Isothermal vapour–liquid equilibrium with chemical reaction in the quaternary water + methanol + acetic acid + methyl acetate system, and in five binary subsystems

• Published in: Fluid phase equilibria Vol. 247; no. 1; pp. 96 - 101
• Main Authors: Bernatová, Svatoslava, Aim, Karel, Wichterle, Ivan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-01-2006; Elsevier Science
• Subjects: Acetic acid; Chemical reaction; Chemistry; Esterification; Exact sciences and technology; General and physical chemistry; Liquid-vapor equilibria; Methanol; Phase equilibria; Phase equilibrium; Chemical reaction; Acetic acid; Phase equilibrium; Esterification; Methanol; Water; Isothermal condition; Alcohol; Quaternary system; Reactive system; Thermodynamic model; Subsystem; Liquid vapor equilibrium; Methyl acetate
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2006.06.005

Vapour–liquid equilibrium (VLE) accompanied with chemical reaction in the quaternary water
+
methanol
+
acetic acid
+
methyl acetate system was measured in a modified Dvorak and Boublík still; 20 experimental points at 323.15
K were determined. For the complete and consistent description, the isothermal VLE data in the four non-reacting binary subsystems were measured at the same temperature. The data were correlated by means of the maximum likelihood procedure by using the NRTL model; binary model parameters for the binary subsystems were obtained from experimental vapour–liquid equilibrium data by using either the Hayden–O’Connell or Marek–Standart correction as appropriate, to account for the non-ideality of vapour phase. NRTL parameters for the reacting binary subsystems were estimated from the global optimization based on the quaternary experimental data. The results obtained from the correlation show a good agreement of calculated and experimental data. By using transformed composition variables, two-dimensional phase diagrams for the quaternary system have been constructed.