Abstract
Liquid−liquid extraction based on reversible chemical complexation is a novel separation technique that is highly effective and selective for separating polar organic solutes from aqueous solutions. Equilibria of aqueous solutions of formic acid, acetic acid, propionic acid, butyric acid, caproic acid, monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, and lactic acid with trialkylphosphine oxide in kerosene were investigated. Equilibrium concentrations are given at 298 K. An extraction equilibrium model was used to describe the experimental data. Calculated organic acid concentrations in both phases are in good agreement with the experimental values
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