Application of Membrane Functional Material and Technology in Lithium Extraction from Salt Lake
At present,with the rapid development of new energy vehicles and energy storage technolo-gy,the demand for lithium materials is unprecedentedly high.Aiming at the problem of how to extract lithi-um from brine efficiently,the application of membrane functional materials such as ultrafiltration mem-brane,nanofiltration membrane,reverse osmosis membrane,electrodialysis membrane and bipolar mem-brane in the process of extracting lithium from salt lake is summarized and analyzed.The'adsorption+mem-brane'coupling process can achieve efficient lithium extraction,the technology of lithium extraction by membrane method has the characteristics of low energy consumption and strong selectivity.The process mainly consumes electric energy,reduces the dependence on purchased chemicals,and can meet the de-mand of lithium extraction from salt lakes in remote mining areas.The future research direction can be im-proved and optimized from the aspects of the anti-fouling ability of the membrane is not well,the high salini-ty will lead to the deterioration of the separation effect of the nanofiltration membrane on lithium and magne-sium,and the ultrafiltration membrane,reverse osmosis membrane and nanofiltration membrane have strict requirements on the feed temperature.
lithium extraction from salt lakemembrane materialsenrichmentseparationcom-bined technique
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