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CRYSTALLIZATION OF METAL SULFATE BY USE OF WATER MISCIBLE ORGANIC SOLVENT

Research Project

Project/Area Number 60850122
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 金属精錬・金属化学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

YAZAWA Akira  RESEARCH INSTITUTE OF MINERAL DRESSING AND METALLUARGY, TOHOKU UNIVERSIRY, 選鉱製錬研究所, 教授 (30006019)

Co-Investigator(Kenkyū-buntansha) MATSUBARA Eiichiro  RESEARCH INSTITUTE OF MINERAL DRESSING AND METALLUARGY, TOHOKU UNIVERSITY, 選鉱製錬研究所, 助手 (90173864)
OKADA Shigeru  RESEARCH INSTITUTE OF MINERAL DRESSING AND METALLUARGY, TOHOKU UNIVERSITY, 選鉱製錬研究所, 助手 (40006036)
Project Period (FY) 1985 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥10,000,000 (Direct Cost: ¥10,000,000)
Fiscal Year 1987: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1986: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1985: ¥4,000,000 (Direct Cost: ¥4,000,000)
KeywordsCrystallization / Alcohol / Mixed Solvent / Metal Sulfate / Solubility / 廃液処理 / アルコール晶析法 / 混合硫酸塩溶液 / 相互溶解度 / 分別晶析 / 有機溶媒 / エタノール / 重金属硫酸塩 / 硫酸ニッケル / 硫酸銅 / 銅電解
Research Abstract

THE PHASE RELATIONS AND SOLUBILITY ISOTHERMS HAVE BEEN DETERMINED FOR THE SYSTEMS : METAL SULFATE(S)-WATER-ORGANIC SOLVENT. THE POSSIBILITY OF CRYSTALLIZATION METHOD USIMG ORGANIC SOLVENT WAS CONSIDERD ON THE BASE OF RESULTS. IN THE SYSTEM MSO_4-H_2O-C_2H_5OH(M=Zn,Ni,Co,Cd,Cu), SOLUBILITY OF SULFATES DECREASED MEMARKABLLY WITH INCREASING CONCENTRATION OF ALCOHOL. EMPIRICAL FORMULAS WERE DETERMINED FOR THE SOLUBILITY OF THESE SULFATES IN WATER-ETHANOL MIXTURES IN THE TEMERATURE RANGE OF 278 TO 308K. AQUEUS-ALCOHOL MIXTURES WITH THESE SULFATES ARE LIABLE TO SEPARATE INTO TWO LIQUID LAYERS. DIFFERENCE IN SALTING OUT EFFECT OF CATION WERE DISCUSSED.
SOLVENT EFFECTS WERE EXAMINED WITH THE SYSTEMS ZINC SULFATE OT COPPER SULFATEWATER-ORGANIC SOLVENT AT 298K; USED ORGANIC SOLVENTS WERE METHANOL, 2-PRORANOL, T.-BUTANOL AND ACTONE. DEPENDENCE OF THE SULFATE SOLUBILITY ON THE DIELECTRIC CONSTANT OF THE MIXED SOLLVENT EXHIBITS DELICATE VARIATIONS BY THE COSOLVENT AND ITS COMPOSITION.
SOLUBILITY ISOTHERMS FOR THE MIXEd SULFATES of CuSO_4-NiSO_4 O R CoSO_4 IN AQUEOUS ETHANOL MIXTURES AT 298K, AND Na_2SO_4-NiSO_4 OR CoSO_4 IN AQUEOUS-METHANOL MIXTURES WERE DETERMINED. THE ISOTHERMS OF CuSO_4-NiSO_4 OR CoSO_4 SOLUTION SYSTEM CAN BE DEVIDED INTO 2 PORTIONS CORRESPONDING TO CRYSTALLIZATION OF COPPER SULFATE AND NICKEL SULFATE, OR SOLID SOLUTION OF (Co,Cu)SO_4,7H_2O. ON THE OTHER HAND, ISOTHERMS FOR THE MIXED SULFATE SYSTEMS OF Na_2SO_4-NiSO_4 OR CoSO4, ARE MADE UP OF 3 PORTIONS WITH TWO EUTECTIC POINTS ; SOLID PHASES IN EQULIBRIUM WITH THE SOLUTION IN EACH PORTIONS ARE SODIUM SULFATE, NICKEL SULFATE OF COBALT SULFATE, AND THEIR DOUBLE SALT. COMPOSITION RANGE OF THE SOLUTION CORRESPONDING TO THE DOUBLE SALT ARE SENSITIVE TO TEMPERATURE. A POSSIBLE APPLICATION TO A PRACTICAL PROCESS WAS TESTED WITH A COPPER SPENT ELECTROLYTE.
RESULTS OBTAINED SUGGEST THAT THE CRYSTALLIZATION METHOD USING ORGANIC SOLVENT MIGHT BE WELL APPLICABLE TO PRACTICAL PROCESSES.

Report

(3 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • 1985 Annual Research Report

Research Products

(12 results)

All Other

All Publications (12 results)

  • [Publications] late Motonori EGUCHI: Metallurgical Review of MMIJ. 2. 19-34 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 岡田 茂: 日本紘業会誌. 101. 739-744 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shigeru OKADA: Metallurgical Review of MMIJ. 3. 48-60 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 岡田 茂: 日本紘業会誌. 102. 597-601 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shigeru OKADA: 1st International Confereuce on Hydrometallurgy. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] MOTONORI, EGUCHI: "PHASE RELATION AND SOLUBILITY ISOTHERM IN THE SYSTEM ZnSO_4-H_2O-C_2H_5OH" METALL. REV. MMIJ.2. 19-34 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] SHIGERU, OKADA: "PHASE EQUILIBRIA IN THE TERNARY SYSTEMS OF ZINC OR COPPER SULFATE-WATER-ORGANIC SOLVENT" METALL. REV. MMIJ.3. 48-60 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] SHIGERU, OKADA: "SELECTIVE CRYSTALLIZATION FROM MIXED AQUEOUS SOLUTION BY USE OF ALCOHOL" 1ST INTERN.CONGR. ON HYDROMETALL, BEIJING. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shigeru Okada;Akira Yazawa: Metallur.Rev.of MMIJ. 3. 48-60 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 岡田茂,矢澤彬: 日本鉱業会誌. 102. 597-601 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Metallur.Rev.MMIJ. 2-2. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] 日鉱誌. 101-1173. (1985)

    • Related Report
      1985 Annual Research Report

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Published: 1987-03-30   Modified: 2016-04-21  

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