Physico-chemical properties of di-(2-ethylhexyl) phosphoric acid with apolar solvents from ultrasonic studies

Dalai, Biswajit; Dash, S. K.; Singh, Saroj Kumar; Swain, N.; Swain, B. B.

doi:10.1080/00319104.2011.629420

Cited by 12 publications

(8 citation statements)

References 20 publications

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“…From the measured values of , , u, the thermodynamic acoustic parameters such as s , L f , Z, i , V f , V m , V a , have been computed for all the three alkanol binary mixtures as the molefraction of DEE using the following standard expressions [10][11][12][13][14][15][16] and are listed in Table 1. DEE mole fraction …”

Section: Resultsmentioning

confidence: 99%

Studies on molecular interaction in binary mixtures of diethyl ether with some alkanols – an acoustic approach

Dash

Pradhan²,

Dalai³

et al. 2012

Physics and Chemistry of Liquids

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The viscosity (), density () and ultrasonic velocity (u) of pure diethyl ether (DEE) and three alkanols, namely methanol, n-propanol and n-butanol, and their binary mixture with DEE as a common component have been experimentally measured at 303.16 K under atmospheric pressure. The experimentally measured parameters were employed to compute the values of isentropic compressibility ( s ), intermolecular free length (L f ), molar volume (V m ), acoustic impedance (Z), available volume (V a ), free volume (V f ), internal pressure ( i ) and the viscous relaxation time (). Furthermore, the deviation functions such as DV m , DV f , DV a , D, DL f , D s , DZ, D i were estimated in the entire range of DEE molefraction. The compositional variation of deviation functions were correlated to the Redlich-Kister-type polynomial equation. The sign and magnitude of deviation parameters have been interpreted in terms of H-bonding, proper interstitial accommodation in the structural process and the dipole-dipole type of molecular interactions between DEE and alkanol molecules. Theoretical values of ultrasonic velocity in all three binary mixtures have been estimated using five different empirical relations, such as Nomoto's relation, Junjie's relation, Rao's relation, Van Deal-Vageel's ideal mixing relation and impedance dependence relation. The relative merit of these relations with the measured values of ultrasonic velocity is discussed in this article. IntroductionIn continuation of our earlier work [1] on studies of molecular interactions in binary mixtures of diethyl ether (DEE) with some apolar solvents, the present investigation is extended to binary mixtures of DEE with some aliphatic alkanols using ultrasonic probe. DEE is an important nuclear extractant, which is of particular interest in the reactor technology. Evaluation of acoustic parameters, such as ultrasonic velocity, intermolecular free length, acoustic impedance and other related thermodynamic quantities, find wide range of applications in elucidating useful information for

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Section: Resultsmentioning

confidence: 99%

Studies on molecular interaction in binary mixtures of diethyl ether with some alkanols – an acoustic approach

Dash

Pradhan²,

Dalai³

et al. 2012

Physics and Chemistry of Liquids

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“…From the measured values of ultrasonic velocity (U), viscosity (ɳ) and density (), the acoustic impedance (Z), isentropic compressibility ( s ), intermolecular free length (L f ), free volume (V f ), internal pressure (π i ) and relaxation time  of a mixture are determined by using the following relations [12][13][14][15] as Z =…”

Section: Theorymentioning

confidence: 99%

Acoustic assessment in binary mixtures of a polar nuclear extractant, DEHPA with eight non polar diluents at 303.15K – a comparative study

2020

Biointerface Res Appl Chem

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Ultrasonic velocities (U), viscosities (η) and densities (ρ) of binary liquid mixtures of di–(2-ethylhexyl) phosphoric acid (DEHPA) with eight non polar diluents viz. n-pentane, n-hexane, n-heptane, benzene, carbon tetrachloride, cyclohexane, carbon disulphide and dioxane are measured at temperature 303.16 K and 0.01MPa for entire range of concentration. The measured data are used to compute acoustic impedance (Z), isentropic compressibility, intermolecular free length, free volume, internal pressure and viscous relaxation time. The excess properties are also evaluated from the measured data to study inter- and intra-molecular interaction between components of liquid mixtures. The research findings may be utilized in solvent extraction process to enhance extraction efficacy.

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“…These values were used to compute some acoustic parameters, i.e. intermolecular free length (L f ), acoustic impedance (Z) and relaxation time (τ) using standard relations [10][11][12][13][14] and are presented in table 3.…”

Section: Data Processingmentioning

confidence: 99%

“…This increment in τ suggests that the molecular association between unlike molecules is stronger than that of like molecules [10]. ) were calculated using standard relations [8][9][10][11][12][13] and displayed graphically in figures 2-7. The deviation from ideality is an indication of the presence of interaction and the magnitude as well as sign of the parameters is measure of interaction.…”

Section: Data Processingmentioning

confidence: 99%

“…In our earlier work [11][12][13], we have studied the ultrasonic response of D2EHPA with some apolar diluents, viz., benzene, carbon tetrachloride, pdioxane, cyclohexane and n-pentane and also with some polar diluents, viz., acetic acid, propionic acid and n-butyric acid. Among apolar diluents, npentane and among polar diluents, propionic acid were found to be more effective diluents compared to other liquids in the respective groups.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic and 31P NMR investigations of an acidic nuclear extractant with some monosubstituted benzenes

Dalai¹,

Dash

Singh

et al. 2016

The Journal of Chemical Thermodynamics

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A B S T R A C TThe ultrasonic velocity, density and viscosity of an acidic nuclear extractant namely di (2-ethylhexyl) phosphoric acid (D2EHPA) and its binary mixtures with three monosubstituted benzenes, viz., nitrobenzene, chlorobenzene and toluene were determined at temperature T = 303.15 K and at pressure p = 0.1MPa. The experimental values were utilized to compute relaxation time, excess molar volume, excess Gibbs energy of activation of viscous flow, deviations in intermolecular free length, acoustic impedance, ultrasonic velocity and viscosity. The excess / deviation functions were fitted to fourth order Redlich-Kister type polynomial equation to estimate binary coefficients and standard errors between experimental and calculated data. The nature of these functions was utilized to speculate the nature of molecular interaction between component molecules of all studied binary mixtures. Furthermore, 31 P NMR spectra of pure D2EHPA and its binary mixtures with the monosubstituted benzenes were used to assess molecular interactions between components of liquid mixtures at microscopic level and to corroborate with the results obtained from bulk properties of liquid mixtures.

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Physico-chemical properties of di-(2-ethylhexyl) phosphoric acid with apolar solvents from ultrasonic studies

Cited by 12 publications

References 20 publications

Studies on molecular interaction in binary mixtures of diethyl ether with some alkanols – an acoustic approach

Studies on molecular interaction in binary mixtures of diethyl ether with some alkanols – an acoustic approach

Acoustic assessment in binary mixtures of a polar nuclear extractant, DEHPA with eight non polar diluents at 303.15K – a comparative study

Ultrasonic and 31P NMR investigations of an acidic nuclear extractant with some monosubstituted benzenes

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