A process for at least partially removing fluorosulfonic acid and / or its derivatives from a mixture of crude fluorosulfonyliimide compounds.

By melting bis(fluorosulfonyl)imide and reacting it with metal halides or sulfates without diluents, the method effectively removes fluorosulfonic acid, ensuring high-purity HFSI production for battery applications.

JP2026518464APending Publication Date: 2026-06-08SPECIAL OPERATIONS FRENCH CO
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
SPECIAL OPERATIONS FRENCH CO
Filing Date
2024-05-31
Publication Date
2026-06-08

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Abstract

The present invention relates to a process for producing a purified mixture by at least partially removing fluorosulfonic acid and / or its derivatives from a crude bis(fluorosulfonyl)imide mixture containing a hydrogen bis(fluorosulfonyl)imide compound and fluorosulfonic acid and / or its derivatives, by reacting the crude mixture in the molten phase with a halide or sulfate.
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