Isothermal Vapor−Liquid Equilibria and Excess Enthalpies of (Propyl Ethanoate + Heptane), (Propyl Ethanoate + Cyclohexane), and (Propyl Ethanoate + 1-Hexene)

Abstract

The vapor pressures of (propyl ethanoate + heptane), (propyl ethanoate + cyclohexane), and (propyl ethanoate + 1-hexene) and of all the pure components were measured by means of a static device at temperatures between (263 and 363) K. The data were correlated with the Antoine equation. From these data, excess Gibbs functions were calculated for several constant temperatures and fitted to a fourth-order Redlich-Kister equation. All the systems show positive deviations from ideality. Additionally, molar excess enthalpies for the three binary systems of propyl ethanoate with heptane, cyclohexane, and 1-hexene at a temperaure of 298.15 K have been carried out using a C80 II (Setaram) calorimeter. The excess properties were compared with the results using the available "ester" main group of the group contribution method Modified UNIFAC (Dortmund), which is a well-known model for the prediction of phase equilibria and excess properties.

Isothermal (vapor+liquid) equilibria and excess enthalpy data of {1-hexene+methyl butyl ether (MBE)} and {1-hexene+methyl tert-butyl ether (MTBE)} binary systems at several temperatures

“…For pure 1-hexene, our vapor pressure data agree to within 0.7% with those reported in the literature [7,[12][13][14][15][16][17][18][19][20][21][22][23][24] in the temperature range (289 to 324) K. As shown in figure 1, for pure MBE our vapor pressure data agree to within $3% with those reported in the liter- Values of the vapor pressure P, standard deviations dP/P (%), activity coefficients c 1 and c 2 and excess molar Gibbs functions G E for the binary system {1-Hexene (1) + MBE (2)}. Values of the vapor pressure P, standard deviations dP/P (%), activity coefficients c 1 and c 2 and excess molar Gibbs functions G E for the binary system {1-Hexene…”

A new development of equation of state for square-well chain-like molecules with variable width 1.1≤λ≤3

“…Fig. 16 shows the isothermal VLE of n-propyl acetate(1) + cycolohexane(2) at 323.15, 343.15 and 363.15 K. With a temperature-independent parameter Ä 12 = 0.0409, good agreement with experiment [84] is also obtained.…”

Multiproperty Correlation of Experimental Data of the Binaries Propyl Ethanoate + Alkanes (Pentane to Decane). New Experimental Information for Vapor–Liquid Equilibrium and Mixing Properties

“…There is even an adequate representation of the irregular form (ω-shaped) of the c p E data (Figure 6f). The experimental results generated 13 for the VLE iso-T were introduced in the database used for the correlation process, together with the data of (x 1 ,v E ) presented in Table 3. Figure 6g shows an acceptable representation of the volumes at different temperatures, being the slope (∂v E /∂T) p < 0.07·10 −9 m 3 ·mol −1 ·K −1 , very similar to that derived from the experimental values, as shown in the inset Figure 6g.…”

“…Other investigators have also worked with these systems, and there are considerable v E data published at 298.15 K, − but only one study exists concerning the effect of temperature on this property. h E values for mixtures with n = 6, 7, and 8 in the set represented by H 3 CCOOC 3 H 7 (1) + C n H 2 n +2 (2) have also been published. − However, the bibliographic information on VLE is very limited, since only data for isothermic VLE have been found for the binary system with n = 7 measured at 11 temperatures in the interval 273 K to 363 K. Values of g E by chromatography have even been published at 298.15 K, for the binaries of the same ester with saturated hydrocarbons of n = 6 and 7. Finally, values of c p E9 are presented for systems with n = 7 and 10.…”