Journal of Radioanalytical and Nuclear Chemistry

, Volume 147, Issue 2, pp 287–295 | Cite as

Synergistic extraction of uranium(VI) with 1-phenyl-3-methyl-4-acylpyrazolone-5 and neutral extractants

  • Mao Jia-Jun
  • Jia Wei-Jie
  • Shao Xing-Zhi
  • Chen Yu-De


The synergistic extraction of uranium(VI) from hydrochloric acid solution with five chelating agents: 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (PMBP), 1-phenyl-3-methyl-4-acetylpyrazolone-5 (PMAP), 1-phenyl-3-methyl-4-(2′-chlorobenzoyl)pyrazolone-5 (PMCBP), 1-phenyl-3-methyl-4-(p-nitrobenzoyl)pyrazolone-5 (PMNBP) and 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (PMTFP) plus the neutral extractants tributylphosphate (TBP), dioctyl sulfoxide (DOSO) and trioctylphosphine oxide (TOPO) in chloroform has been investigated. The extraction coefficients have been found to be greater for such mixtures than the individual component. The formulas of the extracted species have been determined to be UO2A2B (where HA = chelating agent, B = neutral extractant). Extraction power of these chelating agents increases as follows: PMCBP>PMNBP>PMTFP=PMBP>PMAP. Synergistic extraction power of the neutral extractants increases as follows: TOPO>DOSO>TBP. The extraction equilibrium constants have been calculated. The mechanism of the synergistic extraction and possible structure of the extracted species are discussed.


Uranium Hydrochloric Acid Topo Hydrochloric Acid Solution Chelate Agent 
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Copyright information

© Akadémiai Kiadó 1991

Authors and Affiliations

  • Mao Jia-Jun
    • 1
  • Jia Wei-Jie
    • 1
  • Shao Xing-Zhi
    • 1
  • Chen Yu-De
    • 1
  1. 1.Department of Nuclear ScienceFudan UniversityShanghai(PR China)

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