溶剂萃取法制备电池级高纯硫酸锰.docxVIP

[1]-6 -6 [2-5] [1] -6 -6 [2-5] [6-11] 2+ 2+ 2+ + + doi：10.3969/j.issn.1007-7545.2014.09.017 溶剂萃取法制备电池级高纯硫酸锰 谭力铭，胡慧萍，廖俊梅，王彩霞，李超 （中南大学 化学化工学院，长沙 410083） 摘要：以Versatic10为萃取剂从含钙、镁、钾、钠的模拟硫酸锰浸出液中选择性萃取锰。在萃取剂浓度30%、 皂化率50%、相比O/A=4/1、35 ℃两级逆流萃取10 min后，得到平均锰含量为13.5 g/L的负载有机相，锰萃取 率达85.34%。负载有机相和2 mol/L硫酸反萃液在相比O/A=8/1、反萃温度35 ℃、两级逆流反萃的条件下，得 到平均锰含量为107.89 g/L的反萃后液，锰反萃率达99.94%，其中钙、镁、钾、钠的浓度均小于15 mg/L。反萃 后液经活性炭吸附、浓缩结晶并干燥后，获得了满足电池级高纯硫酸锰要求的一水硫酸锰产品。 关键词：高纯硫酸锰；Versatic10；溶剂萃取；除杂 中图分类号：TF804.2 文献标志码：A 文章编号：1007-7545 （2014）09-0000-00 Preparation of High-purity Manganese Sulfate for Battery by Solvent Extraction TAN Li-ming, HU Hui-ping, LIAO Jun-mei, WANG Cai-xia, LI Chao (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China) 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. Key words: high-purity manganese(II) sulfate; Versatic10 ;solvent extraction; impurity removal 随着电动汽车和储能对锂电池需求量的大幅增长，硫酸锰作为生产锰酸锂最重要的原材料之一，其市场需 求也会更加迫切。电池级硫酸锰对各种杂质含量的要求极其严格 ，其中铁、铜、铅、锌和铬含量均需小于 10×