Abstract
The rate of extraction of copper (II) from acid nitrate solutions with LIX 64N was studied in a single drop reaction cell in which experimental conditions were conrrolled so that the back reaction kinetics were unimportant. Under these conditions the extraction reaction was found to be first order with respect to the cupric ion concentration, half order with respect to the concentration of the α-hydroxy oxime component of LIX 64N, and half order with respect to the concentration of the hydroxy-benzophenone oxime component of LIX 64N. Detailed consideration of the experimental results and the hydrodynamics of a falling drop system suggests that a surface reaction mechanism is rate controlling and that the reaction rate is not limited by mass transfer. The apparent activation enthalpy of approximately 6.5 kcal/mole (27.2 kJ/mole) was found to be essentially independent of the variables considered.
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Atwood, R.L., Thatcher, D.N. & Miller, J.D. Kinetics of copper extraction from nitrate solutions by LIX 64N. Metall Trans B 6, 465–473 (1975). https://doi.org/10.1007/BF02913834
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DOI: https://doi.org/10.1007/BF02913834