A study of cerium extraction by TBP and TODGA using a rotating diffusion cell

For the study of the coupled interfacial-mass transfer kinetics of, inter alia, TBP, TODGA, CyMe₄-BTBP and CyMe₄-BTPhen based solvent extraction processes, a new rotating diffusion cell (RDC) apparatus has been established at Lancaster University. RDC studies of Ce(IV)/TBP and Ce(III)/TODGA extraction systems have been undertaken in order to improve the understanding of the chemical and kinetic processes involved. In each case, an interesting dependency on local hydrodynamics at the solution phase boundary with results suggesting that the organic extractant molecules migrate into the aqueous phase in order to capture Ce.