Using the model, the effects of independently varying the diffusion coefficient, the external mass transfer coefficient and the reaction rate constants were analysed in order to provide a further understanding of the mechanisms that control the reactive extraction process. Fig. 9 (a, b and c) shows the effect of independently increasing the reaction rate constants, the diffusion coefficient and the external mass transfer coefficient respectively. The higher reaction rates of Komers et al.and Vicente et al. were also used as a comparison.