Anion-exchange separations in HCL media for the ultra-high purification of cobalt

Tamas Kekesi, Masahito Uchikoshi, Koji Mimura, Minoru Isshiki

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Anion exchange in HCl media is considered an efficient alternative to the combination of the conventional purification methods. Anion-exchange distribution functions have been determined for cobalt and the main impurity elements by the technique of batch equilibration. Results were confirmed by spectrophotometric investigations and elution tests. Based on the new and the available distribution functions, combined with the assessment of thermodynamic stability, a procedure of anion exchange separation has been devised to eliminate virtually all the impurities from the cobalt-chloride solution. Separation of copper has been enhanced by the introduction of a preliminary step under reduced conditions. The rest of the impurities are eliminated in a second anion-exchange step applying rinsing and elution stages under oxidized conditions. The optimum parameters of the procedure have been determined according to performance characteristics (purification ratios, yields and volume efficiencies) derived from the analysis of elution curves obtained with laboratory scale ion-exchange columns. Special computer programs have been developed to facilitate thermodynamic simulation, analytical correction and data processing.

本文言語English
ホスト出版物のタイトルYazawa International Symposium
ホスト出版物のサブタイトルMetallurgical and Materials Processing: Principles and Techologies; Aqueous and Electrochemical Processing
編集者F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn, F. Kongoli, K. Itagaki, C. Yamauchi, H.Y. Sohn
ページ211-225
ページ数15
出版ステータスPublished - 2003 10 16
外部発表はい
イベントYazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Aqueous and Electrochemical Processing - San Diego, CA, United States
継続期間: 2003 3 22003 3 6

出版物シリーズ

名前Yazawa International Symposium: Metallurgical and Materials Processing: Principles and Techologies; Aqueous and Electrochemical Processing
3

Other

OtherYazawa International Symposium: Metallurgical and Materials Processing: Principles and Technologies; Aqueous and Electrochemical Processing
国/地域United States
CitySan Diego, CA
Period03/3/203/3/6

ASJC Scopus subject areas

  • 工学(全般)

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