(Liquid + liquid) equilibrium data of (water + phosphoric acid + solvents) systems at T = (308.2 and 318.2) K |
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| Institution: | 1. Holy Spirit University of Kaslik, Faculty of Sciences, Dept. Chemistry Biochemistry, Group ThEA-Thermodynamic Phase Equilibria and Analysis, B.P. 446 Jounieh, Lebanon;2. Univ. Lyon, Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces, UMR 5615, F-69622 Lyon, France;3. Lebanese University, Faculty of Sciences II, Plateforme de Recherche en Sciences des Nanotechnologies, Campus Fanar, BP 90656 Jdeideh, Lebanon;4. Lebanese University, Faculty of Sciences, Dept. Chemistry Biochemistry, Group Analysis of Polyphase Systems ASP, Fanar, Beirut, Lebanon;5. Unité de Technologie et Valorisation Alimentaire, Faculté des sciences, Université Saint-Joseph, Campus des Sciences et Technologies, Mar Roukos, Mkallès, P.O. Box 11-514, Riad El Solh, 1107 2050 Beirut, Lebanon |
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| Abstract: | Ternary equilibrium data for the mixtures of {water + phosphoric acid + organic solvent (cyclohexane, methylcyclohexane, and toluene)} were determined at T = (308.2 and 318.2) K and atmospheric pressure. Solubility data were determined by the cloud-point titration method. In order to obtain the tie-line data, the concentration of each phase was determined by acidimetric titration, the Karl–Fischer technique, and refractive index measurements. The experimental tie-line data were correlated using the UNIQUAC and NRTL models. The reliability of the experimental data was determined through the Othmer–Tobias and Hand plots. Distribution coefficients and separation factors were evaluated over the immiscibility regions. The Katritzky LSER model was applied to correlate distribution coefficients and separation factors in these ternary systems. |
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