Abstract
A study on the type-2 liquid-liquid equilibrium (LLE) behavior of the {water + valeric or caproic acids + acetate esters (n-propyl, isopropyl, n-amyl, and n-hexyl acetates)} ternary systems was performed at T = 298.2 K and p = 101.3 kPa. Solubility and tie line data were experimentally determined using cloud point and HPLC methods, respectively. The results were validated through acid-base and Karl-Fisher titrator methods. The quality of the experimental tie lines was checked using the Hand equation. For these systems, the thermodynamic models of NRTL and UNIQUAC were successfully applied to fit the experimental tie lines and the values of the binary interaction parameters were obtained. Evaluation of the solvents capacity was performed using the calculation of distribution coefficients and separation factors. The influence of chemical structure of the chosen esters on the immiscibility region was found to be almost small. As a result, all the chosen acetate esters have relatively high separation factors ...
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