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Direct Photometric Measurement of Interfacial Reaction in Solvent Extraction Systems

Research Project

Project/Area Number 02640433
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 分析・地球化学
Research InstitutionAkita University

Principal Investigator

WATARAI Hitoshi  Akita University, Faculty of Education, Professor, 教育学部, 教授 (30091771)

Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsSolvent extraction / Interfacial reaction / Chelate extraction kinetics / Synergistic extraction kinetics / Microemulsion / Porphyrins / Interfacial potential / Liquid membrane
Research Abstract

The interfacial reaction in solvent extraction systems was investigated by means of the high-speed stirring method and direct photometric measurement of the interface. The followings were elucidated in the present study ;
1. The rate-controlling step of the extraction of CU (II) and NI (II) with 2'-hydroxy-5'-nonylbenzophenone oxime was the formation of 1 : 1 complex between the anion of the extractant and the metal ions which occurred at interface. The solvent effect of heptane and chloroform was also discussed.
2. The synergistic extraction rate of NI (II) with dithizone and 1, 10-phenanthroline (phen) was measured by using a photodiode-array detector. Under the conditions of higher concentration for phen than that for dithizone, an intermediate complex was formed at the interface.
3. The direct measurements of interfacial spectra were made for the next three systems ;
(1) The dissociation constants of beta-diketones were determined in anionic, cationic and nonionic o/w microemulsions. The medium effect for the dissociation constants was explained in terms of the electrostatic effect of the surface charge on the adsorption of beta-diketonates.
(2) The optical cell for the measurement of absorption spectra of the dispersed systems by stirring was made and the interfacial protonation of tetraphenylporphine (TPP) at toluene/ sulfuric acid system was investigated. Experimental results showed the formation of diprotonated TPP and its aggregate at the interface.
(3) Interfacial spectra of liquid membrane was observed by using Teflon filter or Teflon sheet as the supporting material. The interfacial protonations of TPP and a Rhodamine B derivative were measured by this method. This approach is now applied for the measurements of an interfacial kinetics and an electric field effect on interfacial reaction.

Report

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

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Watarai: "Interfacial Kinetics in the extraction of copper(II)and nickel(II)with2'-hydroxy-5'-nonylbenzophenone Oxime" Anal.Sci.,. 7. 137-140 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai: "Role of interface in the kinetics of synergic extraction of nickel(II)-dithizone-1,10-phenanthroline complex" Proceedings of International Solvent Extraction Conference '90.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai: "Tautomerization and dissociation equilibria of β-diketones in microemulsions" Bull.Chem.Soc.Jpn.,. 65. 170-174 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai: "Adsorption and aggregation of diprotonated tetraphenylporphine at liquid-liquid interface" Chem.Lett.,.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai and M. Endoh: ""Interfacial kinetics in the extraction of copper (II) and nickel (II) with 2'-hydroxy-5'-nonylbenzophenone oxime"" Anal. Sci.7(2). 137-140 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai: ""Role of interface in the kinetics of synergic extraction of nickel (II)-dithizone-1, 10-phenanthroline complex"" Proceedings of International Solvent Extraction Conference '90.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai, M. Takano and N. Suzuki: ""Tautomerization and dissociation equilibria of beta-diketones in microemulsions"" Bull. Chem. Soc. Jpn.65(1). 170-174 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Watarai: ""Adsorption and aggregation of diprotonated tetraphenylporphine at liquid-liquid interface"" Chem. Lett.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H.Watarai: "Role of interface in the Kinetics of synergic extraction of nickel(II)ーdithizoneー1,10ーPhenanthroline complex" Proceedings of International Solvent Extraction conference'90.

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Watarai: "Tautomerization and dissociation eguilibria of βーdiketones in microemulsions" Bull.Chem.Soc.Jpn.,. 65. 170-174 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Watarai: "Adsorption and aggregation of diproted tetraphenylporphine at liguidーliguid interface" Chem.Lett.

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Watarai M.Endoh: "Interfacial Kinetics in the Extraction of Copper(II)and Nickel(II)with 2'ーHydroxyー5'ーnonylbenzophenone Oxime" Analytical Sciences. 7. 137-140 (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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