Method for producing bis(fluorosulfonyl)amide alkali metal salt powder

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United States of America Patent

PATENT NO 11492258
SERIAL NO

16975167

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Abstract

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An object of the present invention is to provide a method for producing a bis(fluorosulfonyl)amide alkali metal salt powder having high purity while suppressing reduction in yield due to thermal decomposition, etc. The method for producing a bis(fluorosulfonyl)amide alkali metal salt powder according to the present invention comprises precipitating a bis(fluorosulfonyl)amide alkali metal salt by conducting distillation using a thin-film evaporator while adding a poor solvent for the bis(fluorosulfonyl)amide alkali metal salt such as an aromatic hydrocarbon solvent and a linear or branched aliphatic hydrocarbon solvent to a solution formed by dissolving the bis(fluorosulfonyl)amide alkali metal salt in a good solvent for the bis(fluorosulfonyl)amide alkali metal salt such as an ester solvent and nitrile solvent.

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Patent Owner(s)

  • NIPPON SODA CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Kenichi Joetsu, JP 253 2822
Hori, Masahiro Takaoka, JP 66 1162
Kohori, Asami Takaoka, JP 1 0
Nishijima, Hiroyuki Takaoka, JP 2 0
Nishizawa, Toshiaki Takaoka, JP 7 100

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