EP 3494086 A1 20190612 - METHOD FOR DRYING AND PURIFYING LIFSI
Title (en)
METHOD FOR DRYING AND PURIFYING LIFSI
Title (de)
VERFAHREN ZUR TROCKNUNG UND REINIGUNG VON LIFSI
Title (fr)
PROCÉDÉ DE SÉCHAGE ET DE PURIFICATION DE LIFSI
Publication
Application
Priority
- FR 1662130 A 20161208
- FR 2017053447 W 20171207
Abstract (en)
[origin: WO2018104675A1] The present invention relates to a method for drying and purifying a lithium bis(fluorosulfonyl)imide salt in solution in an organic solvent S1, said method comprising the following steps: a) adding deionised water to dissolve and extract the lithium bis(fluorosulfonyl)imide salt, forming an aqueous solution of said salt; b) extracting the lithium bis(fluorosulfonyl)imide salt from said aqueous solution, using an organic solvent S2, said step being repeated at least once; c) concentrating the lithium bis(fluorosulfonyl)imide salt by evaporating said organic solvent S2 and the water, in a short-path thin-film evaporator, under the following conditions: temperature of 30°C to 95°C, pressure of 10- 3 mbar abs to 5 mbar abs, residence time no longer than 15 min; and d) optionally crystallising the lithium bis(fluorosulfonyl)imide salt. The present invention likewise relates to a composition made of lithium bis(fluorosulfonyl)imide salt, and the uses thereof in Li-ion batteries.
IPC 8 full level
C01B 21/093 (2006.01); C01D 15/00 (2006.01)
CPC (source: EP KR US)
B01D 1/22 (2013.01 - US); C01B 21/086 (2013.01 - KR US); C01B 21/0935 (2013.01 - EP US); H01M 10/0525 (2013.01 - US); H01M 10/0568 (2013.01 - US); B01D 11/0492 (2013.01 - US); C01P 2006/40 (2013.01 - US); H01M 2300/0025 (2013.01 - US); Y02E 60/10 (2013.01 - EP); Y02P 20/133 (2015.11 - EP US)
Citation (search report)
See references of WO 2018104675A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2018104675 A1 20180614; CN 109982966 A 20190705; CN 109982966 B 20221101; EP 3494086 A1 20190612; FR 3059994 A1 20180615; FR 3059994 B1 20210319; JP 2020500132 A 20200109; JP 6917447 B2 20210811; KR 102337612 B1 20211208; KR 20190040348 A 20190417; US 11084723 B2 20210810; US 2019292053 A1 20190926; US 2021323823 A1 20211021
DOCDB simple family (application)
FR 2017053447 W 20171207; CN 201780068664 A 20171207; EP 17816998 A 20171207; FR 1662130 A 20161208; JP 2019515208 A 20171207; KR 20197009225 A 20171207; US 201716331242 A 20171207; US 202117358819 A 20210625