Liquid-liquid equilibria study of the (water plus phosphoric acid plus hexyl or cyclohexyl acetate) systems at T = (298.15, 308.15, and 318.15) K: Measurement and thermodynamic modelling

被引：33

作者：

Gilani, A. Ghanadzadeh ^{[1
]}

Gilani, H. Ghanadzadeh ^{[2
]}

Shekarsaraee, S. ^{[1
]}

Nasiri-Touli, E. ^{[1
]}

Saadat, S. L. Seyed ^{[1
]}

机构：

[1] Univ Guilan, Dept Chem, Fac Sci, Rasht 41335, Iran

[2] Univ Guilan, Dept Chem Engn, Rasht 41335, Iran

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2016年 / 98卷

关键词：

Liquid-liquid equilibrium; Phosphoric acid; NRTL model; UNIQUAC model; LSER approach; SOLVATION ENERGY RELATIONSHIPS; PHASE-EQUILIBRIA; SOLVENT-EXTRACTION; AQUEOUS-SOLUTIONS; TERNARY-SYSTEMS; CYCLIC SOLVENT; BUTYRIC-ACID; PURIFICATION; ETHER; METHANOL;

D O I：

10.1016/j.jct.2016.03.025

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Liquid-liquid equilibrium (LLE) data for the (water + phosphoric acid + n-hexyl acetate or cyclohexyl acetate) ternary systems were determined at T = (298.15, 308.15 and 318.15) K and p = 101.3 kPa. The cloud point method was used to obtain the solubility and the Karl-Fischer, acidimetric titration, and refractive index methods were used to determine the tie-line values. Both the ternary systems exhibit type-1 behavior of LLE. The experimental values were regressed and acceptably correlated using the UNIQUAC and NRTL models. The reliability of the experimental tie lines was confirmed using the Othmer-Tobias plot. Experimental distribution coefficients and separation factors were fitted using the Kamlet-Taft LSER model. The influence of temperature on the biphasic area and separation factor was found to be minor. As a result, both the esters are suitable separating agents for aqueous phosphoric acid mixtures. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：200 / 207

页数：8

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