Liquid-Liquid Equilibrium of the Ternary System Water/Formic Acid/1-Pentanol at T= 308.2 K

Liquid-Liquid Equilibrium of the Ternary System Water/Formic Acid/1-Pentanol at T= 308.2 K

Hossein Ghanadzadeh (University of Guilan, Rasht, Iran), Shahin Asan (University of Urmia, Urmia, Iran) and Milad Sangashekan (University of Guilan, Rasht, Iran)
DOI: 10.4018/ijcce.2013070106
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Abstract

Liquid–liquid equilibrium data for the (water + Formic acid + 1-pentanol) ternary system were determined at T = (308.2) K in ambient pressure. This ternary system exhibits type-1 behavior of LLE. Distribution coefficients and separation factors were measured to evaluate the extracting capacity of the solvent. The consistency of the experimental tie-line data was determined through the Othmer–Tobias and Bachman equations. The raw experimental data were correlated using the NRTL and UNIQUAC models. The average root-mean-square deviation between the experimental and calculated mass fractions was 0.488% and 0.465%.
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Experimental

Material

The supplier, purity, and some properties for the organic chemicals used in this study are listed in Table 1. The organic chemicals were dried over molecular sieves (Merck 4Ǻ). Distilled and deionized water was used throughout all experiments. All materials were used as received without any further purification.

Table 1.
Supplier, purity and the measured and literature physical properties of the materials at T = 293.2K (D.R. Lide (Ed.),2010 (1), D.R. Lide (Ed.), 2009 (2))
componentMolar mass (g /mol)SupplierMass fraction puritynD/(Kgm-3)
Exp.Lit.Exp.Lit.
Formic acid46.026Merck> 0.991.37121.3714{1)12181220(1)
1-Pentanol88.148Merck> 0.991.411.4101(1)813.98814.4(1)
Water18.0151.3311.3330(2)997.99998.2(2)

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