Research progress of aluminum adsorbents in lithium extraction from salt lakes

被引：0
|
作者：
Li Y. [1 ]
Liu Y. [1 ]
Huo J. [1 ]
Sun Y. [1 ]
Dong S. [1 ]
He X. [1 ]
Xu Q. [1 ]
Ma L. [1 ]
Zhou Y. [1 ]
Hai C. [1 ]
机构：
[1] College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Sichuan, Chengdu
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 12期
关键词：
adsorbents; crystal structure; lithium; salt lake; structure stability;
D O I：
10.11949/0438-1157.20231035
中图分类号：
学科分类号：
摘要：
With the rapid development and wide application of power battery vehicles, the demand for lithium resources has increased sharply. How to realize the efficient utilization and development of lithium resources in salt lakes, which has international resource advantages in China, is a key issue that the salt lake chemical industry needs to solve urgently in recent decades. Compared with the salt lakes that have been developed and utilized abroad, except for some salt lakes in Xizang, the lithium resources in China ' s salt lakes are mostly low-grade resources with lithium concentrations as low as tens of mg/L and extremely high magnesium lithium ratio (about 500 or even higher). Up to now, based on the characteristics of lithium resources in salt lakes, several methods have been developed to extract lithium from salt lakes, such as membrane method, adsorption method, solar pool method, solvent extraction method and electrochemical method, some of which have been successfully applied in the actual industrial production of lithium extraction from salt lake brines. Especially, adsorption method has attracted much attention due to its characteristics of high Li+ selectivity, good applicability, simple process, green efficiency and recyclability. Layer-structured aluminum-based adsorbents (Li/Al-LDHs) have been successfully industrialized due to their high selectivity, green environmental protection and other advantages. However, there are still some problems such as extremely low dynamic adsorption capacity and serious pulverization in the large-scale application of this kind of adsorbent, which need further study and discussion. Therefore, based on the structure-activity relationship between the adsorption properties of Li/Al-LDHs and the crystal structure, this paper summarized the reasons for the short cycle period and poor application performance of Li/Al-LDHs adsorbent, and proposed the performance improvement scheme from the perspective of structural stability. © 2023 Materials China. All rights reserved.
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页码：4777 / 4791
页数：14
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