Cyclohexane hexafluorobenzene mixture

The results of the calculations are presented in Figures 2 and 3. For the system benzene—hexafluorobenzene, the calculations were carried out at 303.15, 313.15, 323.15, 333.15, and 343.15 K. The results for 303.15 K are given in Figures 2a and 3a, and the temperature dependence is examined later in the paper. Except the system benzene—cyclohexane, for which the KBIs were calculated previously at 303.15 all the other KBIs were calculated in this paper for the first time. There is good agreement between our calculations at 298.15 K and those calculated in the literature at 303.15 K for the benzene-cyclohexane mixture (Figure 2e). 

The second kind of binary systems contain benzene (B), hexafluorobenzene (HFB), toluene (TL), and cyclohexane (CH) HFB/B (for five different temperatures), HFB/TL, HFB/CH, B/TL, and B/CH. In contrast to the first group, these systems have small deviations from idealitybut some of them have more complex thermodynamic behaviors such as double azeotropy. The information about these mixtures is listed in Table 2. 

Results of Calculatious. The root-mean-square deviations (rmsd) of the calculated pressures with respect to the experimental ones are listed in Tables 3 and 4. The comparison of the rmsd for alcohol/water mixtures indicates that the new equations provide the best performances for 29 VLF and NRTL for 5 sets. A similar conclusion was reached for the systems containing benzene, hexafluorobenzene, toluene, and cyclohexane the new equations provide the best performances for 7 sets, and the new equations and the NRTL provide almost the same results for 2 sets. 

Excess volumes have been tabulated for mixtures of hexafluorobenzene with CeHs, PhMe, KiPri, p-CeH4Me2, l.S.S-CeHsMea, cyclohexane, cyclohexene, or cyclohexa-l,3-diene, for mixtures of pentafluorobenzene with each of the hrst six of these hydrocarbons or with PhEt, PhPr , PhBu", PhBu , PhPe , or methylcyclohexane, and for mixtures of CsFsX (X = H, F, Cl, Br, or I) with benzene or cyclohexane. ... 

MA Suhm, KJ Muller, H Weingartner. A nuclear magnetic relaxation study of the structure of binary liquid mixtures of hexafluorobenzene with benzene and cyclohexane. Z Phys Chem, Neue Folge 155 101-119, 1987. 

---