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- W2956262640 endingPage "115823" @default.
- W2956262640 startingPage "115823" @default.
- W2956262640 abstract "There is a dramatically increasing demand for lithium calls, which requires processing all viable resources. A solution with low Li+ concentration is often generated during the production process of lithium and its compounds. Recovery of these resources via Li3PO4 precipitation is a promising method, but there are few effective methods for the subsequent processing of the Li3PO4. In this work, a novel method for treating lithium phosphate is proposed. After dissolving Li3PO4 with acid, a high concentration of Li and P existed in the form of cations and anions respectively in the solution. The saponified di-2-ethylhexyl phosphoric acid (D2EHPA)-kerosene system was used to separate the Li and P. The Li was effectively extracted, while P remained in the raffinate. The extraction was a process of cation-exchange between Li+ and Na+. Under the optimized conditions, the concentrations of Li and entrained P in the stripping solution were 18.1 g/L and 0.08 g/L. The mass ratio of P/Li of the stripping solution was reduced to 0.0044 (336 times lower compared to the feed solution P/Li ratio of 1.48). The stripping solution was precipitated with sodium carbonate, and the Li2CO3 precipitation ratio reached 90% at 80 °C under the CO32–/Li+ molar ratio of 1.23:2. The final product of lithium carbonate was in accordance with the standard specification (Li2CO3-0, GB/T 11075-2013). The results of this study provide an efficient process for recovering low-concentration lithium resources." @default.
- W2956262640 created "2019-07-23" @default.
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- W2956262640 date "2019-12-01" @default.
- W2956262640 modified "2023-09-25" @default.
- W2956262640 title "Separation and recovery of lithium from Li3PO4 leaching liquor using solvent extraction with saponified D2EHPA" @default.
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- W2956262640 doi "https://doi.org/10.1016/j.seppur.2019.115823" @default.
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