Densities and Excess Molar Volumes of 2-Butanol + Cyclohexanamine + Heptane and 2-Butanol + <i>n</i>-Heptane at Temperatures between (288.15 and 323.15) K

Kijevčanin, Mirjana Lj.; Radović, Ivona R.; Šerbanović, Slobodan P.; Djordjević, Bojan D.

doi:10.1021/je900715y

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…Activity coefficient nonrandom two liquid model (NRTL) , is chosen to correlate the binary experimental data. This work represents continuation of our ongoing research in the area of experimental determination of thermodynamic properties of mixtures − and liquid–liquid equilibria …”

Section: Introductionmentioning

confidence: 79%

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Cloud Point Phenomena in the (Aniline or N,N-Dimethylaniline + Water) Solutions, and Cosolvent Effects of Liquid Poly(ethylene glycol) Addition: Experimental Measurements and Modeling

Grozdanić

Soldatović²,

Šerbanović

et al. 2015

J. Chem. Eng. Data

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In this work, liquid phase behavior (cloud point phenomena) was studied for two binary and four aqueous pseudobinary systems containing aniline or N,N-dimethylaniline and poly(ethylene glycol) 200 or poly(ethylene glycol) 400, (PEG200 and PEG400, respectively) in the temperature range T = (290.15 to 351.15) K and an ambient pressure of 0.1 MPa. Experimental data (cloud-points) were obtained by the visual cloud point method. The studied systems exhibit an upper critical solution temperature (UCST) type of phase behavior and the immiscibility increases with increasing the average molar mass of poly(ethylene glycols). PEG200/PEG400 showed as a good cosolvent for aniline in water. The experimental data were correlated using non-random two-liquid model (NRTL) with one form of temperature dependent parameters.

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Section: Introductionmentioning

confidence: 79%

“… a Standard uncertainty u for each variable is u ( T )=1K; u ( p )=5%, and the combined expanded uncertainty uc is uc (ρ)= ± 1·10 –2 kg·m –3 , with 0.95 level of confidence ( k ≈ 2), e Hyeon-Deok et al d Gorisankar et al b Visak et al c Ottani et al …”

Section: Methodsmentioning

confidence: 99%

Cloud Point Phenomena in the (Aniline or N,N-Dimethylaniline + Water) Solutions, and Cosolvent Effects of Liquid Poly(ethylene glycol) Addition: Experimental Measurements and Modeling

Grozdanić

Soldatović²,

Šerbanović

et al. 2015

J. Chem. Eng. Data

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“…The specifications of chemicals are given in Table . The purity of each component was further affirmed by comparing its density and refractive index with the corresponding literature values − as shown in Table .…”

Section: Methodsmentioning

confidence: 99%

Liquid–Liquid Equilibria, Density, Refractive Index, and Solubility for Mixtures of Water + Methanol + Heptane + Methylbenzene or + Dimethyl Carbonate at T = 298.15 K

Lin

Lai

2013

J. Chem. Eng. Data

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New liquid−liquid equilibrium (LLE) data are presented for the quaternary system of water + methanol + heptane + methylbenzene at T = 298.15 K under atmospheric conditions. The quaternary mixtures were prepared by mixing pure water, methanol, and an equimolar mixed (heptane + methylbenzene). A quinary system containing these compounds and dimethyl carbonate (DMC) was also studied at the same temperature. The quinary mixtures were obtained with three mole fractions (0.25, 0.50, and 0.75) of DMC in the binary (methanol + DMC) mixtures. The compositions of liquid phases at equilibrium were determined by gas− liquid chromatography. The consistency of the experimental LLE data has been confirmed according to the Othmer−Tobias and the Hand correlations. The water composition in the organic phase and the hydrocarbon solubility in the aqueous phase were analyzed in terms of (methanol + DMC) in the global composition. The distributions of methanol and DMC between the aqueous phase and the organic phase were also discussed. The experimental LLE data were correlated with the nonrandom two-liquid (NRTL) and the universal quasichemical activity coefficient (UNIQUAC) solution models, and the binary interaction parameters were collected. The density and refractive index at each LLE composition of each conjugate phase were measured at T = 298.15 K. Densities were determined using a vibrating-tube densimeter. Refractive indexes were measured using a digital Abbe-type refractometer. The solubility data were obtained by the cloud point method for the pseudoternary system with water (1) + (methanol + DMC) (2) + (0.50 heptane + 0.50 methylbenzene) (3) at T = 298.15 K. The system exhibited a large partially miscible region in the phase diagram of Gibbs triangle. The region of heterogeneity was found to decrease with an adequate blending of DMC with methanol.

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“…Figure 8. Relative deviations between experimental data sets for n-Heptane [11,[25][26][27][28][29][30][31][32] and values calculated from the new model. Values calculated from the equations by Span and Wagner [11] and by Cibulka et al [13] are plotted for comparison.…”

Section: Asia-pacific Journal Of Chemical Engineeringmentioning

confidence: 99%

A new semi‐empirical equation for compressed liquid densities of n‐alkanes

Sun

Wang

Liu

2012

Asia-Pacific J Chem Eng

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In this work, a new six‐parameter semi‐empirical equation has been developed for the predictions of the compressed liquid densities of n‐alkanes from C2 to C10. The resulting functional form was established with the quasi‐Newton optimization algorithm, which considers the experimental data sets for different fluids simultaneously. During the fitting process, the functional form of the equation is numerically very stable, and the substance‐specific coefficients can be obtained easily. The calculated values from the new model were compared with the available experimental data and the values from reference equations in the literature. In most cases, the deviations are not more than ±0.5% for temperatures up to 0.7 times the critical temperature, whereas the agreement is within ±1.0% in the temperature range from the triple point to the critical point at reduced pressure up to 15. It was shown that the new semi‐empirical equation was able to represent the compressed liquid densities of n‐alkanes in wide thermodynamic ranges. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.

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Densities and Excess Molar Volumes of 2-Butanol + Cyclohexanamine + Heptane and 2-Butanol + n-Heptane at Temperatures between (288.15 and 323.15) K

Cited by 15 publications

References 9 publications

Cloud Point Phenomena in the (Aniline or N,N-Dimethylaniline + Water) Solutions, and Cosolvent Effects of Liquid Poly(ethylene glycol) Addition: Experimental Measurements and Modeling

Cloud Point Phenomena in the (Aniline or N,N-Dimethylaniline + Water) Solutions, and Cosolvent Effects of Liquid Poly(ethylene glycol) Addition: Experimental Measurements and Modeling

Liquid–Liquid Equilibria, Density, Refractive Index, and Solubility for Mixtures of Water + Methanol + Heptane + Methylbenzene or + Dimethyl Carbonate at T = 298.15 K

A new semi‐empirical equation for compressed liquid densities of n‐alkanes

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