• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Fundamental study on separation of rate earth metals

Research Project

Project/Area Number 01045014
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionUniversity-to-University Cooperative Research
Research InstitutionNagoya University

Principal Investigator

OKI Takeo  Faculty of Engineering, Nagoya University, Professor, 工学部, 教授 (30023039)

Co-Investigator(Kenkyū-buntansha) 王 淀佐  中南工業大学(中華人民共和国), 教授
鄭 蒂基  中南工業大学(中華人民共和国), 教授
鍾 海雲  中南工業大学(中華人民共和国), 教授
張 啓修  中南工業大学(中華人民共和国), 副教授
ICHINO Ryouichi  Faculty of Engineering, Nagoya University, Research Associate, 工学部, 助手 (70223104)
YAMAUCHI Chikabumi  Faculty of Engineering, Nagoya University, Professor, 工学部, 教授 (40115647)
XIU Zhang-qi  Central South University of Technology in China, Assistant Professor
YU Zhong-hai  Central South University of Technology in China, Professor
ZHUO Wang-dian  Central South University of Technology in China, Professor
JI Zheng-di  Central South University of Technology in China, Professor
左 鉄〓  中南工業大学, 教授
鐘 海雲  中南工業大学, 助教授
興戸 正純  名古屋大学, 工学部, 講師 (50126843)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 1991: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1990: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1989: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsRare earth metals / electrolyte in molten salts / electrorefining / Nd-Fe alloy / Graphite electrode / anode reaction / 希土類金属
Research Abstract

The electrochemical reduction of Zr and Hf In alkali chloride and alkali fluoride-chloride molten salts has been Investigated by linear and cyclic voltammetry. It has been found that fluoride ions greatly Influenced the reduction of Zr and Hf and that the mechanism for reduction of Zr and Hf in a low concentration fluoride ion baths is different from that in a higher fluoride Ion bath. The mechanism for reduction of La and Nd at a low or a higher concentration of fluoride ion is the same as the above. It is found that the separation of ir from Hf and La from Nd could be possible by controlling the concentration of fluoride Ion and the potential of deposition.
The reduction behaviour of Nd on Fe electrode in fluoride molten salts is -different from that on Ta electrode-in the number of peaks In voltammogram.
The anodic behaviors of the graphite electrodes In fluoride molten salts with or without Nd_2O_3 have been Investigated by the same methods. It has been found that the voltammogram can be divided Into three regions : the first region Is associated with the CO and CO_2 evolution, the second with the passivation and the third Is related with CF_4. The voltammogram In the electrolyzed fluoride molten salts with Nd_2O_3 shows that the peak currents related to CF_4 formation greatly decreases. The addition of the oxides Into the bath Influenced strongly the anodic behaviors.
The separation techniques of rare-earths in China are now solvent extraction process and ion-exchange method. These are developing In equipment and extractant. Because the components of row rare-earths minerals and condition of chemicals are different In different area, and then chinese ores of rare-earths are not ordinary minerals, Ion adsorbed rare-earths ore, so the extractant uses Individual ones In each case.

Report

(2 results)
  • 1991 Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 陳 光森: "各種電極の溶融塩電解法によるレア・ア-ス金属分離への影響について" 資源・素材'89平成元年度資源・素材関係学協会 合同秋季大会,分科研究会資料,〔K〕レアメタルと新素材. K. 21-24 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] C.Guang-sen: "Electrochemical studies of Zirconium and Hafnium in Alkali Chloride and Alkali Fluoride-Chloride molten salts," J.Applied Electrochemistry. 20. 77-84 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 陳 光森: "溶融塩不均化反応によるセラミックスのメタライズについて" 資源・素材学会 1990年春季大会 研究・業績発表講演会要旨集. 243-244 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 陳 光森: "フッ化物溶融塩中におけるNdの電気化学的挙動" 資源・素材'90 平成2年度資源・素材関係学協会 合同秋季大会 分科研究会資料〔O〕素材・新素材 I. O. 19-21 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Liu Xinyu: "Effects of Abnormal Recrystallization of Doped Molybdenum wire on the Toughness at room temperature" Proc.of the International Symposium on Processing of Rare metals,Rare Metals'90. 339-342 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Zuo Tieyong: "Application of Rare Earth Metal in Nonferrous Metallic Materials," Proc.of the International Symposium on Processing of Rare metals,Rare Metals'90. 367-372 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Liu Xinyu: "A Study on the Recovery and Recrystallization of Doped Tungsten wires" Proc.of the International Symposium on Processing of Rare metals,Rare Metals'90. 409-412 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] C.Guang-sen: "Effects of Oxide on Anodic Behaviour of Graphite Electrodes in Fluoride Molten Salts," Proc.of the 3rd International symposium of Molten Salts in Paris. 401-407 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 陳 光森: "フッ化物溶融塩中におけるFeーNdの電解生成およびグラファイト極のアノ-ド挙動について" 資源・素材学会 1991年春季大会 研究・業績発表講演会要旨集. 257-258 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 沖 猛雄: "フッ化物浴ネオジウム電解における酸化物の影響" 資源・素材'91 平成3年度資源・素材関係学協会 合同秋季大会 分科研究会資料,〔N〕新素材・新材料. N. 65-68 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 王 立鐸: "希土ほう化処理したS45C鋼のほう化層におけるCeの分布と微視組織" 熱処理. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Guang-sen Chen: "Effects of Electrode Materials on Electrolytic Separation of the Rare Earth Metals in Molten Salts" The 1989 fall meeting of MMIJ, Rare Metal and New Material. K. 21-24 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Guang-sen Chen: "Electrochemical Studies of Zirconium and Hafnium in Alkali Chloride and Alkali Fluoride-Chloride Molten Salts" J. Applied Electrochemistry. 20. 77-84 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Guang-sen Chen: "Studies on Metallization of Ceramics Using the Disproportionation Reactions in the Molten Salts" The 1990 spring meeting of MMIJ. Processing of New Materials. 243-244 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Guang-sen Chen: "Electrochemical Behaviour of Nd in Fluoride Molten Salts" The 1990 fall meeting of MMIJ. Materials Processing. O. 19-21 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Liu Xinyu: "Effects of Abnormal Recrystallization of Doped Molybdenum Wire on the Toughness at Room Temperature" Proc, of the International Symposium on Processing of Rare metals, Rare Metals '90. 339-342 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Zuo Tieyong: "Application of Rare Earth Metal in Nonferrous Metallic Materials" Proc. of the International Symposium on Processing of Rare metals, Rare Metals '90. 367-372 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Liu Xinyu: "A Study on the Recovery and Recrystallization of Doped Tungsten Wires" Proc. of the International Symposium on Processing of Rare metals, Rare Metals '90. 409-412 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Guang-sen Chen: "Effects of Oxide on Anodic Behaviour of Graphite Electrodes in Fluoride Molten Salts" Proc. of the 3rd International symposium of Molten Salts in Paris. 401-407 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Guang-sen Chen: "On the Electrolysis of Fe-Nd Alloy and Anodic Behaviours of Graphite Electrode in Fluoride Molten Salts" The 1991 spring meeting of MMIJ, New Materials/Rare Metals. 257-258 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Takeo Oki: "Effects of Oxides on Electrolysis of Nd in Fluoride Molten Salts" The 1991 fall meeting of MMIJ, New Materials. N. 65-68 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Li-duo Wang: "Distribution of Ce and Microstructure in the Rare-Earth-Borided Layer on S45C Steel" J. the Japan Soc. for Heat Treatment, Printing. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] G.Chen: "Electrochemical Studies of zirconium and Hafnium in Alkali chloride and Alkali Fluorideーchloride Molten Sdts" J.Applied Electrochemistry. 20. 77-84 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 陳 光森: "フッ化物溶融塩中におけるNdの電気化学的研究" 資源素材学会秋期大会概要集. 01-6 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] G. Chen: "Effects of Oxide on Anodic Behaviours of Graphite Electrodes in Fluoride Molten Salts" Proc.of rhe 3rd International Symposium on Molten Salts. 発表予定 7月 1990年 パリ. (1990)

    • Related Report
      1990 Annual Research Report

URL: 

Published: 1989-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi