Purification of Manganese Chloride with Chelating Resin Containing Iminodiacetate Groups in Ammonium Chloride Solution

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  • Uchikoshi Masahito
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Kawai Koutarou
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Sasagaki Michihito
    Osaka Asahi Metal Mfg. Co., Ltd.
  • Mimura Kouji
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Isshiki Minoru
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

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The demand for high-purity Mn is growing in the field of advanced electronics devices. Chromatographic separation using chelating resins is useful for pre-concentration of metal ions prior to the determination of metallic elements by chemical analysis. This separation technique can be applied to the recovery of hazardous substances from industrial waste. In the present study, this separation technique was applied to the purification of Mn for the first time. Separation was carried out in an ammonium chloride medium because Mn can be recovered by electrowinning in the final step. Ammonium chloride added to the electrolyte is useful for improving the current efficiency during electrowinning of Mn. The optimum separation process was examined according to the recovery ratio of Mn and the elimination ratio of each impurity derived from the elution curves.

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