Liquid−Liquid Equilibria for Mixtures of (Furfural + an Aromatic Hydrocarbon + an Alkane) at T = 298.15 K (original) (raw)
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The Journal of Chemical Thermodynamics, 2004
The activity coefficients at infinite dilution for some alkanes, cycloalkanes, alkenes, alkynes and benzene in furfural have been determined by g.l.c. at T ¼ 278:15 K and T ¼ 298:15 K. The volatility of the solvent furfural, although low, was taken into account. The method used is an alternative to the pre-saturation method. The results have been used to predict the potential for furfural as a solvent in separating aromatic compounds from aliphatic compounds and other hydrocarbons using extractive distillation. The excess enthalpies of mixing at infinite dilution have also been calculated.
Industrial & Engineering Chemistry Research, 2005
In the lubricating oil manufacturing process, the aromatic content of these products is reduced by solvent extraction. In this work, a thermodynamic model is developed to simulate the properties of these mixtures when liquid-liquid equilibrium (LLE) is established with a suitable solvent. The mixtures involved in the extraction process (feed, raffinates, and extracts) are considered to be a mixture of three types of components: saturates (S), aromatics (A), and polars (P). Pseudo-components were characterized by two properties: the average boiling point obtained from the distillation curve and the specific gravity. LLE was described by means of the nonrandom two-liquid (NRTL) model with temperature-dependent interaction parameters. The use of only three pseudo-components leads to a reduced number of interaction parameters to be determined by correlation of the available experimental equilibrium data. Calculated and experimental compositions and yields of the raffinates and extracts were compared, and good agreement was obtained.
Industrial & Engineering Chemistry Research, 2009
The use of 2,2,4-tri methyl pentane as a cosolvent for extraction of aromatic hydrocarbons from lube cut is studied. Optimized values of extraction temperature and amount of 2,2,4-tri methyl pentane are determined. The liquid-liquid equilibrium between {lube oil + furfural + cosolvent} is examined with the NRTL equation. The binary interaction parameters for the NRTL model are obtained by minimization of an objective function. General binary interaction parameters are computed and reported for estimating the liquid-liquid equilibrium products between 323.15 and 343.15 K. Also, a generalized model is presented for calculation of the refractive index and specific gravity of lube-oil fractions. The calculated results are in good agreement with the results of the experiments.
Journal of Chemical & Engineering Data, 2018
2,5-Furandicarboxylic acid (FDCA) serves as a monomer in various polyesters and is often obtained through the oxidation of 5hydroxymethylfurfural. The solubility data of FDCA are of great value for the reaction process analysis and separation technology. The experimental solubility of FDCA in eight pure solvents (water, methanol, acetonitrile, acetic acid, ethyl acetate, methyl isobutyl ketone (MIBK), 1butanol, and isobutanol) and two binary solvent systems (water + acetonitrile and water + acetic acid) in the temperature range of 313.15− 363.15 K was determined. In pure solvents and binary mixtures, the solubility of FDCA increased with the increasing temperature. The order from largest to smallest solubility in pure solvents was as follows: methanol, 1-butanol, isobutanol, acetic acid, water, MIBK, ethyl acetate, and acetonitrile. The mole fraction of FDCA in binary mixtures increased first and then decreased with the increasing mole fraction of water. The solubility data were correlated with the UNIQUAC model, NRTL model, and WILSON model.
Vapor-liquid equilibriums. Systems p-xylene-furfural and ethylbenzene-furfural
Journal of Chemical & Engineering Data, 1970
Vapor-liquid equilibrium data are reported for the binary systems ethylbenzenefurfural and p-xylene-furfural at 723 mm of Hg pressure. Both the systems formed minimum boiling azeotropes. The activity coefficients were calculated, taking into consideration the vapor phase nonideality, tested for thermodynamic consistency, and correlated by Wilson's equation.
Studia Universitatis Babeș-Bolyai Chemia, 2019
In this work, excess properties (e.g. excess molar volume (V E), excess viscosity (Ƞ E), excess Gibbs free energy of activation of viscos flow (∆G* E) and molar refraction changes (∆nD) of binary solvent mixtures of tetrahydrofurfuryl alcohol (THFA) with aromatic hydrocarbons (benzene, toluene and p-xylene) have been calculated. This was achieved by determining the physical properties including density ρ, viscosity Ƞ and refraction index nD of liquid mixtures at 298.15K. Results of the excess parameters and deviation functions for the binary solvent mixtures at 298.15 K have been discussed by molecular interactions that occur in these mixtures. Generally, parameters showed negative values and have been found to fit well to Redlich-Kister equation which has been used to obtain the coefficients and evaluate the standard error.
Journal of Chemical & Engineering Data, 2001
This research has been focused on a study of sulfolane and four ionic liquids as solvents in liquid-liquid extraction. Liquid-liquid equilibria data were obtained for mixtures of (sulfolane or 4-methyl-N-butylpyridinium tetrafluoroborate ([mebupy]BF 4 ) or 1-ethyl-3-methylimidazolium ethylsulfate ([emim]C 2 H 5 SO 4 ) or 1,3-dimethylimidazolium methylsulfate ([mmim]CH 3 SO 4 ) or 1-butyl-3-methylimidazolium methylsulfate ([bmim]CH 3 SO 4 )) + toluene + n-heptane at T = 313.2 and 348.2 K and p = 0.1 MPa.