Isothermal vapor–liquid equilibria for methanol and 2,3-dimethyl-2-butene at 343.15 K, 353.15 K, 363.15 K, 373.15 K

Isothermal vapor–liquid equilibrium (VLE) data were measured for the binary system methanol and 2,3-dimethyl-2-butene at 343.15 K, 353.15 K, 363.15 K, 373.15 K, respectively. The measurements were carried out in a novel recirculation equilibrium equipment. Three activity coefficient models including Wilson, NRTL and UNIQUAC, as well as the Soave–Redlich–Kwong equation of state were used to correlate the experimental data. The correlation results showed that a good consistency between the experimental data and the Wilson model can be achieved.

► Isothermal VLE data for methanol + 2,3-dimethyl-2-butene were measured at 343.15 K, 353.15 K, 363.15 K, 373.15 K. ► Parameters of Wilson, NRTL and UNIQUAC models at different temperatures were regressed. ► Wilson model gives the best correlation of the VLE data. ► The binary system shows a positive deviation from Raoult's law and has a maximum pressure azeotrope.