je6b00040_si_001.pdf (133.46 kB)
Vapor–Liquid Equilibria for Ternary Mixtures of Isopropyl Alcohol, Isopropyl Acetate, and DMSO at 101.3 kPa
journal contribution
posted on 2016-08-05, 12:07 authored by Hui Ding, Yujie Gao, Jiaqi Li, Jinlong Qi, Hang Zhou, Shejiang Liu, Xu HanThe
vapor–liquid equilibrium (VLE) data for the binary system
isopropyl alcohol + dimethyl sulfoxide (DMSO), isopropyl acetate +
DMSO, and ternary system isopropyl alcohol + isopropyl acetate + DMSO
were measured with a VLE modified Othmer still at 101.3 kPa. The experimental
data were proved to be thermodynamically consistent when the point-to-point
consistency test of Van Ness test was applied. The binary experimental
data were correlated with the nonrandom two-liquid (NRTL), Wilson,
and universal quasichemical (UNIQUAC) activity coefficient models.
Then, the ternary VLE data were predicted with the obtained binary
interaction parameters. The results indicate that the values of equilibrium
temperature and vapor mole fraction calculated by the NRTL, Wilson,
and UNIQUAC models are in good agreement with the experimental data.
When the mole ratio of the binary azeotrope to DMSO was 1:1.5, the
binary azeotrope of isopropyl alcohol and isopropyl acetate was eliminated.
Therefore, DMSO is a potential extractive agent to separate the azeotrope
by extractive distillation.