Isobaric Vapor–Liquid Equilibria of Binary Mixtures of Diethyl Carbonate with Methyl Acetate, n-Propyl Acetate, or Amyl Acetate at 100.17 kPa

Abstract

Carbonate esters and esters are widely used in the pharmaceutical industry. It is important to enrich the vapor−liquid equilibrium (VLE) database of these components. In this article, the isobaric VLE data of three binary mixtures diethyl carbonate (DEC) + methyl acetate, DEC + n-propyl acetate, and DEC + amyl acetate at 100.17 kPa were obtained. The experimental data were tested using the Van Ness consistency test, which indicated that the experimental data satisfy the test for thermodynamic consistency. The activity coefficient models Wilson, NRTL, and UNIQUAC were used to correlate the experimental VLE values to obtain the interaction parameters. The results associated with the three models are in good agreement with the experimental data. The minimum average absolute deviation values of vapor-phase compositions and temperatures for all are 0.0010 and 0.15 K, and no azeotropic behavior was observed in these systems. In addition, the group contribution method was used to fit the group parameters of the vapor−liquid equilibrium data.

Binary Isobaric Vapor–Liquid Equilibrium for the System of 1-Phenylethanol + Ethyl Butyrate + Ethanol +1-Phenylethyl Butyrate at 101.3 kPa

“…The experimental pressures were not more than 101.3 kPa, at which the vapor phase was regarded as an ideal gas, as reported in the literature . Therefore, the vapor–liquid equilibrium relationship could expressed as where p is the total pressure of the VLE system, γ i is the activity coefficient of component i , and x i and y i are liquid phase and gas phase mole fractions of component i . p i s was calculated by the Antoine equation with the Antoine constants in Table .…”

Isobaric Vapor–Liquid Equilibria of Binary Mixtures of Diethyl Carbonate with Isopropyl Acetate, sec-Butyl Acetate, or Isoamyl Acetate at 101.3 kPa

“…The structure diagram of the modified Rose–Williams still is shown in Figure . Meanwhile, the modified Rose–Williams still had been verified in previous work . The VLE data determined by the modified Rose–Williams still is reliable.…”

“…Meanwhile, the modified Rose−Williams still had been verified in previous work. 21 The VLE data determined by the modified Rose−Williams still is reliable. In addition, the vapor or liquid phase samples were determined at least three times in each experiment to reduce the error.…”

“…According to literature research, ,− the VLE data for the binary systems of DEC with isopropyl acetate, sec -butyl acetate, or isoamyl acetate have not been reported, and they were important and very worth determining for the carbonate esters or esters industrial systems. Thus, the isobaric VLE data for binary systems isopropyl acetate + DEC, sec -butyl acetate + DEC, and DEC + isoamyl acetate were measured at 101.3 kPa in our work.…”

Vapor Liquid Equilibrium for the Binary of 1-Methoxy-2-propanol + 1,2-Propanediol and 2-Methoxy-1-propanol + 1,2-Propanediol at 101.3 kPa and 50.0 kPa

“…Afterward some vapor and liquid samples were taken out for analysis. On the basis of the results of previous experiments, − it is confident that our experimental apparatus and operating procedures are reliable.…”