پديدآورندگان :
Ghanadzadeh Gilani A Department of Chemistry, Faculty of science, University of Guilan, Rasht, Iran , Ghanadzadeh Gilani H Department of Chemical Engineering, University of Guilan, Rasht, Iran , Shekarsaraee S Department of Chemistry, Faculty of science, University of Guilan, Rasht, Iran , Seyed Saadat S.L. Department of Chemistry, Faculty of science, University of Guilan, Rasht, Iran
كليدواژه :
Liquid–Liquid equilibria , Pentanol , Phosphoric acid , NRTL model.
چكيده فارسي :
Liquid–liquid equilibrium (LLE) data are investigated for mixtures of (water + phosphoric acid + amyl alcohol) at 298.15K and atmospheric pressure. The solubility curves and the tie-line end compositions of liquid phases at equilibrium were determined. The result show that this ternary mixture is type one liquid-liquid equilibrium system. The distribution coefficients and the selectivity factors for the immiscibility region are calculated. The reliability of the experimental tie-lines was confirmed by using Hand correlation. By modeling the above system, binary interaction parameters of the NRTL thermodynamic model was estimated. The NRTL model correlates the LLE data for T=298.15K with a root mean square deviation of 3.46 %, between the observed and calculated mole concentrations. It is concluded that amyl alcohol may serve as an adequate solvent to extract phosphoric acid from its dilute aqueous solution
