公开(公告)号：WO2022128381A1

公开(公告)日：2022-06-23

申请号：PCT/EP2021/082907

申请日：2021-11-25

Applicant: RHODIA OPERATIONS

Inventor： SCHMITT, Etienne

IPC: C01B21/093 ,  C01B21/092 ,  H01G11/58 ,  H01M10/0525 ,  C01B21/086

Abstract: The invention relates to a new method for producing an onium salt of bis(fluorosulfonyl)imide and an alkali metal salt of bis(fluorosulfonyl)imide of high purities, as industrial scale, and with a reasonable cost when compared to the other available methods. Said method comprises the steps of reacting bis(chlorosulfonyl)imide or salts thereof with an onium halide other than an onium fluoride to produce an onium salt of bis(chlorosulfonyl)imide, reacting the onium salt of bis(chlorosulfonyl)imide with an onium fluoride to produce an onium salt of bis(fluorosulfonyl)imide; the onium salt of bis(fluorosulfonyl)imide may be further reacted with an alkali metal salt to obtain an alkali metal salt of bis(fluorosulfonyl)imide.

公开(公告)号：WO2023046720A1

公开(公告)日：2023-03-30

申请号：PCT/EP2022/076166

申请日：2022-09-21

Applicant: RHODIA OPERATIONS

Inventor： SCHMITT, Etienne

IPC: C01B21/086 ,  C01B21/093 ,  C07C303/44 ,  H01M10/0525 ,  H01M10/0568

Abstract: The present invention relates to a process for manufacturing a bis(chlorosulfonyl)imide (HCSI) of ultra-pure (UP) grade with a purity of at least 99.0 mol.% with respect to the total number of moles of HCSI. In addition, the present invention relates to an HCSI of UP grade obtainable from the process, and to the use of the HCSI of UP grade for preparing a lithium bis(fluorosulfonyl)imide (LiFSI). The present invention also relates to a process for manufacturing a LiFSI comprising the preparation of an HCSI of UP grade according to the present process. The present invention relates to a composition comprising a LiFSI with a purity of at least 99.99 mol.% with respect to the total number of moles of LiFSI in the composition, and to the use of a composition comprising a LiFSI obtainable from the present process in a lithium-ion secondary battery.

公开(公告)号：WO2022248215A1

公开(公告)日：2022-12-01

申请号：PCT/EP2022/062660

申请日：2022-05-10

Applicant: RHODIA OPERATIONS

Inventor： SCHMITT, Etienne

IPC: C01B21/086 ,  C01B21/093 ,  C01B21/092 ,  H01G11/58 ,  H01M10/0525 ,  H01G11/62

Abstract: The present disclosure relates to a new method for producing alkali salt of bis(fluorosulfonyl)imide of high purity, as industrial scale, and with a reasonable cost when compared to the other available methods. Said method comprises the steps of reacting a bis(chlorosulfonyl)imide or a salt thereof with an onium chloride to produce an onium salt of bis(chlorosulfonyl)imide; reacting an onium salt of bis(chlorosulfonyl)imide with anhydrous hydrogen fluoride in at least one organic solvent to produce onium salt of bis(fluorosulfonyl)imide; and reacting the onium salt of bis(fluorosulfonyl)imide with an alkali salt to obtain alkali salt of bis(fluorosulfonyl)imide.

公开(公告)号：WO2023041519A1

公开(公告)日：2023-03-23

申请号：PCT/EP2022/075389

申请日：2022-09-13

Applicant: RHODIA OPERATIONS

Inventor： SCHMITT, Etienne

IPC: C01B21/086 ,  C01B21/092 ,  C01B21/093 ,  H01G11/58 ,  H01M10/0525

Abstract: The present disclosure relates to a method for preparing salts of bis(fluorosulfonyl)imide and to a method for preparing alkali metal salts of bis(fluorosulfonyl)imide from said bis(fluorosulfonyl)imide salts. More specifically, the invention provides a new method for producing these salts of bis(fluorosulfonyl)imide which is implementable at industrial scale and providing high-purity bis(fluorosulfonyl)imide salts.