Method for extracting lithium in salt lake brine by using imidazolium ionic liquid

By combining imidazole ionic liquid extractants with V-type filter solar pond precipitation, the problems of high energy consumption, environmental pollution, and difficulty in large-scale production of traditional salt lake lithium extraction methods have been solved, achieving green and efficient lithium resource recovery.

CN121592880APending Publication Date: 2026-03-03LIAONING UNIVERSITY
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Patent Information

Application Number
CN202511870341.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-12
Publication Date
2026-03-03

AI Technical Summary

Technical Problem

Traditional lithium extraction methods from salt lakes suffer from high energy consumption, expensive equipment, environmental pollution, low extraction efficiency, and difficulty in large-scale production. Furthermore, the use of volatile organic solvents in traditional extraction methods poses risks to the environment and the health of operators.

Method used

Using imidazole ionic liquids as extractants and combining them with V-type filter solar pond precipitation, lithium is extracted from salt lake brine using solar energy. Through a multi-step extraction and precipitation process, green solvents are used to reduce environmental pollution and improve extraction efficiency.

Benefits of technology

This technology enables large-scale, low-cost, green, and efficient extraction of lithium from salt lake brines, reducing energy consumption and environmental pollution while improving the purity and recovery rate of lithium resources.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention belongs to the technical field of salt lake lithium extraction, and particularly relates to a method for extracting lithium in salt lake brine by using imidazolium ionic liquid. The method comprises the following steps: sequentially carrying out V-shaped filter tank sedimentation, solar tank concentration, sedimentation tank sedimentation, ionic liquid extraction, hydrochloric acid reverse extraction and recrystallization purification on the salt lake brine. According to the method for extracting the lithium in the salt lake brine by using the imidazolium ionic liquid, the lithium ions in the solution can be extracted at low cost and high efficiency, the method is simple in process and low in cost, and the green solvent ionic liquid is used as an extracting agent in the production process, so that the method is suitable for large-scale production. The production cost is saved to a great extent, no harm is caused to the environment, and high economic benefits are achieved.
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Citation Information

Patent Citations

  • Extraction agent and extraction method for lithium precipitation mother liquor

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  • System and process for extracting lithium from salt lake

    CN119571056A