Method for recovering lithium bis (fluorosulfonyl) imide
Source: EPO OPS
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Dossier Overview
Applicant
NINGDE ERA NEW ENERGY SCIENCE AND TECH STOCK LIMITED COMPANY; ICHO SIKANG NEW MAT CO LTD
Application number
CN202210110593
Inventor
CHENG SICONG; HUANG QISEN
Filing Date
Jan 29, 2022
Publication Date
Apr 29, 2022
Patent Family ID
81279592
IPC Classification
CPC Classification
The invention provides a method for recovering lithium bis (fluorosulfonyl) imide. The method comprises the following steps: mixing waste residues from a lithium bis (fluorosulfonyl) imide manufacturing process with a carbonic ester solvent to obtain a mixture; carrying out solid-liquid separation on the mixture to obtain discharged liquid and solid residues; monitoring the chromatic value of the discharged liquid, and comparing the chromatic value of the discharged liquid with a reference chromatic value; when the chromatic value of the discharged liquid is greater than the reference chromatic value, circulating the discharged liquid into the mixture; and when the chromatic value of the discharged liquid is less than or equal to the reference chromatic value, circulating the discharged liquid to a lithium bis (fluorosulfonyl) imide manufacturing process.
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