一种锂离子吸附材料及其制备方法和应用

By preparing lithium-ion adsorption materials based on sodium alginate, the problems of insufficient permeability and recycling of existing materials have been solved, achieving efficient and environmentally friendly lithium-ion adsorption and promoting the industrialization of lithium extraction.

CN118454657BActive Publication Date: 2026-07-17HAINAN UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HAINAN UNIV
Filing Date
2024-05-15
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing lithium adsorption materials have shortcomings in terms of permeability and recyclability, which limits their industrial application in lithium extraction and also results in poor environmental friendliness.

Method used

Using sodium alginate as a matrix, lithium-ion adsorbent materials were prepared through oxidative ring-opening and aldol condensation reactions. Using lithium ions as templates, materials with imprinting effects were formed. Combined with acid washing and freeze-drying treatment, easily recyclable lithium-ion adsorbent materials were obtained.

Benefits of technology

It achieves high permeability and stable mechanical properties, short adsorption equilibrium time, high lithium-ion adsorption capacity, and is easy to recycle, thus reducing the cost of lithium extraction.

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Abstract

本发明属于吸附材料技术领域,提供了一种锂离子吸附材料及其制备方法和应用。本发明的制备方法包含将海藻酸钠、碳酸钙、葡萄糖酸内酯和水混合得到海藻酸钠水凝胶,将海藻酸钠水凝胶与氧化液混合进行氧化开环反应得到氧化海藻酸钠水凝胶,将氧化海藻酸钠水凝胶、分散剂、溶剂和锂基化合物混合进行羟醛缩合反应得到锂基海藻酸钠水凝胶,将锂基海藻酸钠水凝胶顺次酸洗、冷冻干燥。本发明以海藻酸钠为基体,利用海藻酸钠可被氧化开环的性质,以锂离子为模板通过羟醛缩合反应制成锂离子吸附材料,在24h内即可达到吸附平衡,对锂离子的吸附容量达到60~550mg / g,渗透性好,力学性能稳定,且易从水体中回收,实现循环利用。
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