Journal of Radioanalytical and Nuclear Chemistry

, Volume 157, Issue 1, pp 185–192 | Cite as

Kinetics of iron(III) bromide extraction with n-tributyl phosphate

  • W. Sanad
  • H. Flex
  • S. A. Marei


The equilibrium and rate of solvent extraction of FeBr2 complexes from HBr solutions into benzene solutions of tributyl phosphate (TBP) have been investigated. It is found that two reactions control the iron(III)-TBP extraction from hydrobromic acid solutions. From HBr activity of 1.2–1.55 (molarity based) the reaction is inverse third order with respect to the aqueous phase acidity. From HBr activity of 1.7–6 (molarity based) the reaction is first order in HBr concentration in the aqueous phase. Both of these reactions are first order for both Fe(III) and TBP. The rate constants for these reactions were calculated and the rate-controlling steps are discussed.


Iron Benzene Bromide Acidity Acid Solution 
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Copyright information

© Akadémiai Kiadó 1992

Authors and Affiliations

  • W. Sanad
    • 1
  • H. Flex
    • 1
  • S. A. Marei
    • 2
  1. 1.Nuclear Chemistry Department, Nuclear Research CentreAtomic Energy AuthorityCairo(Egypt)
  2. 2.Hot Laboratory CentreAtomic Energy AuthorityCairo(Egypt)

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