Mahsa Gholaminezhad, Ali Ghanadzadeh Gilani* and Neda Gilani*,
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Evaluation of Liquid–Liquid Equilibria for Aqueous Mixtures of Propionic Acid with Two Cyclic and Aryl Ketones: Measurement and Thermodynamic Modeling
Experimental liquid–liquid equilibrium (LLE) data were determined for the ternary aqueous mixtures of propionic acid with the two cyclic and aryl ketones (isophorone or acetophenone) at 298.2 and 308.2 K and 101 kPa. A type-1 LLE behavior was observed for the studied ternary systems. The local composition models of NRTL and UNIQUAC were applied to correlate the measured tie-line data, and the model binary interaction parameters were determined. The reliability of the NRTL parameters was confirmed using topological analysis related to the Gibbs tangent principle. The extraction capacity of the tested solvents was evaluated by the obtained solute distribution coefficients and selectivities. As a result, the effect of the solvent and temperature on the biphasic area was observed to be small. Accordingly, the selected ketones contain fairly high selectivities and seem to be proper extraction solvents for aqueous propionic acid.
期刊介绍：
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.
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