J. Chem. Eng. Data 2004, 49, 465-467
465
Isobaric Vapor-Liquid Equilibria of the Ternary System Toluene + Ethylbenzene + Amyl Acetate Helle Kirss, Mati Kuus, and Enn Siimer* Department of Material Science, Tallinn Technical University, Ehitajate tee 5, 19086 Tallinn, Estonia
Isobaric vapor-liquid equilibria (VLE) was measured for the ternary system toluene + ethylbenzene + amyl acetate. Boiling temperature (T) - liquid composition (x) relations were obtained at (26.66, 53.33, and 79.99) kPa by using a semimicroebulliometer. The Wilson model was used to correlate the binary T-x data and to predict VLE in the ternary system.
Introduction A knowledge of multicomponent vapor-liquid equilibrium (VLE) data is important in the design of equipment for separation processes. In addition, such experimental information can be used to test and develop models for correlation and prediction thermodynamic properties of mixtures. In previous work, we have reported VLE in the ternary systems o-xylene + amyl acetate + nonane,1 o-xylene + nonane + cyclohexanol,2 hexan-2-one + o-xylene + nonane,3 toluene + p-xylene + 1,2-dichloroethane,4 and toluene + ethylbenzene + chlorobenzene.5 To obtain further information regarding thermodynamic properties of ternary mixtures containing aromatic compounds, we present here VLE at pressures (26.66, 53.33, and 79.99) kPa for the system toluene + ethylbenzene + amyl acetate and two constituent binaries containing amyl acetate. We have not found information for VLE of this ternary system in the literature. Recently, we have published binary VLE data for the binary system toluene + ethylbenzene5 and compared these data with those of Wohland and Pape,6 Kutsarov et al.,7 Makh and Azarova,8 and Martirosyan et al.9 at 101.32 kPa, finding a good agreement between our experiments and literature data. For the binary toluene + amyl acetate, the boiling temperatures are measured at 101.32 kPa by Fahmy and El-Ghannam.10,11 No data are available for the system ethylbenzene + amyl acetate. For the correlation of binary VLE data and prediction ternary VLE, the Wilson equation was used as a model giving in many cases the most reliable results.
Table 1. Isobaric Vapor-Liquid Equilibrium Data: Liquid Phase Mole Fraction (x1) and Boiling Temperatures (T) in Binary Systems T/K at P/kPa x1
P ) 26.66
P ) 53.33
P ) 79.99
0.000 0.219 0.292 0.350 0.411 0.491 0.699 0.859 1.000
Toluene (1) + Amyl Acetate (2) 380.05 400.72 369.47 390.07 366.18 387.15 363.16 384.33 360.77 381.58 357.67 378.28 350.58 370.96 346.02 366.14 342.65 362.63
414.20 404.15 400.83 398.04 395.21 391.86 384.25 379.31 375.66
0.000 0.251 0.346 0.496 0.668 0.792 0.902 1.000
Ethylbenzene (1) + Amyl Acetate (2) 380.05 400.72 376.09 396.93 374.69 395.57 372.35 393.34 370.02 391.05 368.39 389.45 367.03 388.16 365.86 386.94
414.20 410.43 409.28 407.03 404.83 403.22 401.90 400.70
boiling temperature measurements were estimated to be
