Refractive properties of binary mixtures containing 1, 2-dichloroethane+ 2-methoxyethanol or 1, 2-dimethoxyethane (original) (raw)
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Journal of Chemical & Engineering Data, 2014
This paper reports experimental data of density and refractive index for the binary systems of 1-butyl-3-methylimidazolium tetrafluoroborate, [Bmim][BF4], with 1,4-dioxane, and 1-ethyl-3-methylimidazolium tetrafluoroborate, [Emim][BF4], with 1,4-dioxane and ethylene glycol (EG). Moreover, for the system [Bmim][BF4] + EG we report here refractive index data. The measurements for the systems with EG were made over the entire composition range at atmospheric pressure (101 ± 2 kPa) and in the temperature range from (293.15 to 353.15) K for densities and from (298.15 to 323.15) K for refractive indices. Because at room temperature the mixtures of both ionic liquids with 1,4-dioxane have indicated partial immiscibility, liquid−liquid phase equilibrium was determined. The excess molar volumes, V E , and deviations in refractive index, Δn, were calculated by using the measured experimental data and correlated by the Redlich−Kister type equations. V E values are positive for the system with EG and negative for both systems with 1,4-dioxane, Δn presenting an opposite sign. To probe the interactions in mixtures and to correlate the excess molar volumes of the mixtures the Prigogine−Flory−Patterson (PFP) theory has been used. Moreover, to correlate V E and predict density and refractive index of the mixtures the Lorentz− Lorenz equation was applied.
Journal of Chemical & Engineering Data, 2012
Refractive indices and densities of the 2-propanol + water + 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]-[BF 4 ]) ternary system have been measured at 298.15 K. Physical properties of 2-propanol + water and water + [bmim][BF 4 ] binary mixtures have also been measured at the same temperature, whereas the 2-propanol + [bmim] [BF 4 ] mixture has been measured at 323.15 K, because the total miscibility for this mixture is achieved above this temperature. Molar volume and excess properties have been calculated from the experimental data to analyze the behavior of the mixtures. The refractive index has been correctly adjusted to a third-order polynomial expansion model, whereas density has been adjusted to a second-order equation. Excess molar volumes and refractive index deviations have been successfully fitted to the Redlich−Kister model. a Standard uncertainties u are u(n D ) = 0.0001 and u(ρ) = 0.00001 g·cm −3 . Article pubs.acs.org/jced
Journal of Chemical and Engineering Data, 1995
Densities and refractive indices for the binary mixtures involving four different Protic Ionic Liquids (PILs) namely (2-Hydroxyethanaminium formate [HEF] + methanol), (2-Hydroxyethanaminium acetate [HEA] + methanol), (2-Hydroxyethanaminium propionate [HEP] + methanol), and (2-Hydroxyethanaminium lactate [HEL] + methanol) have been measured at the temperature range from 293.15 to 313.15 K and at atmospheric pressure.
Journal of Chemical & …, 2011
Densities, viscosities, and refractive indices of mixing of methyl ethyl ketone with 1-pentanol, 2-pentanol, and 3-pentanol have been measured as a function of composition range at temperatures (298.15, 308.15, and 318.15) K and ambient pressure. Excess molar volumes V m E , viscosity deviations ∆η, and refractive index deviations ∆n D were calculated and correlated by the Redlich-Kister-type function to derive the coefficients and estimate the standard error. From the experimental data, partial molar volumes, V j m,i , and partial molar volumes at infinite dilution, V j m,i 0 , were also calculated. The latter values are interesting from a theoretical point of view since at infinite dilution the only interactions present are solute-solvent interactions. The effect of temperature and -OH group position of pentanol isomers on the excess molar volumes, viscosity, and refractive index deviations of its mixtures with methyl ethyl ketone is discussed in terms of the nature and type of intermolecular interactions in binary mixtures.
Theoretical Evaluation of Refractive Index in Binary Liquid Mixtures
E-Journal of Chemistry, 2005
The density and refractive index (RI) for four binary liquid mixtures: diethyl malonate + dimethylformamide (DEM+DMF), diethyl malonate + Hexane (DEM+HEX), diethyl malonate + tetrahydrofuran (DEM+THF), diethyl malonate + 1,4-dioxane (DEM+DO) have been measured. The experimental values are compared with those calculated from Lorentz-Lorentz, Heller, Newton and Gladstone -Dale mixing rules.
Mediterranean Journal of Chemistry, 2014
Different artificial neural networks architectures were developed to predict the density, viscosity and refractive index of binary and ternary mixtures of ionic liquids using their individual properties. All neural network implemented were evaluated using the root mean square error (RMSE) and the average percentage deviations (APD) for the training and validation phase. The individual models implemented show great values of R2 (greater than 9.995∙10-01) and low errors in terms of RMSE, that corresponds with an APD less than 7.766∙10-02 %, with the exception of the model for the prediction of viscosity where the error raised to 3.338 %. The results show that the different individual artificial neural networks implemented are a useful tool to predict the density, viscosity and refractive index of binary and ternary mixtures of ionic liquids and with reasonably accuracy. Â