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Recovery of Rare Metals from Scrap of Rare Earth Intermetallic Compounds by Chemical Transport Process

Research Project

Project/Area Number 05555236
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 無機工業化学
Research InstitutionOsaka University

Principal Investigator

ADACHI Ginya  Osaka University, Faculty of Engineering, Professor, 工学部, 教授 (60029080)

Co-Investigator(Kenkyū-buntansha) SAKAGUCHI Hiroki  Osaka University, Faculty of Engineering, Research Associate, 工学部, 助手 (00202086)
IMANAKA Nobuhito  Osaka University, Faculty of Engineering, Research Associate, 工学部, 助手 (30192503)
MACHIDA Kenichi  Osaka University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00157223)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥13,800,000 (Direct Cost: ¥13,800,000)
Fiscal Year 1994: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥12,000,000 (Direct Cost: ¥12,000,000)
Keywordsvapor complexes / metal halide / chemical transport / rare earths / rare metals / dry separation / recovery / resources / 希土類気相錯体 / 金属ハライド / 気相輸送法 / 乾式分離法 / 分離・回収 / 資源の有効利用 / 金属間化合物
Research Abstract

A dry process for recovery of rare metals from (i) sludges of Sm_2Co_<17>, Nd_2Fe_<14>B,and LaNi_5 intermetallic compounds and (ii) fly ash of bitumen-in-water emulsion was investigated using chemical vapor transport along a given temperature gradient. Chlorine gas and aluminium chloride were used as a chlorinating agent and transporting agent, respectively, and rare metal chlorides were chemically transported via vapor complexes, RAl_nCl_<3+3n> (R=rare earths) and MAI_nCl_<2+3n> (M=Co, Ni, Mg) /
The sludges of intermetallic compounds were chlorinated at 1000゚C yielding the RCl_3 and MCl_2. By the transport reaction, rare earth chlorides were concentrated in the deposits in the higher temperature zone (800-900゚C) while CoCl_2 and NiCl_2 were in the lower temperature zone (500-700゚C) .Purity of each of the recovered chlorides was more than 99%. Chlorides of other transition metals were concentrated at the outlet of the reactor (below 350゚C) without any contamination for the recoveries. Y … More ields of Ni and Co were more than 99%after transport reaction for 6 hours, whereas those of La, Sm, Nd, and Dy were lower, i, e.27,39,59, and 68%, owing to the relatively low formation rate of RAl_nCl_<3+3n> complexes.
The fly ash of bitumen-in-water emulsion was chlorinated at 500-600゚C.Vanadium in the ash was thoroughly extracted as chloride and condensed at the temperature zone<80゚C without using the transporting agent, Al_<>Cl_6 (g) , only by chlorination at 500゚C.Nickel and magnesium chloride which are less volatile were chemically transported via the vapor complexes. The yields of Ni and Mg were 67 and 91%, respectively, whereas 27 and 0.1% in the absence of the aluminium chloride. When a linear temperature gradient was employed, the deposition of the NiCl_2 at the temperature range 210-400゚C was overlapped with that of MgCl_2 at 170-400゚C.On the contrary, the use of a temperature gradient with a constant temperature zone at 410゚C rendered it possible to separate mutually the NiCl_2 and MgCl_2.
In order to postulate the structure of RAl_3Cl_<12> vapor complexes, Raman spectra of molten RCl_3-AlCl_3 mixture was carried out. The spectra shows the coordination of the rare earth is 9-fold for Nd and 8-fold for Gd, suggesting the same coordination number for NdAl_3Cl_<12> and GdAl_3Cl_<12> vapors. Less

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Kuniaki Murase: "Rare Earth Separation using a Chemical Vapor Transport Process Mediated by Vapor Complexes of the LnCl_3-AlCl_3 System" Journal of Alloys and Compounds. 198. 31-38 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 足立吟也: "金属ハロゲン化物気相錯体とその応用" 化学. 48. 650-651 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kuniaki Murase: "Recovery of Nickel and Vanadium from a Fly-Ash of Bitumen-in-Water Emulsion by Chemical Vapor Transport" Chemistry Letters. 1994. 1845-1848 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kuniaki Murase: "Vapor Phase Extraction and Mutual Separation of Rare Earths from Monazite using Chemical Vapor Transport" Chemistry Letters. 1994. 1297-1300 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kuniaki Murase: "Raman Spectra of Liquids and Glasses in the RCl_3-AlCl_3 (R=Nd,Gd) Systems" Journal of Non-Crystalline Solids. 180. 88-90 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kuniaki Murase: "Recovery of Rare Metals from Scrap of Rare Earth Intermetallic Material by chemical Vapor Transport" Journal of Alloys and Compounds. 217. 218-225 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Murase, K.Shinozaki, Y.Hirashima, K.Machida, and G.Adachi: "Rare Earth Separation Using a Chemical Vapor Transport Process Mediated by Vapor Complexes of the LnCl_3-AlCl_3 System" Journal of Alloys and Compounds. 198. 31-38 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] G.Adachi and K.Murase: "Metal Halide Vapor Complexes and Their Application" Kagaku. 48. 650-651 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Murase, K.Machida, and G.Adachi: "Vapor Phase Extraction and Mutual Separation of Rare Earths from Monazite Using Chemical Vapor Transport Mediated by Vapor Complexes" Chemistry Letters. 1994. 1297-1300 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Murase, K.Nishikawa, K.Machida, and G.Adachi: "Recovery of Nickel and Vanadium from a Fly Ash of Bitumen-in-Water Emulsion by Chemical Vapor Transport" Chemistry Letters. 1994. 1845-1848 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Murase, G.Adachi, G.D.Zissi, S.Boghosian, and G.N.Papatheodorou: "Raman Spectra of Liquids and Glasses in the RCl_3-AlCl_3 (R=Nd, Gd) Systems" Journal of Non-Crystalline Solids. 180. 88-90 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Murase, K.Machida, and G.Adachi: "Recovery of Rare Metals from Scrap of Rare Earth Intermetallic Material by Chemical Vapor Transport" Journal of Alloys and Compounds. 217. 218-225 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 邑瀬邦明: "化学気相輸送法を用いた希土類元素の相互分離" 希土類. 24. 162-163 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kuniaki Murase: "Vapor phase extraction and mutual separation of rare earths from monazite using chemical vapor transport" Chemistry Letters. 1994. 1297-1300 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kuniaki Murase: "Recovery of nickel and vanadium from a fly ash of bitumen-in-water emulsion by chemical vapor transport" Chemistry Letters. 1994. 1845-1848 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kuniaki Murase: "Raman spectra of liquids and glasses in the RCl_3-AlCl_3(R=Nd,Gd)system" Journal of Non-Crystalline Solids. 180. 88-90 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kuniaki Murase: "Recovery of rare metals from scrap of rare earth intermetallic material by chemical vapour transport" Journal of Alloys and Compounds. 217. 218-225 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 邑瀬 邦明: "化学気相輸送法によるゼノタイム精鉱からの希土類の分離" 希土類. NO.22. 182-183 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Kuniaki Murase: "Rare Earth Separation using a Chemical Vapor Transport Process Mediated by Vapor Complexes of the LnCl_3-AlCl_3 System" Journal of Alloys and Compounds. 198. 31-38 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Kuniaki Murase: "Recovery of Rare Metals from Scrap of Rare Earth Intermetallic Material by a Chemical Vapor Transport" (発表予定).

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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