Preparation of lithium carbonate from waste lithium solution through precipitation and wet conversion methods
Hydrometallurgy, ISSN: 0304-386X, Vol: 210, Page: 105863
2022
- 21Citations
- 37Captures
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Article Description
The recovery of lithium compounds from various Li resources is attracting attention due to the increased demand in the Li-ion battery (LIB) industry. This study aimed to secure lithium carbonate (Li 2 CO 3 ) using the waste Li solution generated from the cathode manufacturing process. The effects of initial Li + concentration, solution pH, and applied phosphate compounds were examined on converting Li-ion into lithium phosphate (Li 3 PO 4 ) by a precipitation method. Li 2 CO 3 was then obtained from Li 3 PO 4 by reflux and subsequent carbonation methods, in which a concentrated Li solution was produced from Li 3 PO 4 by reaction with metal chloride solutions. Among the tested metal chlorides (AlCl 3, MgCl 2, and CaCl 2 ), CaCl 2 showed the best performance to produce a concentrated Li solution. The highest conversion efficiency (97%) from Li 3 PO 4 to Li solution was observed at 80 °C, and the highest Li concentration (55,900 mg/L) was obtained at a solid(g)/liquid(L) ratio of 500 by reflux reaction. High purity Li 2 CO 3 was produced from the obtained Li solution by purification using sodium hydroxide, and its carbonation using sodium carbonate in turn. The proposed method shows an alternative way to secure Li 2 CO 3 from waste Li solution, in which no acid leaching of Li 3 PO 4 is required to prepare concentrated Li solution to be used Li 2 CO 3 production.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0304386X22000482; http://dx.doi.org/10.1016/j.hydromet.2022.105863; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85126937837&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0304386X22000482; https://dx.doi.org/10.1016/j.hydromet.2022.105863
Elsevier BV
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