Study of the LLE, VLE, and VLLE of the Ternary System Water + 1-Butanol + Isoamyl Alcohol at 101.3 kPa

Abstract

The liquid–liquid equilibrium of the water + 1-butanol + isoamyl alcohol system at 303.15 and 313.15 K has been determined experimentally. The UNIQUAC, NRTL, and UNIFAC models have been employed to correlate and predict liquid–liquid equilibria (LLE) and compare them with the experimental data. Additionally, the vapor–liquid and vapor–liquid–liquid equilibria (VLE and VLLE, respectively) of this system have been determined using a modified Fischer LABODEST still. The data obtained have been used to correlate and obtain the binary interaction parameters for UNIQUAC and NRTL. The validity of the models to reproduce the VLE and VLLE data has been analyzed.