Process for the preparation of lithium or sodium bis(fluorosulphonyl)imide
US9394172B2 · kind B2 · utility
4Cited by
5References
26Claims
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Key dates
| Filing date | Sep 3, 2014 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Sep 3, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49108
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for the preparation of a bis(sulphonato)imide salt of formula: (III) (SO3−)—N−—(SO3−)3C+ where C+ represents a monovalent cation, comprising the reaction of amidosulphuric acid of formula: (I) (OH)—SO2—NH2 with a halosulphonic acid of formula: (II) (OH)—SO2—X where X represents a halogen atom, and comprising a reaction with a base which is a salt formed with the cation C+. Also, a process for the preparation of bis(fluorosulphonyl)imide acid of formula: (V) F—(SO2)—NH—(SO2)—F and to a process for the preparation of lithium bis(fluorosulphonyl)imide salt of formula: (VII) F—(SO2)—N−—(SO2)—F Li+.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.