Liquid−Liquid Equilibria of the Ternary Systems Dodecane + Butylbenzene + Sulfolane, Dodecane + 1,4-Diisopropylbenzene + Sulfolane, and Dodecane + Octylbenzene + Sulfolane

Abstract

Liquid-liquid equilibria of the ternary systems dodecane + butylbenzene + sulfolane, dodecane + 1,4-diisopropylbenzene + sulfolane, and dodecane + octylbenzene + sulfolane have been determined at the temperatures of 323.15 K, 348.15 K, and 373.15 K. The tie line data were correlated with the wellknown NRTL and UNIQUAC models. The experimental data were filled in the UNIQUAC equation better than in the NRTL equation; the average root-mean-square deviations phase composition error was 0.3215 for UNIQUAC compared to 0.4520 for NRTL.

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.…”

Phase equilibria measurements of ternary mixtures (sulfolane+a carboxylic acid+pentane) at 303.15K

“…Kao and Lin [20] reported the LLE of (sulfolane + 1.4 diisopropyl benzene + ndecane or n-dodecane or n-tetradecane) and their conclusion was that the addition of 1.4 diisopropyl benzene to sulfolane is found to increase the solubility of alkanes in the order of n-decane > ndodecane > n-tetradecane. The relative mutual solubility of 1.4 diisopropyl benzene is higher in (n-decane + sulfolane) than in (n-dodecane + sulfolane) or (n-tertadecane + sulfolane) mixtures.…”

Phase equilibria for ternary liquid systems of (water+tetrahydrofuran+nonprotic aromatic solvent) at T=298.2K

“…The efficient separation of ring-containing compounds (e.g., cyclic ethers and cyclic alcohols) from aqueous solutions is an important concept in the chemical industry, where many solvents have been tested to improve such recovery [1][2][3][4][5][6][7][8][9]. Three major factors have been found to influence the equilibrium characteristics of solvent extraction of cyclic ethers from aqueous solutions, i.e., the nature of solute, the concentration of solute, and the type of organic solvent.…”

“…Plot of separation factor (S) against initial tetrahydrofuran mole fraction (x i ) for the ternary systems (water + tetrahydrofuran + aromatic solvent), experimental and theoretical through SERLAS, solid line equation(1).…”