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Kinetic study of Ce4+ extraction with Cyanex 923

Yu Gh, Yue St, Li Dq, Feng Yy

Abstract

Ce4+ extraction rate from aqueous sulphate solutions by Cyanex923 in heptane was studied using a constant interfacial cell with laminar flow at 30 degreesC. The experimental hydrodynamic conditions were chosen and the contribution of diffusion to the measured rate of reaction was minimized. Cerium extraction rate was measured at different chemical composition by varying the concentrations of hydrogen ion, sulphate and Cyanex923. A cerium-Cyanex923(B) extractive is formed at the interface. The data were analyszed in terms of pseudo-first order constants and a reaction mechanism was developed.

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Available abstract

Key concepts: Cerium, Extraction (chemistry), Chemistry, Reaction rate constant, Aqueous solution, Laminar flow, Diffusion, Analytical Chemistry (journal)