Liquid−Liquid Equilibria for the Quaternary System Water + Methyl tert-Butyl Ether + Benzene + Cyclohexane and Its Constituent Partially Miscible Ternary Systems at 303.15 K

Abstract

Tie-line data for the water, methyl tert-butyl ether, and cyclohexane [w 1H2O + w 2C5H12O + (1 − w 1 − w2)C6H12] and water, methyl tert-butyl ether, and benzene [w 1H2O + w 2C5H12O + (1 − w 1 − w 2)C6H6] ternary systems (where w is the mass fraction) were investigated at a temperature of T = 303.15 K. A quaternary system containing these four compounds [w 1H2O + w 2C5H12O + w 3C6H6 + (1 − w 1 − w 2 − w 3)C6H12] was also studied at the same temperature. Data for the other partially miscible ternary system [w 1H2O + w 3C6H6 + (1 − w 1 − w 3)C6H12] were taken from the literature, whereas the fourth ternary system [w 2C5H12O + w 3C6H6 + (1 − w 2 − w 3)C6H12] was completely miscible. The mutual hydrocarbon−water solubility with the addition of methyl tert-butyl ether was investigated. The equilibrium data of the three ternary systems (including that taken from the literature) were used to determine interaction parameters for the UNIQUAC and NRTL equations. The UNIQUAC parameters were then averaged to predict equilibrium data for the quaternary system using this model. The liquid−liquid equilibrium (LLE) were also predicted with the UNIFAC group contribution method. The UNIQUAC equation seems to be more accurate than the other methods both for the ternary systems and the quaternary system, as can be observed from the values of both residuals. However, its predicted distribution coefficients have high deviation percentages. On the other hand, the solubility curves are well-correlated by the UNIQUAC and NRTL equations for these ternary systems.

Liquid–Liquid Extraction of Benzene and Cyclohexane Using Sulfolane-Based Low Transition Temperature Mixtures as Solvents: Experiments and Simulation

“…Cyclohexane is less toxic than benzene, and it is an excellent solvent for synthetic rubber, cellulose ethers, resins, oils, asphalt, and wax. 2,3 With the rapid development of the economy, the demand for cyclohexane is increasing. There are two methods of industrial production of cyclohexane: benzene hydrogenation and fractional distillation of petroleum hydrocarbon.…”

“…Cyclohexane is an important organic chemical material which is widely used in the synthesis of cyclohexanol, cyclohexanone, adipyl, hexanediamine, Nylon-6, Nylon-66, polycaprolactam, polyamide fiber, and so on. Cyclohexane is less toxic than benzene, and it is an excellent solvent for synthetic rubber, cellulose ethers, resins, oils, asphalt, and wax. , With the rapid development of the economy, the demand for cyclohexane is increasing. There are two methods of industrial production of cyclohexane: benzene hydrogenation and fractional distillation of petroleum hydrocarbon.…”

Measurements and Thermodynamic Models for the Separation of 2-Methoxyethanol and Water Azeotropic Mixtures via Different Solvents

“…Recently, a large number of extraction solvents, such as methyl tert -butyl ether (MTBE) and ethyl acetate, have been used for separating azeotropic mixtures and treatment of wastewater in liquid–liquid extraction. ,− An objective of the present project was to study various solvents for extraction of MOE in aqueous solution, including MTBE, ethyl acetate, and trichloromethane as solvents at 313.15 K. Moreover, dichloromethane (CH 2 Cl 2 , DCM) has been considered as a solvent in dry cleaning and degreasing processes in industrial applications. , Because of the volatility and low boiling point temperature of DCM, DCM is usually used below 308.15 K. , Hence, in this research, a ternary system for water + MOE + DCM was measured at 298.15 K.…”