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Mechanism of Degradation of Liquid Membranes and Washout Characteristics of the Membrane Liquids

Research Project

Project/Area Number 60550663
Research Category

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

Allocation TypeSingle-year Grants
Research Field 化学工学
Research InstitutionNagoya University

Principal Investigator

TAKEUCHI Hiroshi  Nagoya University, 工学部, 助教授 (40043286)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Katsuroku  Nagoya University, 工学部, 助教授 (20023278)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1986: ¥700,000 (Direct Cost: ¥700,000)
KeywordsLiquid membrane separation / Multiple emulsion / Supported liquid membrane / Surfactant / Membrane stability / Porous polymer / Wettability / Permeation / Osmotic pressure / Permeability / Mass transfer coefficient
Research Abstract

Present study is concerned with separation technique using liquid surfactant membranes(ELM) and supported liquid membranes(SLM).
[1] The entrainment of water by emulsified dropletes was examined as well as the droplet breakdown for organic solvent-Span 80 systems. The breakdown of toluene membranes is more than those of higher parafinic hydrocarbons by a factor of 10. Thus it can be concluded that n-dodecane is most suitable as the solvent for ELMs.
[2] Stabilities of SLMs impregnated with various organic solvents were tested in terms of the breakthrough time; the results show that the solvent having higher interfacial tension is more stable to washing out of the membrane liquids. Effect of materials and morphology of solid supports on the SLM-stability was examined from the contact angle <theta> of aqueous drop on SLMs. An extrapolating value to cos <theta> ->1 on a plot of cos <theta> versus contact time was introduced as a "critical wetting time", which can quantify the degradation of … More SLMs.
[3] Liquid side mass transfer coefficient, <k_c> , in the flow channel through a SLM-device was determined for two types of SLM; flat sheet and hollow fiber modules. The <k_c> -values for the flat type SLM agree well with a theoretical equation for flat plate, while the external <k_c> of the hollow fiber was five to ten times as large as those for the flat plate. Transport coefficients for solute diffusion through the membrane liquid layer have no significant difference among the support polymers having various porosity.
[4] In order to obtain higher recovery in SLM-operation, a multilayered flat type SLM was tested for the separation of Cr(VI) from the acid solutions. The addition of Cr(VI) to the stripping solution results in a remarkable improvement of the recovery due to the buffer effect.
[5] To enlongate the life-time of SLMs, a regeneration mode of the membrane phase in SLMs was proposed, which utilized a buoyant force of membrane liquid and capillary action. The continuous regenerating SLM was demonstrated for the separation of heavy metals by use of a single hollow fiber module, and also the applicability to a multi-fiber module was confirmed. Less

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 高橋正博ら: 化学工学論文集. 11. 628-633 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K.Takahashi etal: J.of Chem.Eng.of Japan. 19. 161-166 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K.Takahashi etal: World Congress 【III】 of Chem.Eng.【II】. 782-789 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 坪井勝巳: 化学工学論文集. 13. 110-113 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] M.Nakano etal: J.of Chem.Eng.Jpane. 20. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] H.Takeuchi etal: J.of Membrane Sci.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 竹内寛: "液膜による分離技術の進歩、化学工学シンポジウムシリーズ12 12章:含浸型液膜の安定性及びイオン透過速度" 化学工学協会「液膜による分離プロセスの開発」研究会, 10 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Takahashi: "Behavior of Interfacial Tension during Copper Extraction by LIX65N" J. of Chemical Engineering of Japan. 19. 161-166 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Tsuboi: "A Study on Water Permeation in (W/O)/W Emulsions" Kagaku Kogaku Ronbunshu. 13. 110-113 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] M. Nakano: "A Method for Continuous Operation of Supported Liquid Membranes" J. of Chemical Engineering of Japan. 20. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] K. Takahashi: "Mass Transfer Coefficients in a Flat Type Supported Liquid Membrane" Kagaku Kogaku Ronbunshu. 13. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] H. Takeuchi: "Some Observation on the Stability of Supported Liquid Membranes" J. of Membrane Science.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] H. Takeuchi: Society of Chemical Engineering of Japan. Stability and Permeation Flux of Ion in Supported Liquid Membranes (Section 8, Chemical Engineering Symposium Series, No.11), 10 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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