Journal of Jishou University(Natural Sciences Edition)

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Removal of Ca and Mg Ions from Industrial Manganese Sulfate Solution by Solvent Extraction

DAI Dongyang,LIU Zhixiong,SUN Lin,TANG Liandong,ZOU Xiaoyong   

  1. (1.College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology (the 2011 Plan of Hunan Province),Jishou University,Jishou 416000,Hunan China;3.Key laboratory of Mineral Cleaner Production and Green Functional Materials Exploitation in Hunan Province,Jishou University,Jishou  416000,Hunan China)
  • Online:2016-09-25 Published:2016-10-01


Ca and Mg ions were selectively removed from industrial manganese sulfate solution with mixture extractant of P507 and carboxylic acid A.The effects of parameters including initial pH of manganese sulfate solution,concentration and saponification of mixture extractant with mol ratio 1∶1 of P507 and carboxylic acid A,and phase ratio (O/A) were determined.The results showed that Ca and Mg ions were selectively removed under the following conditions of initial pH 2.3 of manganese sulfate solution,20% volume concentration of mixture extractant,20% saponification ratio,O/A=2∶1 phase ratio at 30  ℃,and the yield of manganese reached 83.9%.By treating the solution with carbon adsorption,condensation crystallization and desiccation,manganese sulfate monohydrate with Ca content 38.4 ppm and Mg content 41.7 ppm,which meets requirement of high-purity manganese sulfate,is obtained.

Key words: high-purity manganese (II) sulfate, P507 and carboxylic acid A, solvent extraction, impurity removal

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