METHOD FOR PREPARING ULTRAPURE FLUOROSULFONYL IMIDE WITH METAL CATION REMOVED

WIPO Patent Application WO/2018/174574

A1

The present invention relates to a method for preparing a fluorosulfonyl imide salt with a metal cation completely removed. The method of the present invention is a very efficient method in an economic view, and a fluorosulfonyl imide salt with a metal cation completely removed can be prepared by the use of only a crown ether in 1% or less relative to the content of a fluorosulfonyl imide or the content of a lithium salt or a hydrate. Therefore, it is expected that the efficiency of the obtained fluorosulfonyl imide salt is ensured and the battery efficiency is also improved. Meanwhile, the fluorosulfonyl imide salt with a reduced impurity content, prepared by the method of the present invention, especially when used as an electrolyte, can provide a highly functional electrolytic fluorosulfonyl imide salt, which is unlikely to reduce capacity of an electrochemical device, such as a secondary battery, a capacitor, a condenser, or a solar cell.

JP6034981	Granulation of disulfo nil amide salt or powder, and a manufacturing method for the same
WO/2022/128381	METHOD FOR PRODUCING ONIUM SULFONYL IMIDE SALTS AND ALKALI METAL SULFONYL IMIDE SALTS
WO/2022/262175	LITHIUM BIS(FLUOROSULFONYL)IMIDE, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

RYU HYUNG CHUL (KR)
JOUNG JUNG GUN (KR)
SEO HO KYUNG (KR)
LEE SANG RYUL (KR)
KIM KYONG CHEOL (KR)

PCT/KR2018/003317

September 27, 2018

March 21, 2018

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J2H BIOTECH (KR)
CHUN BO LTD (KR)

C01B21/086; B01D9/00; C07D323/00

KR101345271B1	2013-12-27
KR20150039845A	2015-04-13
CN104925765A	2015-09-23
KR20160044275A	2016-04-25
CN103935970A	2014-07-23

YOON, Dae Woong (KR)

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