Kinetics of extraction of uranium from phosphoric acid by D2EHPA–TBP and D2EHPA–TOPO systems using constant interfacial area stirred cell

• Method to measure rate of transfer of rare earth ions between two phases.
• Systematic study of kinetics using constant interfacial area stirred cell.
• Simultaneous estimation of intrinsic kinetics and mass-transfer coefficients.

The uranium extraction kinetics with Di-2-Ethyl Hexyl Phosphoric Acid-Tri Butyl Phosphate (D2EHPA–TBP) and Di-2-Ethyl Hexyl Phosphoric Acid-Tri Octyl Phosphine Oxide (D2EHPA–TOPO) dissolved in dodecane has been investigated. The objective of the present study was to identify the reaction location, reaction regime, reaction orders with respect to the reactants and the intrinsic rate constant of the reaction. Experiments were carried out in a constant interfacial area stirred cell and the parameters were varied over a range of 1