Lithium adsorbent and preparation method thereof

By introducing a binder framework with a network of interconnected pores and a titanium-based lithium ion sieve into the lithium adsorbent, the problem of a dense skin layer in the preparation process of the lithium adsorbent was solved, achieving efficient adsorption and desorption of lithium and improving the mechanical strength and stability of the lithium adsorbent.

CN122273467APending Publication Date: 2026-06-26WANHUA CHEM GRP CO LTD
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Patent Information

Application Number
CN202411917726.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In the preparation process of existing lithium adsorbents, the formation of a dense skin or the embedding of lithium ion sieve powder by polymer binders results in a low lithium adsorption and desorption rate, which affects their industrial application.

Method used

A binder skeleton with a mesh-like interconnected pore structure is used in conjunction with a titanium-based lithium-ion sieve. Through treatment with polyvinylidene fluoride and alkaline solution, a lithium adsorbent with a mesh-like interconnected pore structure is formed, which avoids the formation of a dense skin layer and increases the proportion and contact area of ​​the lithium-ion sieve.

Benefits of technology

Without affecting the strength of the lithium adsorbent, the adsorption and desorption efficiency of lithium was significantly improved, the specific surface area and mass transfer efficiency were increased, and the mechanical strength and stability of the lithium adsorbent were ensured.

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Abstract

The invention provides a lithium adsorbent and a preparation method thereof.The lithium adsorbent comprises a binder framework and a lithium ion sieve precursor located on at least part of the surface of the binder framework, the binder framework is of a net-shaped communicated pore channel structure, and the sphericity of the lithium adsorbent after grinding is not lower than 95%. According to the lithium adsorbent provided by the invention, as the binder skeleton contained in the lithium adsorbent has a reticular communicated pore channel structure, a compact skin layer can be prevented from being formed on the surface of the lithium adsorbent, and the contact area between the lithium-containing liquid and a lithium ion sieve is effectively increased, so that the adsorption and desorption efficiency of lithium is remarkably improved.
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