Experimental Vapor–Liquid Equilibria Data of Methyl Acetate or Ethyl Acetate with 2-Butanol at 0.3 MPa and 0.6 MPa. Quality Assessment and Predictions

Abstract

Isobaric vapor−liquid equilibria for the binary system methyl acetate + 2-butanol at 0.3 MPa and 0.6 MPa and ethyl acetate + 2-butanol at 0.3 MPa and 0.6 MPa have been determined. Thermodynamic consistency was checked. The Redlich−Kister and Herington area tests were employed. The Point test, Area test and Infinite dilution test (PAI) of Kojima et al. and the point-to-point test of Van Ness et al. were also applied. The different criteria for validation were considered, and all systems showed an acceptable quality. The results of global and individual deviations on experimental data calculated by using the Fredenslund et al. routine are shown. The different versions of the unique functional group activity coefficient (UNIFAC) and analytical solution of groups (ASOG) predictive group contribution models were applied. The experimental data were also correlated with the Peng−Robinson equation applying quadratic mixing rules.

Measurement and Modeling of High Pressure Vapor–Liquid Equilibrium for Methyl Acetate or Ethyl Acetate with 2-Butanol. Isobaric Data at 1.5 MPa

“…The data obtained in this work was verified with bibliographic data, − , and for this purpose, all data were correlated to a polynomial equation presented in a previous work . The results of experimental data and the fitting of curves are shown in Figures and .…”

“…In this work all the systems satisfy the global criterion because MAD­( y 1 ) was 0.009 and 0.008 in the systems MA2B and EA2B, respectively. The bibliographic properties and the Antoine equation constants of this work and previous papers , were taken for the point-to-point test and for activity coefficient calculations. In addition, data were verified with the direct area test of Van Ness by considering the excess Gibbs free energy ( G E / RT ) residuals using the root mean squares (RMS) parameter: The results obtained for RMS were 0.135 for MA2B and 0.060 for EA2P.…”

“…4,5 A calibration curve of mole fraction (x i ) versus density (ρ ij ) had been previously obtained at 298.15 K using the densimetric technique. 10 The composition−density pairs were verified by the adequate correlation of the excess volumes and by correspondence with bibliographic data. 6−9 The greatest uncertainty found in these systems by this composition analysis method was estimated to be lower than 0.002 units in mole fraction of vapor phase.…”

“…The properties of the chemicals utilized in this paper (Table 1): normal boiling point (T bp ), density (ρ ii ), and refractive index (n D ) determined at 298.15 K, did not differ from the previous papers. 4,5,10 Further treatment of purification was not employed for these substances.…”

“…The system MA2B has been studied under isobaric conditions at 74.66 and 127.99 kPa . VLE data for MA2B at 101.32 kPa have been also informed. , The EA2B system has been only reported in the literature at 101.32 kPa and isotermically at 350 K. Both systems have recently been reported at 0.3 and 0.6 MPa.…”