Binary Mixtures Of Diethyl Carbonate Research Articles

Densities, Viscosities and Refractive Indices for Binary Mixtures of Diethyl Carbonate with Fatty Acid Ethyl Esters

Densities, Viscosities and Refractive Indices for Binary Mixtures of Diethyl Carbonate with Fatty Acid Ethyl Esters

Isobaric Molar Heat Capacities of Binary Mixtures of Diethyl Carbonate and Methyl Caprate at High Pressures

Isobaric Molar Heat Capacities of Binary Mixtures of Diethyl Carbonate and Methyl Caprate at High Pressures

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

Carbonate esters and esters were commonly used as solvents, reaction carrier, and additives in organic synthesis, the pharmaceutical industry, and processing industries. Vapor–liquid equilibrium (V...

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

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 ...

Thermophysical behaviour of diethyl carbonate + ether binary mixtures at T = (303.15, 308.15 and 313.15) K

The density, viscosity and ultrasonic velocity have been measured for the binary mixtures of diethyl carbonate + butyl vinyl ether, +diisopropyl ether, +anisole, and +dibutyl ether at T = (303.15, 308.15 and 313.15) K. The experimental data have been used to calculate the excess molar volume VmE, deviation in viscosity Δη and the acoustical parameters namely isentropic compressibility (Ks), free volume (Vf), free length (Lf), and internal pressure (πi). The theoretical viscosities have been evaluated using Grunberg-Nissan, Lobe and Krishnan-Laddha models and the relative merits are studied in terms of the interaction parameters. The excess or deviation properties have also been evaluated and fitted to the Redlich-Kister polynomials and the results are interpreted in terms of molecular interactions present in mixtures.

Thermophysical and optical studies of molecular interactions in binary mixtures of diethyl carbonate with aromatic compounds at temperatures from 298.15 to 323.15 K

In the present investigation, experimental densities, speeds of sound and refractive indices of binary mixtures of diethyl carbonate (DEC) with three aromatic compounds of varying nature (Aniline, Benzonitrile and Benzaldehyde) have been measured over the entire composition range at different temperatures from 298.15K to 323.15K employing a vibrating-tube densimeter DSA 5000M at ambient pressure 0.1MPa. Excess molar volume, excess isentropic compressibility, excess speeds of sound and deviations in molar refraction were calculated from the density and speed of sound results. Excess properties were correlated with the Redlich–Kister polynomial equation. Values of partial excess volumes at infinite dilution for these three binary systems at different temperatures were calculated from the adjustable parameters of the Redlich–Kister smoothing equation. The excess isobaric coefficients of thermal expansion of three binary mixtures have been estimated from temperature dependence of densities. It is seen that all excess properties are negative over the entire range of composition and temperature. Strong molecular interactions are seen to exist between diethyl carbonate and aromatic compounds. The system (DEC+aniline) exhibits the maximum negative deviation from ideality among the three systems, resulting from multiple factors such as the partial interstitial accommodation effect, steric hindrance, the size of molecule and the instantaneous dipole induced dipole interactions.

Influence of alkyl group and temperature on excess thermodynamic properties of diethyl carbonate and their binary mixtures at 0.1 MPa

In this work, the experimental densities, ρ, and speeds of sound, u, of binary mixtures of diethyl carbonate (DEC) with the three isomers of xylene (ortho-, meta- and para-xylenes) were measured over the entire composition range at T=(298.15–323.15) K, and at atmospheric pressure (0.1MPa). From the experimental data, the excess molar volumes, VmE, excess isentropic compressibility, κsE, excess molar isentropic compressibility, κs,mE, and deviation in speed of sound, μD have been evaluated. Excess parameters were fitted to the Redlich–Kister polynomial equation to obtain the binary coefficients and the standard errors. Excess partial molar volumes (V¯m,1E and V¯m,2E) and their limiting values at infinite dilution (V¯m,10E and V¯m,20E) have been calculated from the experimental density measurements. Excess partial molar isentropic compressibilities, κ¯s,m,1E and κ¯s,m,2E of both components and their respective limits at infinite dilution, κ¯s,m,10E and κ¯s,m,20E, were analytically obtained using Redlich–Kister type equations.

Study of Molecular Interactions in Binary Mixtures of Diethyl Carbonate + Benzene Derivatives at Different Temperatures

Investigation on the molecular interactions between binary mixtures containing diethyl carbonate in combination with nitrobenzene, chlorobenzene and aniline is presented. Ultrasonic velocity and density values were determined for the individual components as well as binary mixtures of the above benzene derivatives with diethyl carbonate at temperatures (293.15, 298.15, 303.15, 308.15, 313.15, 318.15 and 323.15) K over the entire composition range. Further, adiabatic compressibility and acoustic impedance values were calculated using the experimental results. In addition to these parameters, the excess parameters like excess adiabatic compressibility, excess acoustic impedance and deviation in ultrasonic velocity were also obtained. Based on all these results, molecular interactions among the selected components were discussed.

Study on Thermodynamic Properties of Binary Mixtures of Diethyl Carbonate with Benzonitrile, Benzaldehyde at Different Temperatures

The speed of sound and density in binary liquid mixture of diethyl carbonate + benzonitrile, + benzaldehyde have been determined at temperatures 298.15, 308.15 and 318.15 K over the whole composition range. The data have been utilized to estimate the excess adiabatic compressibility (βE), excess intermolecular free length (LfE), excess speed of sound (uE) at the above temperatures. The excess values have been found to be useful in estimating the strength of the interactions in the liquid mixtures.

Study on Thermodynamic Properties of Binary Mixtures of Diethyl Carbonate with Benzonitrile, Benzaldehyde at Different Temperatures

The speed of sound and density in binary liquid mixture of diethyl carbonate + benzonitrile, + benzaldehyde have been determined at temperatures 298.15, 308.15 and 318.15 K over the whole composition range. The data have been utilized to estimate the excess adiabatic compressibility (βE), excess intermolecular free length (LfE), excess speed of sound (uE) at the above temperatures. The excess values have been found to be useful in estimating the strength of the interactions in the liquid mixtures.

Excess properties of diethyl carbonate + ketone binary mixtures at variable temperatures: Application of PFP theory to excess volumes

Measurements of densities ρ, viscosities η, and refractive indices nD have been carried out for binary mixtures of diethyl carbonate (DEC) with acetophenone, cyclopentanone, cyclohexanone, and 3-pentanone over the entire composition range at the temperatures (303.15, 308.15 and 313.15) K and at atmospheric pressure. From these experimental data, the excess volumes VE, deviation in viscosity Δη and deviation in molar refraction ΔR have been calculated. The Redlich–Kister polynomial equation has been used to estimate the binary fitting parameters and the standard errors. The Prigogine–Flory–Patterson (PFP) theory and its applicability in predicting VE at (303.15, 308.15 and 313.15) K has been tested. The experimental viscosities were analyzed on the basis of Lobe and Auslaender models. Further different mixing rules have been applied to predict the refractive index values of the studied mixtures.

Densities and Viscosities of Four Binary Diethyl Carbonate + 1-Alcohol Systems from (288.15 to 313.15) K

Densities and viscosities of the binary mixtures of diethyl carbonate (DEC) with ethanol, 1-propanol, 1-pentanol, and 1-octanol were measured over the entire mole fraction at (288.15, 293.15, 303.15, and 313.15) K and normal atmospheric pressure. Moreover, the excess molar enthalpies for the present binary mixtures were determined at 303.15 K. Other mixing properties such as the excess molar volumes have been also obtained for each of the systems and temperatures. The composition–viscosity data were correlated with several specific equations to evaluate their suitability for these systems.

Density and Viscosity of Binary Mixtures of Diethyl Carbonate with Alcohols at (293.15 to 363.15) K and Predictive Results by UNIFAC-VISCO Group Contribution Method

Densities and viscosities of the binary mixtures of diethyl carbonate (DEC) with 1-propanol, 1-butanol, and 1-pentanol have been determined at (293.15 to 363.15) K and at atmospheric pressure. Excess molar volumes and viscosity deviations for the binary mixtures were fitted to the Redlich−Kister equation. Dependences of excess molar volumes and viscosity deviations with carbon chain length were discussed. The UNIFAC-VISCO method, based on contribution groups, has been used to calculate the dynamic viscosities of the binary mixtures. The percentage deviations between experimental and predicted values are given.

Excess Molar Volumes and Partial Molar Volumes of Binary Mixtures Containing Diethylcarbonate with Benzene and Substituted Benzenes at 293.15 K

Densities of the binary mixtures of diethylcarbonate with benzene and substituted benzenes, namely toluene, bromobenzene, chlorobenzene and nitrobenzene have been measured as a function of the composition, at 293.15 K and atmospheric pressure using a bicapillary pycnometer with an accuracy of 4 parts in 104.The calculated excess molar volumes, V E were correlated with Redlich-Kister equation. The excess molar volumes are negative over the entire range of composition for the systems diethylcarbonate with benzene, toluene, bromobenzene and nitrobenzene. An inversion of the sign of V E is observed over some concentration for mixtures of diethylcarbonate with chlorobenzene. Partial molar volumes, Vi are also evaluated and their values have been extrapolated to zero concentration to obtain the limiting value at infinite dilution, Vo i . The numerical values of the excess molar volumes for binary mixtures decrease in the order: chlorobenzene > benzene > bromobenzene ≈ toluene > nitrobenzene. The results are explained in terms of dissociation of the self-associated solute molecules and the formation of aggregates between unlike molecules.

Excess molar enthalpies of diethyl carbonate with o-xylene, m-xylene, p-xylene, ethylbenzene, or ethyl benzoate at 298.15 K

Excess molar enthalpies ( H E) of binary mixtures of diethyl carbonate with o-xylene, m-xylene, p-xylene, ethylbenzene, or ethyl benzoate were measured by a flow-type isothermal microcalorimeter at 298.15 K under atmospheric pressure. The experimental results show that all the excess enthalpies are positive and vary symmetrically with the mole fraction of diethyl carbonate. It was also found that the maximum values of H E are in a range of 59.7–123.4 J mol −1 for these five investigated systems. The magnitudes of the maximum H E follow the order of: m-xylene>ethylbenzene> o-xylene> p-xylene>ethyl benzoate. In addition to the Redlich–Kister equation, the Peng–Robinson and the Cubic Chain-of-Rotators equations of state were also used to correlate the experimental H E data. These two equations of state represent the H E data reasonably well, except for the system containing ethyl benzoate.

Density, Refractive Index, and Speed of Sound of Binary Mixtures (Diethyl Carbonate + Alcohols) at Several Temperatures

Density, ρ; refractive index on mixing, nD; and speed of sound, u; at 293.15 K, 298.15 K, 303.15 K, and 313.15 K and atmospheric pressure have been measured for binary mixtures of diethyl carbonate (DEC) + methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, or 1-pentanol. Excess molar volumes, VE; changes of refractive index on mixing, ΔnD; and deviations in isentropic compressibility, ΔκS; for the above systems have been calculated. The Redlich−Kister equation has been used to estimate the binary fitting parameters, and root-mean-square deviations from the regression lines are shown. The VE values were fitted as a function of the mole fraction and temperature to a polynomial equation.

Thermophysical Properties of the Binary Mixtures Diethyl Carbonate + (n-Dodecane or n-Tetradecane) at Several Temperatures

The density and the speed of sound at (288.15, 293.15, 298.15, and 308.15) K and the isobaric molar heat capacity at (288.15, 298.15, and 308.15) K of binary mixtures of diethyl carbonate with n-dodecane or n-tetradecane were measured at atmospheric pressure, over the entire composition range. These results are used to calculate molar volumes, isentropic and isothermal compressibilities, isobaric thermal expansivities, and isobaric and isochoric molar heat capacities as well as the corresponding excess quantities. Positive values and a parabolic composition dependence were found for all excess quantities except for the excess molar heat capacities, which take negative values and are W-shaped. Excess molar volumes increase with both alkyl chain length of the n-alkane and temperature. Excess isobaric molar heat capacities decrease as the size of the n-alkane increases and exhibit different temperature dependences with mole fraction. All other properties, with the exception of the excess isochoric molar heat...

Excess molar volumes of diethyl carbonate with hydrocarbons or tetrachloromethane at 25�C

The excess molar volumes V m E at atmospheric pressure and at 25°C for binary mixtures of diethyl carbonate with n-heptane, n-decane, n-tetradecane, 2,2,4-trimethylpentane, cyclohexane, benzene, toluene, or tetrachloromethane have been obtained over the whole mole-fraction range from densities measured with a vibrating-tube densimeter. The V m E are positive for all the systems investigated, except for the mixture with toluene which is negative. The results for V m E together with data previously published on excess molar enthalpies H m E and excess molar Gibbs energies G m E , suggest interactions between carbonate and hydrocarbons which are stronger with aromatic than with aliphatic hydrocarbons.

Excess Molar Enthalpy of Binary Mixtures of Diethyl Carbonate + Nine Chloroalkanes at 298.15 K and Atmospheric Pressure

Excess molar enthalpies, H m E , of binary mixtures of diethyl carbonate + nine chloroalkanes have been determined at 298.15 K and atmospheric pressure by using a flow isothermal microcalorimeter. The H m E values range from a minimum value of -2600 J mol -1 up to 340 J mol -1 . In the case of diethyl carbonate + dichloroalkanes, H m E increases with the increase of the chain length of the dichloro compound. Experimental data have been correlated by means of the Redlich-Kister equation, and adjustable parameters have been evaluated by the least-squares method.