Liquid−Liquid Equilibrium in Ternary Systems Containing Ethylene Glycol, Monofunctional Benzene Derivative, and Ethyl Acetate

Abstract

Liquid-liquid equilibrium (LLE) data in ternary systems ethylene glycol þ toluene þ ethyl acetate, ethylene glycol þ anisole þ ethyl acetate, and ethylene glycol þ acetophenone þ ethyl acetate were measured at 298.15 K. The experimental data were utilized to adjust the parameters of the nonrandom two-liquid (NRTL) equation. The Othmer-Tobias plot of the LLE data shows that the system ethylene glycol þ acetophenone þ ethyl acetate exhibits a less common behavior.

Solvent Effects in Polyurethane Cure: A Model Study

“…In both cases, the addition of the polyol leads to an increase in the density, the polyol having a distinct effect on the formation of structure in the liquid mixture. Deviations from ideal mixing behavior have been reported for a number of esters/aromatic hydrocarbon mixtures and the data reported here are comparable to those published elsewhere. − Deviations from ideal mixing in these systems are attributed to disruption of the local structure which exists in the pure liquids and the creation of new interactions as a consequence of dipole – induced dipole interaction between the permanent dipole on the esters and the polarizable π electron structure of the aromatic rings. The deviations from ideality are greater in the case of the ethyl acetate/toluene than in n -butyl acetate/xylene mixtures.…”

Measurement and Thermodynamic Modeling of Ternary Liquid–Liquid Equilibrium for Extraction of 2,6-Xylenol from Aromatic Hydrocarbon Mixtures with Different Solvents

“…Figures – show the ternary phase diagrams for the four systems. The mutual solubilities between toluene and glycerol, ethylene glycol, and 1,4-butanediol at 303.15 K and those from the literature ,,− are displayed in Figures – . The existing deviations could be due to the differences in chemical purity, gas chromatography test conditions, and the different measurement methods.…”

“…Comparison of the mutual solubility with the reference data for the mixture toluene + ethylene glycol: (■), this work; (◇), ref ; (○), ref ; (△), ref ; (□), ref ; (▽), ref .…”