Modeling of Carrier-Mediated Extraction

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Abstract
A two parametric mathematical model of carrier-mediated extraction is proposed for the case when emulsion technique is applied. Its simplified version, valid for diluted solutions, is solved analytically, and an implicit expression relating both parameters—rate of solute transfer and rate of emulsion destruction—is derived. Model parameters were evaluated from the experimental data obtained with two different three-phase systems: oil-in-water-in-oil and water-in-oil-in-water. In the first case, toluene and heptene were separated using water as an intermediate phase, and parameter evaluation was performed by means of an analog computer. In the second case, acetic, nitric, and hydrochloric acids were separated using a solution of tributylphosphate in carbon tetrachloride as a carrier phase. In this case the rate coefficients were found from the proposed implicit equation.

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