A hydrophobic organic liquid composition for selectively extracting lithium salts.

A hydrophobic organic liquid composition selectively extracts lithium cations from brines, addressing the inefficiencies of current lithium mining methods by enhancing recovery rates and reducing costs while minimizing environmental impact.

JP2026506871APending Publication Date: 2026-02-27ADIONICS
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Patent Information

Application Number
JP2025545111
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-02-27
Filing Date
2024-02-26
Publication Date
2026-02-27

AI Technical Summary

Technical Problem

Current lithium mining methods face challenges in efficiently extracting lithium chloride (LiCl) from brines due to high impurity levels of sodium, potassium, calcium, magnesium, and sulfate salts, leading to low yield, high costs, and environmental concerns, particularly in solar evaporation processes.

Method used

A hydrophobic organic liquid composition is developed for selective extraction of lithium cations using specific organic compounds that form stable complexes with lithium ions, allowing separation from other monovalent and divalent cations, followed by regeneration at elevated temperatures.

Benefits of technology

The method significantly improves lithium recovery rates and reduces operational costs by selectively extracting LiCl, overcoming the limitations of existing technologies and minimizing environmental impact.

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Abstract

Hydrophobic organic liquid compositions for selective extraction of lithium salts - Patent Application 20070122997 The present invention relates to the catalysis of lithium cations from the lithium-rich brine being treated, and in particular Cl. - , I - , Br - , C.N. - , NO3 - , HCO3 - and a complementary anion to a lithium ion selected from the group consisting of: [Formula 1] JPEG2026506871000108.jpg4961 at least one compound that abstracts lithium cations, selected from the compounds wherein R1, R2, R3, R4, R5, and R6 are as defined in the specification, and include at least one compound, (B) at least one hydrophobic protic organic compound that solvates an anion complementary to the lithium cation, and (C) at least one hydrophobic polar organic diluent having a flash point at atmospheric pressure greater than 60°C, preferably greater than 75°C, and more preferably greater than 90°C.
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