Abstract: Vapor-Liquid Equilibrium（VLE）data is an important foundation for the chemical data, Isobaric vapor-liquid equilibrium (VLE) data for acetic acid+ extraction of A system was measured at 101.33kPa and 13.33kPa by using an improved Rose still. Themodynamic consistency for the experimental data was examined by using point by point test, and the fugacity coefficients of components in the vapor phase were calculated by Hayden-O’connell method. Finally, use MATLAB toolbox function back to return the Van Laar, Wilson and NRTL model parameters and correlation deviation. For NRTL model, the average absolute deviation in vapor-phase is 0.0027, and the average absolute deviation of the equilibrium temperature is 0.2583℃.
Key words: acetic acid; MATLAB; vapor-liquid equilibrium
