Ternary and Quaternary Liquid + Liquid Equilibria for Systems of (Water + Toluene + m-Xylene + Phenol)
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Thermodynamic Research Laboratory, Kashan University, Kashan, Iran
Abstract
Tie line data for ternary systems containing phenol (C6H6O), water (H2O), toluene (C7H8), and m-xylene (C8H10) were investigated. Phase diagrams of ternary systems of {w1 C7H8 + w2 C6H6O + (1 − w1 − w2) H2O} and {w1 C8H10 + w2 C6H6O + (1 − w1 − w2) H2O} at 298.15 and 303.15 K were reported. The quaternary system {w1 C8H10 + w2 C7H8 + w3 C6H6O + (1 − w1 − w2 − w3) H2O} was also studied at 303.15 K. The experimental liquid−liquid equilibrium data have been correlated using the UNIQUAC and NRTL activity coefficient models, and the binary interaction parameters of these components have been presented. The correlated tie line results have been compared with the experimental data. The comparisons indicate the superiority of the NRTL activity coefficient model to UNIQUAC for liquid−liquid equilibrium correlation of studied systems. The tie line data of the studied systems also were correlated using the Hand method.
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Corresponding author. E-mail: [email protected].
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