Chinese Journal of Applied Chemistry ›› 1996, Vol. 0 ›› Issue (3): 90-92.

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Synergic Extraction of Lanthanide Ions by Bis-(1′-Phenyl-3′-methyl-5′-Pyrazol one-4′-yl)Ethanedione and Phenanthroline

Zhang Anyun, Qian Bo, Gao Gailing, Pei Jing, Wang Zichun   

  1. Department of Chemistry, Shaanxi Normal University, Xi'an 710062
  • Received:1995-08-18 Revised:1996-01-18 Published:1996-06-10 Online:1996-06-10

Abstract: The extraction of lanthanide ions(La3+,Pr3+,Nd3+,Gd3+)from nitric acid solution with mixtures of bis-(1′-phenyl-3′-methyl-5′-pyrazolone-4′-yl)ethanedione (H2BPMPED or H2A)and phenanthroline(phen)has been studied.The synergic extraction coefficent of neodymium is 3.56.The composition of extracted compound of neodymium is shown to be NdA·HA·phen.The pH values of half extraction of La3+,Pr3+,Nd3+,Gd3+ are 4.12,3.74,3.46,3.11 respectively.The extraction equilibrium constants enthalpy change and entropy change of the reaction have been calculated.

Key words: bis-(phenyl-methyl-pyrazolone-yl)ethanedione, phenanthroline, synergic extraction, lanthanide