Method for extracting lithium from high-sodium lithium-containing brine

A brine and high-sodium technology, applied in the direction of improving process efficiency, can solve the problems of low lithium extraction yield and low separation efficiency, and achieve the effects of increasing lithium concentration, reducing lithium loss, and inhibiting desorption
CN114196840APending Publication Date: 2022-03-18JIANGSU JIUWU HITECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU JIUWU HITECH
Publication Date
2022-03-18

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Abstract

The invention relates to a method for extracting lithium from high-sodium lithium-containing brine, in particular to a method for extracting lithium from a high-sodium lithium-containing solution with high yield and reducing the sodium-lithium ratio of a desorption solution, which is used for optimizing a leaching process for extracting lithium from brine of an aluminum adsorbent, and comprises the following steps: enabling the high-sodium lithium-containing solution to flow through a resin column filled with the aluminum adsorbent; enabling a salt solution containing divalent cations to flow through the resin column subjected to adsorption treatment; leach water flows through the resin column subjected to pre-washing treatment; enabling a desorption agent to flow through the eluted resin column, and collecting lithium-rich desorption liquid; and enabling the high-salt solution to flow through a resin column subjected to desorption treatment, and collecting top material effluent. According to the method, lithium is extracted from the high-sodium lithium-containing solution with high yield, the sodium-lithium ratio in the desorption solution is reduced, operational feasibility is provided for further purification and concentration of the desorption solution, and energy consumption is reduced.
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Description

technical field

[0001] The invention relates to a method for extracting lithium from a high-sodium lithium-containing brine, in particular to a method for extracting lithium from a high-sodium lithium-containing solution with a high yield and reducing the ratio of sodium to lithium in the desorption solution, which is used for optimizing an aluminum-based adsorbent The leaching process of extracting lithium from brine Background technique

[0002] Lithium is the lightest alkali metal with the smallest radius in nature, and its chemical properties are active. Lithium and its compounds are widely used in aviation, medicine, chemical industry, national defense, and new energy. They are called "important elements that drive the world forward." The level of lithium production affects the development of emerging industries to a certain extent and restricts the emergence of new technologies. Therefore, the consumption of lithium products is generally regarded as an important indica...

Claims

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