METHOD FOR THE RECOVERY OF LITHIUM BIS(FLUORSULFONYL)IMID
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- CATL-SICONG NOVEL MATERIALS CO LTD
- Filing Date
- 2022-01-29
- Publication Date
- 2026-04-22
AI Technical Summary
The existing LiFSI production process faces challenges such as expansive costs, scarce raw materials, cumbersome processes, low product conversion rate, high energy consumption, and environmental pollution, with difficulties in achieving high purity and removing moisture content, making it difficult to recover residual LiFSI from slag effectively.
A method involving mixing slag from LiFSI production with a carbonate ester solvent, followed by solid-liquid separation, monitoring chromaticity, and recycling the discharged liquid back to the process if it meets a predetermined chromaticity threshold, allowing for the recovery and reuse of LiFSI while removing impurities like lithium sulphate, lithium fluoride, and lithium sulphamate.
This method enhances LiFSI recovery rate to over 85% and reduces environmental pollution by thoroughly removing impurities, maximizing the reuse of LiFSI and optimizing the production process.