Iv. Prikhodko et al., LIQUID-LIQUID EQUILIBRIUM MODELING OF TERNARY HYDROCARBON PLUS WATER PLUS ALKANOL SYSTEMS, Industrial & engineering chemistry research, 36(10), 1997, pp. 4391-4396
The associated perturbed anisotropic chain theory (APACT) and the hole
quasilattice group-contribution model (HM) have been used to model li
quid-liquid equilibria at low pressure in ternary systems composed of
hydrocarbons (n-heptane, heptene-1, heptyne-1, benzene, toluene), wate
r, and alkanols (methanol, ethanol, n-propanol, n-butanol, n-pentanol,
n-hexanol). Calculations of phase diagrams have been carried out and
compared with experimental data. Both equations of state (EOS) tested
describe the phase diagrams reasonably well and give the correct slope
to the tie lines. However, the HM reproduces the binodal curves bette
r than does the APACT model. In most cases the EOS predict the correct
type of phase diagram. The results show that the HM is not only able
to fit the experimental data but can be recommended also to predict th
e liquid-liquid equilibria for the systems under consideration.