Density, speed of sound, and refractive index measurements for the binary systems (butanoic acid+propanoic acid, or 2-methyl-propanoic acid) at T=(293.15 to 313.15)K

Bahadur, Indra; Deenadayalu, Nirmala; Naidoo, Paramespri; Ramjugernath, Deresh

doi:10.1016/j.jct.2012.07.019

Cited by 59 publications

(8 citation statements)

References 41 publications

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“…HPLC-grade water was used to calibrate both instruments. The measured data together with the literature values − are given in Table . According to the measurement conditions, the estimated uncertainties of the density and refractive index measurements were 0.0007 g·cm –3 and 0.0005 n D , respectively.…”

Section: Methodsmentioning

confidence: 99%

Comparative Analysis of Liquid–Liquid Equilibria for Aqueous Systems of Propionic Acid with Structurally Similar Aryl Solvents

Gilani

Kashef

Khanghah

2020

Ind. Eng. Chem. Res.

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Liquid−liquid phase equilibria were comparatively studied for the aqueous mixtures of propionic acid with four structurally similar aryl compounds (2-phenylethanol, 1-phenylpropanol, propiophenone, and methyl benzoate) as a function of the mixture composition at T = 298.2 K and p = 0.1 MPa. The cloud point data were measured, and the corresponding solubility diagrams for the studied ternary systems were plotted. Tie lines were measured by the analysis of both the aqueous and organic phases. All of the ternary systems display the type-1 liquid−liquid equilibrium (LLE) behavior. The quality of tie lines was confirmed by the linear behavior of the Othmer−Tobias plot. The thermodynamic model of NRTL was successfully used to correlate the experimental tie lines, and the model binary interaction parameters were determined. Evaluation of the extracting ability of the aryl solvents was performed by the estimation of the solute distribution coefficients and selectivities. Finally, all of the studied aryl solvents are appropriate separating agents for aqueous propionic acid mixtures.

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Section: Methodsmentioning

confidence: 99%

Comparative Analysis of Liquid–Liquid Equilibria for Aqueous Systems of Propionic Acid with Structurally Similar Aryl Solvents

Gilani

Kashef

Khanghah

2020

Ind. Eng. Chem. Res.

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“…Regarding the measurement interval, the standard uncertainties for the density and refractive index measurements were estimated to be 0.0005 g·cm –3 and 0.0005, respectively. The measured density and refractive index data together with the experimental values reported by other authors − are summarized in Table . To determine water content in the organic layer, the Karl Fisher titration was performed with a Metrohm 870 KF Titrino plus titrator.…”

Section: Methodsmentioning

confidence: 99%

“…58−60 Thus, only a short explanation about procedure and measurements is given here. For a better understanding, the LLE procedure was separated into three interactive [57] a Standard uncertainties u are u(T) = 0.2 K, u(n D ) = 0.0005, and u(ρ) = 0.0010 g•cm −3 , u(p) = 1 kPa. b T = 293.15 K. c The structural parameters (r and q) values for the aromatic esters were estimated by the group contribution method 42 (as a sum of the group volume r i and group surface area q i parameters).…”

Section: ■ Introductionmentioning

confidence: 99%

Experimental and Correlated Liquid–Liquid Equilibrium Data for (Water + Propionic Acid + Ethylbenzene or Benzyl Benzoate) Ternary Systems

Gilani

Kashef

2020

J. Chem. Eng. Data

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This paper reports the ternary liquid−liquid equilibrium (LLE) data for water−propionic acid−ethylbenzene at T = (308.2 and 318.2) K and water− propionic acid−benzyl benzoate systems at T = (298.2, 308.2, and 318.2) K and p = 0.1 MPa for the first time. Solubility data and mutual solubilities between ethylbenzene or benzyl benzoate and water were measured using the traditional cloud point method. Tie lines were experimentally obtained using acidimetric titration, the Karl Fisher titration and the refractive index measurements on the both aqueous and organic phases. The ternary systems exhibit type-1 phase behavior. The reliability of the tie-line data exhibited linear behavior in the Hand and Othmer−Tobias correlation plots. The experimental tie line data were correlated using the nonrandom two-liquid and universal quasichemical thermodynamic models, and the corresponding binary interaction parameters were determined. The results demonstrate the capability of the two models in correlation and description of the phase behavior of the related ternary systems with acceptable average root-mean-square deviation (rmsd) values. As a result, temperature has only a minor effect on the LLE behavior of the system containing benzyl benzoate.

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“…N -Methyl pyrrolidone, epichlorohydrin, ethanoic acid, propanoic acid, methanol, acetonitrile, hexane, and acetone were purchased from Fluka Chemicals with purity of ≥99% by mass. The densities and speed of sound of the pure ethanoic acid, propanoic acid, and ionic liquids were compared with literature at 298.15 K and are presented in Table . − The percentage of moisture content was found to be 0.05% in [EPMpyr] + [Cl] − using Karl Fischer instrument.…”

Section: Methodsmentioning

confidence: 99%

Influence of Epoxy Group in 2-Pyrrolidonium Ionic Liquid Interactions and Thermo-Physical Properties with Ethanoic or Propanoic Acid at Various Temperatures

Arumugam

Redhi

Gengan

2016

ACS Sustainable Chem. Eng.

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In this present study, the interaction between a carboxylic acid and ionic liquids, in terms of their binary mixtures and corresponding thermo-physical properties, was investigated. Here, the novel ionic liquid (IL) [EPMpyr] + [Cl] − was synthesized, and it has been mixed with ethanoic or propanoic acids. The influence of the epoxy group in this ionic liquid was more strongly affected with the acids, and their physicochemical properties at varied temperatures are discussed in term of density (ρ), viscosity (η), speed of sound (u), and refractive index (n) measurements. The density (ρ), speed of sound (u), viscosity (η), and refractive index (n) of the IL, ethanoic acid, propanoic acid, and their corresponding binary mixtures {[([EPMpyr] + [Cl] − (1) + ethanoic or propanoic acid (2)} have been measured at T = (293.15−313.15) K and at P = 0.1 MPa. The theoretical thermodynamic properties of excess molar volumes (V m E ), isentropic compressibility (k s ), deviation in isentropic compressibility (Δk s ), and intermolecular free length (L f ) are calculated using experimental density and speed of sound data. The V m E and Δk s values for both binary mixtures were found to be negative over the entire mole fraction range of composition at all the investigated temperatures. These results suggest the existence of specific interactions between components in the molecules. The experimental data could be helpful to understand the molecular interactions between the IL and carboxylic acid combinations. The experimental data were fitted to the Redlich−Kister polynomial equation.

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Density, speed of sound, and refractive index measurements for the binary systems (butanoic acid+propanoic acid, or 2-methyl-propanoic acid) at T=(293.15 to 313.15)K

Cited by 59 publications

References 41 publications

Comparative Analysis of Liquid–Liquid Equilibria for Aqueous Systems of Propionic Acid with Structurally Similar Aryl Solvents

Comparative Analysis of Liquid–Liquid Equilibria for Aqueous Systems of Propionic Acid with Structurally Similar Aryl Solvents

Experimental and Correlated Liquid–Liquid Equilibrium Data for (Water + Propionic Acid + Ethylbenzene or Benzyl Benzoate) Ternary Systems

Influence of Epoxy Group in 2-Pyrrolidonium Ionic Liquid Interactions and Thermo-Physical Properties with Ethanoic or Propanoic Acid at Various Temperatures

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