Abstract
The reactive extraction equilibria for aqueous solutions of glutaric acid, with trioctylamine (TOA) in various diluents, including isoamyl alcohol, octan-1-ol, nonan-1-ol, decan-1-ol, methyl ethyl ketone (MEK), diisobutyl ketone (DIBK), hexan-2-one, toluene, kerosene, and n-hexane, were determined at various TOA concentrations. Experimental results of batch extraction experiments are calculated and reported as distribution coefficients (KD), loading factors (Z), and extraction efficiency (E). All measurements were carried out at 25 °C. Kerosene was found to be the most effective diluent with the highest value of KD (7.88). The complexation constants K11 and K21 were calculated for each diluent. The results of the liquid−liquid equilibrium measurements were correlated by a linear solvation energy relationship (LSER) model which takes into account physical interactions and modified Freundlich and Langmuir equations. Experimental results of the glutaric acid extraction are compared to model results.
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