Activities of water, polymer and salt in liquid–liquid equilibria of polyvinylpyrrolidone and (NH4)2HPO4/(NH4)H2PO4 buffer using the Flory–Huggins model with Debye–Huckel and Pitzer–Debye–Huckel equations and the Osmotic virial model: Effects of pH and temperature

Foroutan, Masumeh; Zarrabi, Mona

doi:10.1016/j.fluid.2008.01.025

Cited by 10 publications

(2 citation statements)

References 24 publications

(24 reference statements)

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“…Zafarani-Moattar and co-workers − have reported the liquid–liquid equilibrium (LLE) data of PVP (K12) + K 3 PO 4 , K 2 HPO 4 , and NaH 2 PO 4 + H 2 O and PVP (K15) + Na 3 PO 4 , Na 2 HPO 4 , K 2 C 4 H 4 O 6 , and K 2 C 2 O 4 + H 2 O ATPS's. Other systems like PVP (K15) + K 3 C 6 H 5 O 7 , NaCO 3 , Na 2 SO 4 , Na 2 C 2 O 4 , and MgSO 4 + H 2 O, PVP (K15) + K 2 HPO 4 , KH 2 PO 4 , (NH 4 ) 2 HPO 4 , and (NH 4 )H 2 PO 4 + H 2 O, and PVP (K17, K30, and K90) + Na 2 SO 4 + H 2 O have also been published in previous papers. − …”

Section: Introductionmentioning

confidence: 97%

Liquid–Liquid Equilibria of Polyvinylpyrrolidone + Several Ammonium Salts + Water Aqueous Two-Phase Systems: Experimental and Correlation

Wang

et al. 2012

J. Chem. Eng. Data

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Phase equilibrium behaviors of polyvinylpyrrolidone (PVP) + (NH 4 ) 2 HPO 4 , (NH 4 ) 2 SO 4 , (NH 4 ) 2 CO 3 , (NH 4 ) 2 C 4 H 4 O 6 , and (NH 4 ) 2 HC 6 H 5 O 7 + H 2 O aqueous two-phase systems (ATPS's) were determined at 298.15 K. A series of common phase-forming ammonium salts and the corresponding anions were discussed. Meanwhile, the temperature effect on phase equilibrium behavior for PVP (K30) + (NH 4 ) 2 HPO 4 + H 2 O ATPS was investigated at (288.15, 298.15, and 308.15) K. It was found that phase-forming abilities of the salts are in the order: (NH 4 ) 2 HPO 4 > (NH 4 ) 2 SO 4 > (NH 4 ) 2 C 4 H 4 O 6 > (NH 4 ) 2 HC 6 H 5 O 7 > (NH 4 ) 2 CO 3 . Furthermore, a third-order polynomial equation was used to correlate the binodal data, while a simple two-parameter equation along with the Othmer−Tobias and Bancroft equations was used to correlate the tie-lines data. All equations used above were proved to be valid for the experimental data. At last, the data of critical points were obtained by an extrapolation method.

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Section: Introductionmentioning

confidence: 97%

Liquid–Liquid Equilibria of Polyvinylpyrrolidone + Several Ammonium Salts + Water Aqueous Two-Phase Systems: Experimental and Correlation

Wang

et al. 2012

J. Chem. Eng. Data

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“…In the present work, it is shown that the phase behavior of surfactant−salt ATPS can be described accurately with the osmotic virial model and the Flory−Huggins model with the Debye−Huckel equation with temperature-dependent interaction parameters. These models extensively have been used for determination of liquid−liquid equilibrium (LLE) behavior of various systems. − In addition, the effect of salt type on the LLE of these systems is studied.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Phase Equilibrium for Aqueous Solutions of Brij 58 Surfactant and Three Salts

Foroutan

Mohammadlou²

2008

Ind. Eng. Chem. Res.

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The osmotic virial model and the Flory-Huggins model, with the Debye-Huckel equation as an electrostatic term, have been used to correlate the liquid-liquid equilibrium data for an aqueous solution of polyoxyethylene cetyl ether surfactant (abbreviated as Brij 58) and three inorganic salts (containing NH 4 H 2 PO 4 , (NH 4 ) 2 HPO 4 , and Brij58-KH 2 PO 4 ) at 298.15 K. The results have shown that the maximum absolute deviation from experimental data is less than 0.6% and 1.4% for the osmotic virial model and the Flory-Huggins theory, respectively. These models are in good agreement with experimental data.

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Liquid-liquid equilibrium and physical properties of aqueous mixtures of poly(vinyl pyrrolidone) with potassium phosphate at different pH: Experiments and modeling

Rahmani

Rostami

Pirdashti

et al. 2017

Korean J. Chem. Eng.

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Activities of water, polymer and salt in liquid–liquid equilibria of polyvinylpyrrolidone and (NH4)2HPO4/(NH4)H2PO4 buffer using the Flory–Huggins model with Debye–Huckel and Pitzer–Debye–Huckel equations and the Osmotic virial model: Effects of pH and temperature

Cited by 10 publications

References 24 publications

Liquid–Liquid Equilibria of Polyvinylpyrrolidone + Several Ammonium Salts + Water Aqueous Two-Phase Systems: Experimental and Correlation

Liquid–Liquid Equilibria of Polyvinylpyrrolidone + Several Ammonium Salts + Water Aqueous Two-Phase Systems: Experimental and Correlation

Modeling of the Phase Equilibrium for Aqueous Solutions of Brij 58 Surfactant and Three Salts

Liquid-liquid equilibrium and physical properties of aqueous mixtures of poly(vinyl pyrrolidone) with potassium phosphate at different pH: Experiments and modeling

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