Isobaric Vapor–Liquid Equilibrium of Ethyl Acetate + 1-Hexanol, Methanol + 1-Hexanol, and n-Heptane + Cyclohexanol Binary System at 101.3 kPa

The fundamental component of the data used in chemical calculations is vapor–liquid equilibrium (VLE) information. The VLE data between several routinely used extractants and chemicals often utilized in industry still have some gaps, nevertheless. The isobaric phase equilibrium values of ethyl acetate + 1-hexanol, methanol + 1-hexanol, and n-heptane + cyclohexanol at 101.3 kPa were measured by using a modified Rose VLE still. The accuracy of experimental data was verified using two test techniques, the Van Ness and Fredenslund tests, and the final experimental data were highly correlated. The NRTL model, UNIQUAC model, and WILSON model were used to correlate the data, and binary interaction parameters between the components were derived. The three systems all meet the data requirements with respect to the root-mean-square deviation (RMSD) and average absolute deviation (AAD) of temperature being less than 0.1 and the RMSD and AAD of the vapor phase mole fraction being less than 0.01. The experimental and predicted values of all data points are in good agreement, and they all meet the requirements outlined in the process design. Additionally, it is discovered that the system under study behaves optimally throughout the whole research domain.