Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (5): 28-37.doi: 10.19964/j.issn.1006-4990.2021-0371

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress on lithium ion sieves

ZHANG Liyuan1,2(),SHEN Ruqian1,YANG Jinju2,LI Yan1,SHUI Yi1,SU Min1   

  1. 1.College of Chemistry and Chemical Engineering,Neijiang Normal University,Neijiang 641112,China
    2.Sichuan Science and Technology Resources Sharing Service Platform of Special Agricultural Resources in Tuojiang River Basin
  • Received:2021-06-05 Online:2022-05-10 Published:2022-05-31

Abstract:

Lithium ion sieves(manganese and titanium series) show high adsorption selectivity for lithium ion in salt lake brine with high Mg/Li ratio(mass ratio).The lithium extraction mechanism of spinel structure lithium ion sieve mainly includes redox mechanism,ion exchange mechanism and composite mechanism,while the layered structure lithium ion sieve is mainly realized by simple ion exchange between Li+ and H+.The preparation process of lithium ion sieve is simple.First,solid phase combustion,microwave combustion or sol-gel process,hydrothermal method,coprecipitation method and molten salt synthesis method are used to prepare precursors,and then the Li+ in the corresponding precursor can be replaced by H+.The prepared lithium ion sieve can be used to extract lithium from liquid lithium resources such as salt lake brine and seawater with large reserves and low grade.In recent years,the research is mainly focused on titanium lithium ion sieve with higher structural stability,however,further studies are needed to further improve the structural stability and realize engineering application.

Key words: lithium ion sieve, lithium extraction mechanism, preparation method, ion exchange, selectivity

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