Method for inorganic material recycling and compositions produced therefrom

EP4762194A1Pending Publication Date: 2026-06-24GREENLIB MATERIALS INC
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
GREENLIB MATERIALS INC
Filing Date
2024-08-13
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

The current recycling processes for lithium-ion batteries are not environmentally friendly, energy efficient, or economically viable, leading to significant ecological harm and resource inefficiency due to pollutant-heavy and energy-demanding methods like hydrometallurgy and pyrometallurgy.

Method used

A method involving carbothermal reduction and froth flotation of black mass from crushed batteries or electronic waste, followed by water leaching and acid leaching to recover metals and minerals such as lithium, cobalt, nickel, and graphite, using primarily electricity and water to minimize waste and environmental impact.

Benefits of technology

This method achieves a high recovery rate of approximately 95% of essential elements, reduces greenhouse gas emissions by 76% compared to traditional mining methods, and produces environmentally friendly, energy-efficient, and economically viable reclaimed products.

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Abstract

A method for recovery of metals and minerals from electronic waste includes introducing a black mass (BM) of crushed electronics into a thermal chamber to perform a carbothermal reduction or pyrolysis on the black mass to yield recoverable graphitics. Water is then introduced to a remaining portion of the treated black mass to form a black mass froth flotation and a first water leaching of the black mass froth flotation is performed to form a leached solution and a filtrate or cake is formed. A second leaching is performed with a strong acid on the cake and a second filtering to form a filtrate. The filtrate is subjected to a copper extraction or electrowinning, aluminum and iron precipitation, or vice versa, to recover a copper portion, and aluminum and / or iron.
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