Thermodynamic Investigation of 1,3,5-Trioxane, Methyl Acrylate, Methyl Acetate, and Water Mixtures, in Terms of NRTL and UNIQUAC Models

The thermodynamics of 1,3,5-trioxane, methyl acrylate, methyl acetate, and water were systematically investigated, in terms of NRTL and UNIQUAC models. Solubility data of 1,3,5-trioxane in methyl acetate and methyl acrylate were reported. Vapor-liquid equilibria (VLE) data of 1,3,5-trioxane + methyl acetate and 1,3,5-trioxane + methyl acrylate binary systems were measured. The liquid-liquid equilibria (LLE) of 1,3,5-trioxane + methyl acrylate + water and 1,3,5-trioxane + methyl acrylate + methyl acetate + water mixtures were investigated. The thermodynamic consistency of VLE and LLE experimental data were tested by using Van Ness point method and Othmer-Tobias method, respectively. Binary interaction parameters for VLE and LLE systems were regressed and compared according to the average absolute deviation (AAD) and average absolute deviation in percentage (AAD%) values. Proper model and parameters were applied in the designed separation process of the quaternary mixture.