<b>Excess molar volumes, and refractive index of binary mixtures of glycerol + methanol and glycerol + water at 298.15 K and 303.15 K</b>

The excess molar volumes of twenty two binary mixtures containing various groups of organic compounds: alcohols (ethanol, 1-propanol, 1,2-propanediol, 1,3-propanediol and glycerol), ketone (acetone), ester (butyl lactate), lactam (N-methyl-2-pyrrolidone), PEGs (PEG 200, PEG 400) and aromatics (benzene, toluene and pyridine) were predicted from the refractive index data, using three types of equations coupled with several mixing rules for refractive index calculations: the Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Biot, Newton, and Oster. The obtained results were analysed in terms of the applied equation and mixing rule and the nature of interactions between the mixtures? components.

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Thermophysical properties of biofuel components derived from biomass

10.51415/10321/1732 ◽

2016 ◽

Author(s):

◽

Mbalenhle B. Nduli

Keyword(s):

Refractive Index ◽

Molar Volume ◽

Binary Mixtures ◽

Thermophysical Properties ◽

Excess Molar Volume ◽

Excess Molar Volumes ◽

Isentropic Compressibility ◽

Lorenz Equation ◽

Molar Volumes ◽

Increasing Temperature

The thermophysical properties of the binary mixtures containing biofuel components derived from biomass were determined. Experimental densities, speed of sound, and refractive indices for the binary mixtures (methanol or 1-ethyl-3-methylimidazolium acetate [EMIM][OAc] + furfural or furfuryl alcohol ) were measured at T = (298.15, 303.15, 308.15, 313.15 and 318.15) K. From the experimental data, excess molar volume, E m V , isentropic compressibility, s  , molar refractions, R, and deviation in refractive index, Δn, were calculated. The excess molar volumes were found to be negative for all systems studied. The isentropic compressibility were found to be both positive for the whole composition and temperature range and increases slightly with increasing temperature. The deviation in refractive index was positive over the whole composition range. The obtained values of excess molar volumes and changes of refractive index on mixing were satisfactorily correlated by the Redlich–Kister equation. The Lorentz–Lorenz equation was applied to predict the density and calculate the excess molar volume of the binary mixtures.

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Measurement and Modeling the Excess Molar Volumes and Refractive Index Deviations of Binary Mixtures of 2-Propanol, 2-Butanol and 2-Pentanol with N-Propylamine

Journal of Solution Chemistry ◽

10.1007/s10953-017-0683-y ◽

2017 ◽

Vol 46 (12) ◽

pp. 2135-2158 ◽

Cited By ~ 6

Author(s):

H. Iloukhani ◽

M. Soleimani

Keyword(s):

Refractive Index ◽

Binary Mixtures ◽

Excess Molar Volumes ◽

Molar Volumes ◽

Refractive Index Deviations

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Correlation and prediction of the physical and excess properties of the ionic liquid 1-butyl-3-methylimidazolium methyl sulphate with several alcohols at T= (298.15 to 313.15) K

10.51415/10321/876 ◽

2013 ◽

Author(s):

◽

Sangeeta Singh

Keyword(s):

Refractive Index ◽

Ionic Liquid ◽

Binary Mixtures ◽

Binary Systems ◽

Excess Molar Volumes ◽

Partial Molar Volumes ◽

Excess Properties ◽

Excess Isentropic Compressibilities ◽

Molar Volumes ◽

Isentropic Compressibilities

The thermodynamic properties of binary liquid mixtures using an ionic liquid (IL) with alcohols were determined at different temperatures. The ionic liquid used was 1-butyl-3- methylimidazolium methylsulphate [BMIM]+[MeSO4]-. Densities, speed of sound, and refractive indices for the binary mixtures ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or 1-butanol) were experimentally measured over the whole range of composition at T = (298.15, E 303.15, 308.15, and 313.15) K. From the experimental data, excess molar volumes, V m , E , deviations in refractive isentropic compressibilities, κ s , excess isentropic compressibilities, κ S indices, ∆n, and molar refractions, R, were calculated. The excess partial molar volumes were also calculated at T = 298.15 K. For the binary systems, ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or E E E 1-butanol) V m and κ S are always negative and V m decrease slightly when the temperature increases. The refractive index deviation at T = (298.15, 303.15, 308.15, and 313.15) K is positive over the whole composition range. The measured negative values for excess molar volume of these mixtures ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or 1-butanol) indicate strong ion-dipole interactions and packing between alcohols and IL are present. The Redlich-Kister smoothing polynomial equation was satisfactorily applied for the E E fitting of the V m , κ S , and ∆n data to give the fitting parameters and the root-mean-square deviations. The Lorentz-Lorenz (L-L) equation was also used to correlate the volumetric property and predict the density or refractive index of the binary mixtures of ionic liquid and the organic solvents. The Lorentz-Lorenz approximation gives a higher σ when used to correlate the iiiexcess molar volumes for the mixtures ([BMIM]+[MeSO4]- + methanol, or 1-propanol, or 2-propanol, or 1-butanol). The L-L equation gives good results for the prediction of density and refractive index. The results are discussed in terms of solute-solute, solute-solvent and solvent- solvent interactions.

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Excess molar volumes, deviations in viscosity and refractive index of the binary mixtures of mesitylene with ethanol, propan-1-ol, propan-2-ol, butan-1-ol, pentan-1-ol, and 3-methylbutan-1-ol at 298.15, 303.15, and 308.15 K

Journal of Molecular Liquids ◽

10.1016/j.molliq.2006.02.007 ◽

2006 ◽

Vol 129 (3) ◽

pp. 147-154 ◽

Cited By ~ 46

Author(s):

Venkatesh Mutalik ◽

Lata S. Manjeshwar ◽

Malladi Sairam ◽

Tejraj M. Aminabhavi

Keyword(s):

Refractive Index ◽

Binary Mixtures ◽

Excess Molar Volumes ◽

Molar Volumes

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Prediction of excess molar volumes of binary mixtures of organic compounds from refractive indices

Chemical Papers ◽

10.2478/s11696-008-0027-x ◽

2008 ◽

Vol 62 (3) ◽

Cited By ~ 4

Author(s):

Ivona Radović ◽

Mirjana Kijevčanin ◽

Marijan Gabrijel ◽

Slobodan Šerbanović ◽

Bojan Djordjević

Keyword(s):

Refractive Index ◽

Organic Compounds ◽

Binary Mixtures ◽

Excess Molar Volumes ◽

Intermolecular Forces ◽

Alcohol Molecule ◽

Molar Volumes ◽

Organic Species ◽

Diverse Groups ◽

Refractive Index Data

AbstractThe excess molar volumes of 51 binary mixtures containing diverse groups of organic compounds: alcohols (methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol, hexan-1-ol, and heptan-1-ol), (cyclo-) alkanes (hexane, heptane, octane, nonane, decane, undecane, dodecane, and cyclohexane), esters (diethyl carbonate and ethyl chloroacetate), aromatics (o-xylene, m-xylene, p-xylene, and ethylbenzene), ketones (acetone), and ethers (anisole), were predicted from the refractive index data, using three types of equations coupled with several different mixing rules for refractive index calculations: the Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Biot, Newton, and the Oster. These systems were chosen since they belong to different classes of organic species forming molecular interactions and intermolecular forces during mixing resulting in positive or negative, smaller or larger deviations from ideal behaviour. The obtained results were analysed in terms of the applied equation and mixing rule, the nature of compounds of the mixtures and the influence of alkyl chain length of the alkane or alcohol molecule.

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