Vapor-liquid equilibrium for binary and ternary systems of tetrahydrofuran, ethyl acetate and N-methyl pyrrolidone at pressure 101.3 kPa

Vapor−liquid equilibrium (VLE) data for the binary systems of tetrahydrofuran (THF) + ethyl acetate (EtOAc), THF + N-methyl pyrrolidone (NMP) and EtOAc + NMP, and the ternary systems of THF + EtOAc + NMP were measured at 101.3 kPa. The modified Rose vapor recirculating type equilibrium still was utilized to obtain the experimental data. The Herington method, as well as the Van Ness test, was used to verify the thermodynamic consistency of the experimental data. The NRTL model, UNIQUAC model and Wilson model were adopted to correlate the vapor-liquid equilibrium data. Accordingly, the binary interaction parameter for each model was obtained by regressing the experimental data. The results show that the three models can accurately agreement with the experimental data.