Solvent Extraction Behavior of Lanthanides with Di(2-Ethylhexyl) Isopropylphosphonate

  • Enxin Ma
  • Sanyi Wang
  • Fubing Wu
  • Chengye Yuan

Abstract

Investigations of the behavior of lanthanides in solvent extraction can contribute both to design an effective extraction systems for metal separation and particularly to the development of the lanthanide theory. Fidelis et al. (1,2) has studied the regularity of variation of thermodynamic functions in the process of lanthanide extraction. Recently, Siekierski (3) examined the position of Y, in respect to ΔG°, ΔH° and ΔS° of extraction and complex formation in the lanthanide series. As shown by our studies (4,5) the regularity of variation of the equilibrium constant, free energy and entropy change reveals a tetrad effect.

Keywords

Entropy Hydration Hydroxyl Acidity Yttrium 

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References

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    I. Fidelis and S. Siekierski, in Proceedings of the Tenth Rare Earth Research Conference, Vol. II, p 919 (1973).Google Scholar
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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Enxin Ma
    • 1
  • Sanyi Wang
    • 1
  • Fubing Wu
    • 1
  • Chengye Yuan
    • 1
  1. 1.Shanghai Institute of Organic GhemistryAcademia SinicaShanghaiChina

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