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| Preparation of High-purity Manganese Sulfate for Battery by Solvent Extraction |
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Received:March 15, 2014
Revised:March 19, 2014
Accepted:March 20, 2014
Published Online:August 21, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.09.017 |
| KeyWord:high-purity manganese(II) sulfate; Versatic10 ;solvent extraction; impurity removal |
| Author | Institution |
| Tan Li-ming |
中南大学 化学化工学院 |
| Hu Hui-ping |
中南大学 化学化工学院 |
| Liao Jun-mei |
中南大学 化学化工学院 |
| Wang Cai-xia |
中南大学 化学化工学院 |
| Li Chao |
中南大学 化学化工学院 |
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| Abstract: |
| Manganese was selectively extracted from a simulated multi-metal manganese sulfate solution rich in calcium, magnesium, potassium and sodium with extractant Versatic10. Manganese extraction ratio and average content of manganese in loaded organic phase reach 85.34% and 13.5 g/L respectively, under the following conditions including volume concentration of extractant of 30%, saponification ratio of 50%, phase ratio of O/A=4∶1, two-stage countercurrent extraction for 10 min at 35 ℃. The manganese stripping ratio is 99.94 % by two-stage countercurrent stripping of manganese from loaded organic phase by 2 mol/L sulfuric acid with O/A=8∶1 at 35 ℃. In stripped solution, the average content of manganese is 107.89 g/L, and the concentrations of calcium, magnesium, potassium and sodium are all less than 15 mg/L. By treating the stripped solution with activated carbon adsorption, condensation crystallization and desiccation, manganese sulfate monohydrate, which meets requirement of high purity manganese sulfate for battery, is obtained. |
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