Liquid−Liquid Equilibria for Cyclohexane + Ethylbenzene + Sulfolane at (303.15, 313.15, and 323.15) K

Abstract

Liquid-liquid equilibrium for cyclohexane + ethylbenzene + sulfolane have been measured at the temperatures (303.15, 313.15, and 323.15) K and at atmospheric pressure. The reliability of the experimental data was tested using the Othmer-Tobias correlation. The liquid-liquid equilibrium (LLE) data were then analyzed using a UNIFAC model with group interaction parameters extracted from the LLE data bank (UNIF-LL) and a NRTL version with temperature-dependent binary parameters determined from the experimental LLE data (NRTL/2); both as programmed by the Aspen Plus simulator. On the basis of the analysis of these data, both models represented the experimental data with sufficient accuracy as revealed from the very small values of the root-mean-square error (RMSE) and the average absolute deviation (AAD) in composition.

Comparison of Ionic Liquids to Conventional Organic Solvents for Extraction of Aromatics from Aliphatics

“…The main solvents reported in the literature for aliphatic–aromatic liquid–liquid extraction, which have also been used in industrial separations, are sulfolane − and glycols, ,,− but many compounds have been tested for application in aliphatic–aromatic separations, including dimethyl sulfoxide, , ethylene and propylene carbonate, ,,− N -methylpyrrolidone, − N -formylmorpholine, ,,− and dimethylformamide, among others. The ternary aliphatic + aromatic + solvent systems, with compositional analysis, distribution factors, and selectivities, are detailed in each study, which is useful for performance comparisons among different compound combinations.…”

Quaternary and Quinary Liquid–Liquid Equilibria for Systems of Ethanol + Butanol + Octane + Nonane + Water at 298.15 K under Atmospheric Pressure

“…The root-mean-square error (RMSE) and the average absolute deviation (AAD) in mass fraction obtained using the NRTL model at 298.15 K of the two quaternary systems are shown in Table . The RMSE and AAD are defined as follows: where N is the number of data points and w i is the mass fraction of component i.…”

(Liquid+liquid) equilibria for ternary mixtures of (water+propionic acid+organic solvent) at T=303.2K

“…In this mixture the correlated results were in good agreement with the observed results. As a continuation of that previous work, we present the LLE data for the ternary system {water + propionic acid + organic solvents (cyclohexane, toluene, and methylcyclohexane)} at 303.2 K. These solvents have already been used as extractants to determination of LLE data for many ternary mixtures individually [9][10][11][12][13][14][15].…”