	US 12,404,175 B2
	Process for preparing bis(fluorosulfonyl) imide
Dominique Deur-Bert, Pierre-Benite (FR)
Assigned to ARKEMA FRANCE, Colombes (FR)
Appl. No. 17/604,829
Filed by ARKEMA FRANCE, Colombes (FR)
PCT Filed Apr. 21, 2020, PCT No. PCT/EP2020/061062 § 371(c)(1), (2) Date Oct. 19, 2021, PCT Pub. No. WO2020/216734, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 1904381 (FR), filed on Apr. 25, 2019.
Prior Publication US 2022/0041448 A1, Feb. 10, 2022
Int. Cl. C01B 21/093 (2006.01)

CPC C01B 21/0935 (2013.01)

13 Claims

1. A process for preparing bis(fluorosulfonyl)imide comprising the steps of:

i. providing a stream A1 comprising HF and providing a reactor containing a liquid phase A2 comprising bis(halosulfonyl)imide, excluding bis(fluorosulfonyl)imide;

ii. in said reactor, bringing said liquid phase A2 into contact with said stream A1 to produce bis(fluorosulfonyl)imide; wherein said stream A1 is injected into said liquid phase A2, wherein when unreacted HF is removed from the reactor, it is not returned to the reactor, wherein said reactor also comprises a dip tube through which said stream A1 is injected into said liquid phase A2.