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US 10,717,705 B2Granted
Method for producing fluorine-containing sulfonylamide compound
AssigneeNippon Soda Co., Ltd.
InventorsShiro Tsubokura, Yuka Aomori, Satoshi Kako
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Abstract
A method for efficiently removing impurities such as sodium ions, fluoride ions, chloride ions and fluorosulfate ions without reducing the yield of a target product, including a fluorine-containing sulfonylamide compound selected from the group consisting of fluorine-containing sulfonylamide, a metal salt thereof, an ammonium salt thereof and a quaternary ammonium salt thereof is washed with an aqueous solution of salt of sulfuric acid.
Claims2
A method for producing a fluorine-containing sulfonylamide compound, the method comprising:
- mixing a fluorine-containing sulfonylamide compound represented by Formula [II]:
- wherein
- R1 represents a fluorinated alkyl group having 1 to 6 carbon atoms or a fluorine atom;
- R2 represents a chlorine atom or a fluorine atom;
- M represents a lithium atom or an ammonium cation residue, and
- n is 1,
- with an aqueous solution of a salt of sulfuric acid selected from the group consisting of lithium sulfate and ammonium sulfate;
- and then
- removing the aqueous solution of a salt of sulfuric acid from the fluorine-containing sulfonylamide compound represented by Formula [II],
- wherein:
- when M is a lithium atom, the salt of sulfuric acid is lithium sulfate, and
- when M is an ammonium cation residue, the salt of sulfuric acid is ammonium sulfate.
9 more elements
Dependencies are inferred from the claim text.