Abstract

ABSTRACTKinetics of the extraction of V(IV) from acidic sulfate medium by Cyanex 301 dissolved in kerosene has been investigated using a constant interfacial area stirred cell with laminar flow (Lewis cell). Reaction orders with respect to different concentration terms, rate constant, activation energy, entropy change in activation, and the enthalpy change in activation have been measured at a phase circulation speed of 3 Hz. The rate equation at 293 K is F (kmol/m2s) = 10−7.02 (1 + 0.025[V(IV)]−1)−1 (1 + 398[H+])−1 (1 + 0.10 [HA]o−1)−1 (1 + 3.16 [SO42−]). Based on the experimental results, the mechanism of extraction has been proposed.

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