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    Liquid phase equilibria of the system (water plus phosphoric acid+1-octanol) at T=(298.2, 308.2, and 318.2)K
    (Elsevier Science Bv, 2012) Gilani, H. Ghanadzadeh; Gilani, A. Ghanadzadeh; Shekarsaraee, S.; Uslu, H.
    Experimental solubility and tie-line data for the ternary system of (water + phosphoric acid + 1-octanol) were measured at T=(298.2. 308.2, and 318.2)K and atmospheric pressure. Data for the binodal curves were determined by cloud-point titration method. The concentration of each phase was determined by acidimetric titration, the Karl-Fischer technique, and refractive index measurements. A type-1 LLE phase diagram was obtained for this ternary system. 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 effect of temperature on the biphasic region of the ternary system and separation factor was found to be small at the temperatures studied. The Katritzky LSER model was applied to correlate distribution coefficients and separation factors in this ternary system. (C) 2011 Elsevier B.V. All rights reserved.
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    (Liquid plus liquid) equilibrium data of (water plus phosphoric acid plus solvents) systems at T = (308.2 and 318.2) K
    (Academic Press Ltd- Elsevier Science Ltd, 2012) Gilani, H. Ghanadzadeh; Gilani, A. Ghanadzadeh; Shekarsaraee, S.; Uslu, H.
    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. (C) 2012 Elsevier Ltd. All rights reserved.
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    Liquid-liquid equilibria of (water plus butyric acid plus diethyl succinate or diethyl glutarate or diethyl adipate) ternary systems
    (Elsevier Science Bv, 2011) Gok, Asli; Kirbaslar, S. Ismail; Uslu, Hasan; Gilani, H. Ghanadzadeh
    Liquid-liquid equilibrium (LLE) data of the solubility (binodal) curves and tie-line end compositions were examined for mixtures of [(water (1)+ butyric acid (2) + diethyl succinate or diethyl glutarate or diethyl adipate (3)1 at 298.2 K and 101.3 +/- 0.7 kPa. The relative mutual solubility of butyric acid is higher in the diethyl succinate or diethyl glutarate or diethyl adipate layers than water layers. The consistency of the experimental tie-lines was determined through the Othmer-Tobias correlation equation. The LLE data were correlated with NRTL model, indicating the reliability of the NRTL equations for these ternary systems. The best results were achieved with the NRTL equation, using non-randomness parameter (alpha = 0.3) for the correlation. Distribution coefficients and separation factors were measured to evaluate the extracting capability of the solvents. (C) 2011 Elsevier B.V. All rights reserved.