvay SA

发明人： Ji Tang ,  Zhengbo Zhou ,  Mingxuan Chen ,  Ruihua Wang ,  Liping Song

IPC分类号： C01B21/086

CPC分类号： C01B21/086

摘要： The present invention relates to a method for purifying a salt of bis (fluorosulfonyl) imide which is economically feasible at industrial scale and provides a high-purity product. Said method comprises the steps of providing a crude salt of bis (fluorosulfonyl) imide, dissolving the crude salt of bis (fluorosulfonyl) imide in at least one first solvent, crystallizing the salt of bis (fluorsulfonyl) imide by means of at least one second solvent and separating the crystallized salt of bis (fluorsulfonyl) imide, which can optionally be further reacted with an alkali salt, to obtain an alkali salt of bis (fluorosulfonyl) imide.