Liquid-liquid equilibria for the ternary system water+octane+2-butyloxy-ethanol
Journal
Fluid Phase Equilibria
Journal Volume
399
Pages
16-21
Date Issued
2015
Author(s)
Abstract
Experiment of the fish-shaped phase diagram of the ternary water. +. octane. +. 2-butyloxy-ethanol system under atmospheric pressure was performed at constant water/octane mass ratio (1/1) to determine the upper critical solution temperature (UCST. = 296.90 ± 0.05. K) and the lower critical solution temperature (LCST. = 286.10 ± 0.05. K). The liquid-liquid equilibria of the water. +. octane. +. 2-butyloxy-ethanol system at 283.15, 293.15 and 303.15. K were measured under atmospheric pressure. At 283.15 and 303.15. K, there is only one two-liquid-phase-coexisting envelop in the triangle phase diagram. At 293.15. K, in-between the UCST and LCST, the system exhibits three two-liquid-phase-coexisting envelops and one three-liquid-phase-coexisting tie triangle in the triangle phase diagram. The experimental results of liquid-liquid equilibria were further correlated with the nonrandom two-liquid (NRTL) model.
Type
journal article