Vapour–liquid and chemical equilibria in the ethyl ethanoate + ethanol + propyl ethanoate + propanol system accompanied with transesterification reaction

Phase and chemical equilibria in the quaternary ethyl ethanoate + ethanol + propyl ethanoate + propanol system and in all six binary subsystems have been investigated at two isotherms, namely at 323.15 and 348.15 K. In total, 116 quaternary experimental points were determined. The binary data were correlated by means of the NRTL model using a robust approach and the maximum likelihood procedure. The binary parameters obtained were used for prediction of vapour–liquid equilibria in the quaternary system and results show a good agreement of calculated and experimental data. The three-dimensional phase diagrams for the quaternary system have been constructed with use of transformed compositions.

► We have measured new experimental data on vapour–liquid equilibria in systems with reacting components.
► Six binary and one quaternary systems consisting of ethanol, propanol, ethyl and propyl ethanoate were investigated.
► Correlation of data with use of the NRTL equation.
► Prediction of phase equilibria in quaternary transesterification system is based on binary data.