反応媒体塩中のチタン塩化物の還元メカニズム Reduction Mechanism of TiCl_4 in Reaction Mediator Salt

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著者

    • 岡部 徹 OKABE Toru H.
    • 東北大学 素材工学研究所 Research Center for Metallurgical Process Engineering, Institute for Advanced Materials Processing(SOZAIKEN), Tohoku University
    • 宇田 哲也 UDA Tetsuya
    • 東北大学大学院・日本学術振興会特別研究員 Research Center for Metallurgical Process Engineering, Institute for Advanced Materials Processing(SOZAIKEN), Tohoku University
    • 早稲田 嘉夫 WASEDA Yoshio
    • 東北大学 素材工学研究所・素材再生プロセス研究センター Research Center for Metallurgical Process Engineering, Institute for Advanced Materials Processing(SOZAIKEN), Tohoku University

抄録

In order to facilitate better understanding of the mechanism of reduction of TiCl4 by Mg in a reaction mediator salt, TiCl4 was injected in to a molten salt mixture containing Dy2+ ions. The salt mixture was equilibrated with a Mg-Ag-Ni alloy kept in a tube and isolated from TiCl4. Fine titanium powder was produced in the molten salt without any physical contact between Mg reductant and TiCl4. During the reduction experiment, the oxidation-reduction potential(ORP) of the molten salt mediator, and the electrochemical potential of the injection tube relative to Mg/Mg2+ reference electrode were continuously monitored. Based on the result obtained, reaction pathways for titanium chloride in the salt mediator are discussed. The new concept of an electronically mediated reaction(EMR) is outlined with the aid of isothermal chemical potential diagrams. Although the overall reduction reaction can be represented in terms of neutral species, as in the conventional treatment of the Kroll process, the electrochemical analysis using the i-E diagram gives a better insight into the mechanistic aspects of the reduction involving the movement of ions and electrons.

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan  

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 114(8), 573-579, 1998-08-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10002467960
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    4555454
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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