Method for producing a fluorine- and sulfur-bearing compound and salts thereof in an aqueous medium

Patent metadata

Field	Value
Publication number	US-11613465-B2
Application number	US-201415101138-A
Country	US
Kind code	B2
Filing date	Dec 3, 2014
Priority date	Dec 5, 2013
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

The invention relates to a method for producing a fluorine- and sulphur-bearing compound of formula F—SO—R (I) or F—SO2—R (II), comprising the reaction, in the presence of water, of at least one salt providing a fluoride anion and at least one halgoenosulfoxide compound of formula X—SO—R′ (I0) from a halogenosulfonyl compound of formula X—SO2—R′ (II0), in which X is a halogen atom other than fluorine and R and R′ are each a group linked by a covalent bond to the sulphur atom, said bond linking the sulphur atom with a nitrogen atom. The invention also relates to a method for producing salts of a fluorine- and sulphur-bearing compound of formula F—SO—R (I) or F—SO2—R (II) which are advantageously used as electrolyte salts, as precursors of antistatic agents or as surfactant precursors.

First claim

The invention claimed is:

1. A process for preparing a fluorine-containing and sulfur-containing compound of formula F—SO 2 —R (II), the process comprising the reaction, in the presence of water, of at least one salt providing a fluoride anion, wherein the salt providing a fluoride anion is potassium fluoride, and of a halosulfonyl compound of formula X—SO 2 —R′ (II0), where X is chlorine, R is an —NM′SO 2 F group, M′ being potassium, and R′ is an —NHSO 2 X group; wherein the H 2 O/KF mole ratio is from 2.3 to 2.8, the molar equivalent of KF is from 10 to 20.8, the reaction temperature is 50° C. to 100° C., and the reaction time is between 0.5 hr and under 10 hr.

2. The process as defined in claim 1 , further comprising: a step of liquid/liquid extraction, and then the implementation of a sequence comprising the steps of acidification, of recovery of the acid obtained and of neutralization.

3. The process as claimed in claim 1 , further comprising: a step of liquid/liquid extraction, and then the implementation of a cation exchange reaction.

4. The process for preparing at least one salt of a fluorine-containing and sulfur-containing compound of formula (II) as claimed in claim 2 , wherein said salt of said fluorine-containing and sulfur-containing compound of formula (II) is a salt of potassium.

5. The process for preparing at least one salt of a fluorine-containing and sulfur-containing compound of formula (II) as claimed in claim 3 , wherein said salt of said fluorine-containing and sulfur-containing compound of formula (II) is a salt of potassium.

Assignees

• Rhodia Operations

Inventors

• Buisine Olivier
• Metz François

Classifications

• H01M10/0568

  characterised by the solutes · CPC title

• C01B21/093 Primary

  containing also one or more sulfur atoms · CPC title

• C01B21/086

  containing one or more sulfur atoms · CPC title

• C01B21/0935

  Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof · CPC title

• H01M10/052

  Li-accumulators · CPC title