用电解锰阳极液制备电池级硫酸锰

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研究了采用一种新型萃取剂A从电解锰阳极液中通过溶剂萃取获得制备电池级硫酸锰的高纯溶液,考察了振荡时间、水相pH、萃取剂浓度、有机相皂化率、相比Vo/Va、硫酸铵浓度对萃取的影响,以及相比Vo/Va和酸度对反萃取的影响.结果表明:在Vo/Va=1.5/1、萃取剂体积分数30%、有机相皂化率30%、水相pH=4.6、25℃条件下萃取15 min,锰萃取率为77.9%,镁萃取率为13.7%;用1 mol/L硫酸溶液,在相比V o/V a=6/1条件下反萃取负载有机相,得到平均锰质量浓度53 g/L、酸度较低的反萃取液;用此反萃取液制得的硫酸锰产品中锰质量分数大于32%,镁质量分数低于1.5×10-5,符合化工行业《电池用硫酸锰》一等品要求.
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