LIQUID-LIQUID EQUILIBRIUM MODELING OF TERNARY HYDROCARBON PLUS WATER PLUS ALKANOL SYSTEMS

Citation
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
Citations number
37
Categorie Soggetti
Engineering, Chemical
ISSN journal
08885885
Volume
36
Issue
10
Year of publication
1997
Pages
4391 - 4396
Database
ISI
SICI code
0888-5885(1997)36:10<4391:LEMOTH>2.0.ZU;2-8
Abstract
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.