Extraction of acetonitrile from aqueous mixtures. 2. Ternary liquid equilibriums

Rao, D. Subba; Rao, K. Venkateswara; Prasad, Abha; Chiranjivi, C.

doi:10.1021/je60082a014

Cited by 28 publications

(10 citation statements)

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“…The relative selectivity values of butan-1-ol and methylpropan-1-ol as a potential solvent are significantly lower than for chlorobenzene, xylene (mixed), n-butyl acetate, toluene, isoamyl acetate, and isobutyl methyl ketone reported in the open literature. 15,16 The region of immiscibility for water + acetonitrile + solvent (butan-1-ol or methylpropan-1-ol) in this study is also significantly smaller than for other solvents with acetonitrile + water reported in the open literature except for methyl ethyl ketone. 15,16 ■ CONCLUSIONS Ternary LLE data for the water + acetonitrile + {butan-1-ol or 2-methylpropan-1-ol} systems at (303.2, 323.2, and 343.2) K and 1 atm were measured using the analytical method in a double-walled glass cell.…”

Section: ■ Results and Discussionmentioning

confidence: 55%

Ternary Liquid–Liquid Equilibrium Data for the Water + Acetonitrile + {Butan-1-ol or 2-Methylpropan-1-ol} Systems at (303.2, 323.2, 343.2) K and 1 atm

2014

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Ternary liquid–liquid equilibrium (LLE) data were measured and correlated for the water + acetonitrile + (butan-1-ol or 2-methylpropan-1-ol) systems at (303.2, 323.2, and 343.2) K and 1 atm. A double-walled glass cell with the direct analytical method was used to measure the liquid–liquid equilibrium data. The phase equilibrium samples were analyzed and quantified using gas chromatography. The nonrandom two-liquid activity coefficient model was used to fit the experimental tie-lines using nonlinear least-squares regression of the data. Relative selectivity values for solvent separation efficiency were calculated from the tie-line data. The plait point for each temperature was estimated with the graphical Coolidge method.

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Section: ■ Results and Discussionmentioning

confidence: 55%

Ternary Liquid–Liquid Equilibrium Data for the Water + Acetonitrile + {Butan-1-ol or 2-Methylpropan-1-ol} Systems at (303.2, 323.2, 343.2) K and 1 atm

2014

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“…However, the comparison between ACN and acetone shows that ACN exhibits a slightly faster mass transfer. The marginal difference can be explained by a slightly larger ACN mixing gap as the EFCE test system under otherwise comparable physical properties …”

Section: Resultsmentioning

confidence: 99%

Local analysis of Marangoni effects during and after droplet formation

Heine

Bart

2019

Can J Chem Eng

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The influence on the mass transfer in liquid-liquid extraction was investigated during droplet formation in a quiescent aqueous continuous phase for the two transition components, acetone and acetonitrile, in toluene. Both transition components have similar characteristics. However, an approximately eight times slower mass transfer of a droplet hanging on a capillary in relation to a rising droplet could be observed. The droplet formation time and the initial solute concentration are decisive for the mass transfer behaviour. A lower volumetric flow leads to slower droplet formation and a higher specific mass transfer area enhancing mass transfer, which is visualized via laser induced fluorescence (LIF). Additionally, as expected, higher initial solute concentrations promote Marangoni turbulences and thus mass transfer, which is measured via confocal Raman spectroscopy inside a fixed hanging droplet. K E Y W O R D S droplet formation, interfacial phenomena, Marangoni convection, mass transfer

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“…However, its separation/recovery from waste effluents is often difficult, as acetonitrile + water solution forms a minimum-boiling azeotrope with a composition of 82.2 mass % (67.4 mol %) acetonitrile at 76.5 °C and standard atmospheric pressure . Various separation methods such as extractive distillation, − azeotropic distillation, pressure-swing distillation, liquid–liquid extraction, , pervaporation, − and adsorption , have been reported to eliminate the acetonitrile + water azeotropic mixture to recover acetonitrile from its aqueous solution. Extractive distillation using solvents and salts was widely used for the separation of such mixtures.…”

Section: Introductionmentioning

confidence: 99%

Acetonitrile Dehydration via Extractive Distillation Using Low Transition Temperature Mixtures as Entrainers

et al. 2018

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Low transition temperature mixtures (LTTMs) are versatile alternatives to ILs. They share many properties with ILs, so they become a suitable choice for entrainers in extractive distillation processes. In this study, glycolic acid and choline chloride in a 3:1 molar ratio (GC3:1) were synthesized and explored as entrainers for separation of acetonitrile + water azeotropic mixtures. Isobaric vapor−liquid equilibrium data for the pseudobinary mixtures of ACN + GC3:1 and water + GC3:1 were measured at atmospheric pressure (101.32 kPa). For the pseudoternary system ACN + water + GC3:1, also VLE data were measured at different GC3:1 mole fractions of 0.05, 0.1, and 0.15. The thermodynamic modeling of these systems was performed using the nonrandom two-liquid (NRTL) model. Furthermore, a study was conducted for synthesized GC3:1 recoverability. A good agreement were found between experimental data and predicted values for these systems. Results showed that LTTM (GC3:1) eliminated the acetonitrile + water azeotrope by manipulating the relative volatility of the acetonitrile + water mixture. Therefore, LTTM (GC3:1) can be concluded as an efficient entrainer for the separation of an acetonitrile + water azeotropic mixture by extractive distillation.

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Extraction of acetonitrile from aqueous mixtures. 2. Ternary liquid equilibriums

Abstract: Ternary liquid equilibrium data at 30 ± 0.1 °C for the systems water-acetonitrile-toluene, water-acetonitrile-methyl Isobutyl ketone, water-acetonltrlle-lsoamyl acetate, water-acetonitrile-isoamyl alcohol, and water-acetonitrile-methyl ethyl ketone are obtained. The

Cited by 28 publications

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Ternary Liquid–Liquid Equilibrium Data for the Water + Acetonitrile + {Butan-1-ol or 2-Methylpropan-1-ol} Systems at (303.2, 323.2, 343.2) K and 1 atm

Ternary Liquid–Liquid Equilibrium Data for the Water + Acetonitrile + {Butan-1-ol or 2-Methylpropan-1-ol} Systems at (303.2, 323.2, 343.2) K and 1 atm

Local analysis of Marangoni effects during and after droplet formation

Acetonitrile Dehydration via Extractive Distillation Using Low Transition Temperature Mixtures as Entrainers

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