Purification of bis(fluorosulfonyl) imide
US12187609B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 27, 2022 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Aug 26, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/086
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing purified bis(fluorosulfonyl) imide includes providing a liquid mixture including bis(fluorosulfonyl) imide and fluorosulfonic acid and then contacting the liquid mixture with gaseous ammonia. The gaseous ammonia reacts with the fluorosulfonic acid to produce ammonium fluorosulfate. The method further includes separating the liquid mixture from the ammonium fluorosulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.