METHOD FOR PREPARING BIS(FLUOROSULFONYL)IMIDE ACID AND SALTS THEREOF
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IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
H01M-010/0568
C01B-021/086
C01B-021/093
출원번호
US-0101149
(2014-12-03)
공개번호
US-0308247
(2016-10-20)
우선권정보
FR-1362137 (2013-12-05)
국제출원번호
PCT/EP2014/076388
(2014-12-03)
발명자
/ 주소
BUISINE, Olivier
출원인 / 주소
BUISINE, Olivier
인용정보
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초록▼
The invention relates to a method for preparing bis(fluorosulfonyl)imide acid, comprising: the reaction of sulphamic acid or one of the salts thereof with a halogenosulfuric acid and at least one fluorinating agent selected from SOF2, F—SO2—F and SF4, and the subsequent recovery of bis(fluorosulfony
The invention relates to a method for preparing bis(fluorosulfonyl)imide acid, comprising: the reaction of sulphamic acid or one of the salts thereof with a halogenosulfuric acid and at least one fluorinating agent selected from SOF2, F—SO2—F and SF4, and the subsequent recovery of bis(fluorosulfonyl)imide acid. The invention also relates to a method for producing salts of bis(fluorosulfonyl)imide from the bis(fluorosulfonyl)imide acid thus produced.
대표청구항▼
1. A process for preparing bis(fluorosulfonyl)imide acid of formula F—SO2—NH—SO2—F, the process comprising the reaction of sulfamic acid or a salt thereof with at least one halosulfuric acid and at least one fluorinating agent selected from the group consisting of SOF2, F—SO2—F and SF4, then the rec
1. A process for preparing bis(fluorosulfonyl)imide acid of formula F—SO2—NH—SO2—F, the process comprising the reaction of sulfamic acid or a salt thereof with at least one halosulfuric acid and at least one fluorinating agent selected from the group consisting of SOF2, F—SO2—F and SF4, then the recovery of the bis(fluorosulfonyl)imide acid. 2. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein the halosulfuric acid has the formula X—SO2—OH wherein X is a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine. 3. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein said reaction is carried out in the presence of an organic solvent. 4. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein the halosulfuric acid represents from 1 mol % to 5 molar equivalents expressed relative to the sulfamic acid or salts thereof when the fluorinating agent is F—SO2—F. 5. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 4, wherein the halosulfuric acid represents from 5 mol % to 1 molar equivalent expressed relative to the sulfamic acid or salts thereof when the fluorinating agent is F—SO2—F. 6. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein the halosulfuric acid represents from 1 to 5 molar equivalent(s) expressed relative to the sulfamic acid or salts thereof when the fluorinating agent is SOF2 or SF4. 7. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein said fluorinating agent represents from 1 to 10 molar equivalent(s) expressed relative to the sulfamic acid or salts thereof. 8. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein said reaction is performed at a temperature between 0 and 180° C. 9. The process for preparing bis(fluorosulfonyl)imide acid as claimed in claim 1, wherein said bis(fluorosulfonyl)imide acid is recovered by distillation, by sublimation or by extraction. 10. A process for preparing at least one bis(fluorosulfonyl)imide salt, the process comprising preparing the bis(fluorosulfonyl)imide acid according to the process as defined in claim 1, followed by bringing said acid into contact with at least one salification agent. 11. The process for preparing at least one bis(fluorosulfonyl)imide salt as claimed in claim 10, wherein the salification agent is a metal hydroxide, a metal halide, a metal hydride, a metal trifluoroacetate or a metal trifluoromethanesulfonate. 12. The process for preparing at least one bis(fluorosulfonyl)imide salt as claimed in claim 10, wherein said salt has the general formula F—SO2—N—M—SO2—F, where M represents an alkali metal, an alkaline-earth metal, a transition metal or a metal selected from lanthanides. 13. The process for preparing at least one bis(fluorosulfonyl)imide salt as claimed in claim 10, wherein said salt is lithium bis(fluorosulfonyl)imide. 14. The process for preparing at least one bis(fluorosulfonyl)imide salt as claimed in claim 10, also comprising a step of purifying said salt. 15. The process for preparing at least one bis(fluorosulfonyl)imide salt as claimed in claim 14, wherein the purification step consists of a recrystallization. 16. An electrolyte salt, antistatic agent precursor or surfactant precursor, wherein said electrolyte salt, antistatic agent precursor or surfactant precursor is a bis(fluorosulfonyl)imide salts prepared according to the process as defined in claim 10.
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