PURIFICATION OF BIS (FLUOROSULFONYL) IMIDE SALT

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 bi...

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Bibliographische Detailangaben
Hauptverfasser:	Chen, Mingxuan, Tang, Ji, Song, Liping, Zhou, Zhengbo, Wang, Ruihua
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:	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.