scholarly journals Ethylene Glycol as Entrainer in 1-Propanol Dehydration: Scrutiny of Physicochemical Properties of Ethylene Glycol+1-Propanol Binary Mixture at Different Temperatures

2019 ◽  
Vol 8 (12S) ◽  
pp. 229-234
Keyword(s):  
Hydrogen Bond ◽  
Binary Mixture ◽  
Ethylene Glycol ◽  
Molar Volume ◽  
Polynomial Equation ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Hydrogen Bond Interactions ◽  
Molar Polarization ◽  
Different Temperatures

Density (ρ), and dielectric permittivity (ε) of the binary mixture of ethylene glycol + 1- propanol have been determined as a function of mole fraction of ethylene glycol at T = (298, 308 and 313)K. These measurements have been employed to compute thermodynamic properties like molar volume (V), and molar polarization (P) of the liquid mixtures. Excess properties such as VE, εE and PE for the binary mixture have also been calculated at different temperatures. In order to calculate the standard deviations of the excess properties, Redlich – Kister polynomial equation was used. The negative and positive values of the excess properties predicted the type and strength of molecular interactions between the components in the binary mixture.The excess molar volume for the mixture at all temperatures is found to be negative. The εE values for ethylene glycol + 1-propanol has been found to be negative at 298K and but positive values are obtained at 308 and 313K. The divergent magnitudes of εE values at different temperatures have been attributed to different strengths of hydrogen bond interactions as well as alignments of net dipoles.

Excess properties for binary liquid mixtures of propionic acid with aniline derivatives

1991 ◽  
Vol 69 (3) ◽  
pp. 369-372 ◽  
Author(s):  
Begoña Garcia ◽  
Rafael Alcalde ◽  
José M. Leal
Keyword(s):  
Propionic Acid ◽  
Dipole Moments ◽  
Specific Interaction ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Free Energies ◽  
Empirical Parameter ◽  
Excess Viscosities ◽  
Different Temperatures ◽  
Mole Volume

Excess viscosities, excess volumes, and excess free energies of activation for flow of the binary mixtures containing propionic acid with aniline, o-toluidine, o-anisidine, and o-chloroaniline were determined at five different temperatures from density and viscosity measurements. Based on the Regular Solutions Theory, the empirical parameter θ was calculated; this parameter is related to the viscosity, and also denotes the extent of the non-ideality of the system. The results obtained suggest the existence of acid–base interactions, as well as the formation of 1:2 complexes for the three first mixtures, and 2:1 complexes for o-chloro-aniline + propionic acid. The extent of the specific interaction decreases with an increase in the strength of the base, and increases with an increase in the dipole moments. The equatioin [Formula: see text] is proposed for predicting the mole volume of the mixtures, V, at any composition, Xi, as a function of the mole volumes of the pure components, Vi. Key words: binary mixture, excess properties, predicting mole volumes, propionic acid.

scholarly journals Densities, Viscosities and Excess Properties for Dimethyl Sulfoxide with Diethylene Glycol and Methyldiethanolamine at Different Temperatures

2021 ◽  
Vol 12 (1) ◽  
pp. 116
Author(s):  
Maria Magdalena Budeanu ◽  
Vasile Dumitrescu
Keyword(s):  
Molar Volume ◽  
Diethylene Glycol ◽  
Atmospheric Pressure ◽  
Binary Systems ◽  
Partial Molar Volumes ◽  
Excess Properties ◽  
Excess Functions ◽  
Viscosity Deviation ◽  
Different Temperatures ◽  
Experimental Density

Densities and viscosities of the binary systems dimethylsulfoxide with diethylene glycol and methyldiethanolamine were measured at temperatures ranging from 293.15 to 313.15 K, at atmospheric pressure and over the entire composition range. The experimental density data was correlated as a function of composition using Belda’s and Herraez’s equations, and as a function of temperature and composition using the models of Emmerling et al. and Gonzalez-Olmos-Iglesias. The viscosity results were fitted to the Grunberg-Nissan, Heric-Brewer, Wilson, Noda, and Ishida and Eyring-NRTL equations. The values of viscosity deviation (), excess molar volume (VE), partial molar volumes ( and ) and apparent molar volume ( and ) were determined. The excess functions of the binary systems were fitted to the polynomial equations. The values of thermodynamic functions of activation of viscous flow were calculated and discussed.

scholarly journals On the reduced Redlich-Kister excess properties for 1,2-dimethoxyethane with propylene carbonate binary mixtures at temperatures (from 298.15 to 318.15) K.

2017 ◽  
Vol 6 (2) ◽  
pp. 33-41 ◽  
Author(s):  
Hanen Salhi ◽  
Shaik Babu ◽  
Nada Al-Eidan ◽  
Nejib H. Mekni ◽  
Noura Omar Al-Otaibi ◽  
...  
Keyword(s):  
Propylene Carbonate ◽  
Specific Interaction ◽  
Activation Parameters ◽  
Liquid Mixtures ◽  
Excess Properties ◽  
Effect Of Temperature ◽  
Present System ◽  
Molar Gibbs Free Energy ◽  
Free Energy Of Activation ◽  
Different Temperatures

Values of excess properties in 1,2-dimethoxyethane + propylene carbonate binary liquid mixtures at different temperatures from experimental density and viscosity values presented in earlier work, were used to test the applicability of the correlative reduced Redlich-Kister functions and the Belda equation, and to reveal eventual specific interaction hidden by the classical treatment of direct excess Redlich-Kister functions. Their correlation ability at different temperatures, and the use of different numbers of parameters, is discussed for the case of limited experimental data. The relative Redlich-Kister functions are important to reduce the effect of temperature and, consequently, to reveal the effects of different types of interactions. Values of limiting excess partial molar volume at infinite dilution deduced from different methods were discussed. Also, the activation parameters and partial molar Gibbs free energy of activation of viscous flow against compositions were investigated. Correlation between the two Arrhenius parameters of viscosity shows the existence of main different behaviors separated by a stabilized structure in a short range of mole fraction in 1,2-dimethoxyethane (0.45 to 0.83). In this context, the correlation Belda equation has also been applied to the present system for thermodynamic properties in order to reveal eventual solute-solvent interaction at high dilution.

scholarly journals Density and Comparative Refractive Index Study on Mixing Properties of Binary Liquid Mixtures of Eucalyptol with Hydrocarbons at 303.15, 308.15 and 313.15 K

2007 ◽  
Vol 4 (3) ◽  
pp. 343-349 ◽  
Author(s):  
Sangita Sharma ◽  
Pragnesh B. Patel ◽  
Rignesh S. Patel ◽  
J. J. Vora
Keyword(s):  
Refractive Index ◽  
Polynomial Equation ◽  
Liquid Mixtures ◽  
Binary Liquid Mixtures ◽  
Average Deviation ◽  
Mixing Properties ◽  
Binary Liquid ◽  
Index Study ◽  
Different Temperatures ◽  
Mole Fraction Range

Density and refractive index have been experimentally determined for binary liquid mixtures of eucalyptol with hydrocarbons (o-xylene,m-xylene and toluene) at 303.15 K, 308.15 K and 313.15 K. A comparative study of Lorentz-Lorenz (L-L), Weiner (W), Heller (H), Gladstone-Dale (G-D), Arago-Biot (A-B), Eykman (Eyk), Newton (Nw), Eyring-John (E-J) and Oster (Os) relations for determining the refractive index of a liquid has been carried out to test their validity for the three binaries over the entire mole fraction range of eucalyptol at 303.15 K, 308.15 K and 313.15 K. Comparison of various mixing rules has been expressed in terms of average deviation. From the experimentally measured values, refractive index deviations at different temperatures have been computed and fitted to the Redlich-Kister polynomial equation to derive the binary coefficients and standard deviations.

scholarly journals Excess Transport Properties of Binary Mixtures of Quinoline with Xylenes at Different Temperatures

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sk. Fakruddin ◽  
Ch. Srinivasu ◽  
B. R. Venkateswara Rao ◽  
K. Narendra
Keyword(s):  
Ultrasonic Velocity ◽  
Acoustic Impedance ◽  
Adiabatic Compressibility ◽  
Polynomial Equation ◽  
Liquid Mixtures ◽  
Excess Functions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Excess Parameters ◽  
Different Temperatures

The ultrasonic velocity and density of binary liquid mixtures of quinoline with o-xylene, m-xylene, and p-xylene have been measured over the entire range of composition at = 303.15, 308.15, 313.15, and 318.15 K. Using these data, various parameters like adiabatic compressibility (β), intermolecular free length (), and acoustic impedance () and some excess parameters like excess adiabatic compressibility (), excess intermolecular free length (), excess acoustic impedance (), and excess ultrasonic velocity () have been calculated for all the three mixtures. The calculated deviations and excess functions have been fitted to Redlich-Kister polynomial equation. The observed deviations have been explained on the basis of the intermolecular interactions present in these mixtures.

scholarly journals Partial Molar Volumes and Spectral Studies on Binary Mixtures of p-Chloroacetophenone with Aniline and N-Alkyl Anilines

2019 ◽  
Vol 31 (10) ◽  
pp. 2173-2180
Author(s):  
M. Radha Sirija ◽  
D. Bala ◽  
D. Ramachandran
Keyword(s):  
Binary Mixtures ◽  
Partial Molar Volumes ◽  
Polynomial Equation ◽  
Isentropic Compressibility ◽  
Liquid Mixtures ◽  
Spectral Studies ◽  
Viscosity Data ◽  
Molar Volumes ◽  
Different Temperatures ◽  
Semi Empirical

Ultrasonic velocities (u), viscosities (η) and densities (ρ) were measured for the binary mixtures of p-chloroacetophenone with aniline, N-methylaniline and N,N-dimethylaniline over the whole range of composition at different temperatures (303.15 K to 318.15 K) and at atmospheric pressure 0.1 MPa. Excess molar volume (VE), deviation in viscosity (Δη) and deviation in isentropic compressibility (Δks) have been calculated and fitted to Redlich-Kister polynomial equation to obtain their coefficients and standard deviations. The analyzed viscosity data of binary liquid mixtures were used to test the Grunberg-Nissan, Katti-Chaudari and Hind semi-empirical equations. The FTIR spectral study supports the experimental data to explain the molecular interactions between unlike molecules. Partial molar volumes of binary mixtures were evaluated for better understanding of intermolecular interactions of the above binary mixtures.

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