Process for purifying a leaching filtrate from the black mass of lithium-ion batteries

A Fenton-type reaction with a Fenton catalyst and phosphate salt effectively degrades organic impurities in lithium-ion battery leaching filtrate, improving the recovery of lithium and other metals by up to 88% and supporting battery recycling.

FR3161074A1Pending Publication Date: 2025-10-10ERAMET
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Patent Information

Application Number
FR2024003484
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-04
Publication Date
2025-10-10

AI Technical Summary

Technical Problem

Existing methods for recycling lithium-ion batteries fail to effectively remove organic impurities such as ethylene carbonate, propylene carbonate, and other solubilized organic compounds from the leaching filtrate of black mass, which hinders the recovery of valuable metals like lithium, nickel, cobalt, and manganese.

Method used

A Fenton-type reaction is employed using a Fenton catalyst, optionally with a phosphate salt, to chemically degrade organic compounds in the leaching filtrate, optimizing the process by adjusting pH and temperature conditions.

Benefits of technology

The method significantly reduces the total organic carbon concentration in the leaching filtrate, enhancing the recovery of lithium and other valuable metals by up to 88%, while promoting recycling of lithium-ion batteries.

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Abstract

Method for purifying a leaching filtrate of the black mass of lithium-ion batteries The present invention relates to a method for purifying a leaching filtrate of the black mass of lithium-ion batteries, said filtrate containing lithium and at least one solubilized organic compound, said method comprising the step of adding an oxidizing agent, a Fenton catalyst, and optionally a phosphate salt to said filtrate so as to obtain a solution containing lithium and depleted in said at least one solubilized organic compound.
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