Experimental data and thermodynamic modeling of ternary aqueous biphasic systems of EO/PO polymers–Na2SO4–H2O

Milošević, Maja M.; Staal, K.J.J.; Schuur, Boelo; Haan, A.B. de

doi:10.1016/j.fluid.2014.01.009

Cited by 8 publications

(6 citation statements)

References 52 publications

(68 reference statements)

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“…The binodal data of polymer–salt ATPSs was correlated by the third-order polynomial equation (eq ), and the equation analogue effect was good. Equation was widely used to fit the binodal curves of many ATPSs. ,,,− In this work, the experimental binodal data of three ATPSs were regressed and analyzed by computer and the fitting parameters a , b , c , and d of three euqations were given in Tables – , where the square of correlation coefficients ( R 2 ) and the corresponding standard deviations (sd) were also shown. It was found that eq has a higher goodness-of-fit than the other two equations by comparison of the correlation coefficients and standard deviations given in three tables.…”

Section: Resultsmentioning

confidence: 99%

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Yang

Sun

et al. 2018

J. Chem. Eng. Data

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The polymer polyoxyethylene(20) cetyl ether (C 56 H 114 O 21 , POELE20) and three salts (K 2 C 2 O 4 , K 2 C 4 H 4 O 6 , and K 3 C 6 H 5 O 7 ) were the phase-forming materials to build the aqueous two-phase system (ATPS) at the temperatures 288.15, 298.15, and 308.15 K. The data of the phase diagram including binodal curve data and tie-line data were determined and fitted by classical equations, and they obtained the satisfactory correlation effect. The phase-forming ability of salt composed of the same cation was investigated by three factors, namely, the valence of the anion, the Gibbs free energy of the anion, and the value of effective excluded volume (EEV). It was found that the phase-forming ability of salt strengthened when the values of said three factors went up. The results of the analysis on the data from the present work and that in our previous paper showed that the order of the phase-forming ability of salts was KOH

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Section: Resultsmentioning

confidence: 99%

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Yang

Sun

et al. 2018

J. Chem. Eng. Data

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“…The aqueous two-phase system (ATPS) is a new type of separation and enrichment technology governed by the mixing of two components in a water-based solution. It has shown great superiority to separation, purification, and recovery of metals, , antibiotics, dyes, and proteins. , The developed systems include two-polymer ATPS, polymer–salt ATPS, , ionic liquid–salt ATPS, , and micromolecule organic solvent–salt ATPS. , The ATPS containing polymer has high viscosity in the polymer phase. It is unfavorable for mass transfer and phase separation in the separation process.…”

Section: Introductionmentioning

confidence: 99%

“…It has shown great superiority to separation, purification, and recovery of metals, 1,2 antibiotics, 3 dyes, 4 and proteins. 5,6 The developed systems include two-polymer ATPS, 7 polymer−salt ATPS, 8,9 ionic liquid−salt ATPS, 10,11 and micromolecule organic solvent−salt ATPS. 12,13 The ATPS containing polymer has high viscosity in the polymer phase.…”

Section: Introductionmentioning

confidence: 99%

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na₂SO₄, and H₂O: Temperature-Dependent Equilibrium Data and Physical Properties

et al. 2017

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In this work, we have developed a novel aqueous twophase system (ATPS) composed of 1,4-bis(2-hydroxypropyl)piperazine (HPP), Na 2 SO 4 , and H 2 O, which can determine the liquid−liquid equilibrium and phase diagrams at the temperatures of 303.15−323.15 K. Simultaneously, the physical properties such as density, viscosity, refractive index, and surface tension have been determined for the top phases and bottom ones of the ATPS. The results indicate that temperature has no significant effect upon the biphasic region, implying a small enthalpy contribution during phase separation. However, the changes in temperature result in a decrease of tie line slope, because H 2 O molecules are transferred from the bottom phase to the top phase. In determining the physical properties of the system, viscosity and refraction index increase with the system components increasing, during the phase of both HPP and Na 2 SO 4 , while density and surface tension fall with the increase of system components in the top phase and decrease in the bottom one. ATPS would be a new method for removing the heat-stable salts (HSS) containing sulfuric acid root of absorbent for flue gas desulfurization, which is as HPP.

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“…ATPS has rapidly developed after this term was firstly mentioned by Beijerinck in 1896 [1]. To date, the many examples of ATPS can be classified into following categories based on the ingredients: the traditional types, i.e., polymer-based [2][3][4][5][6][7] and surfactant-based ATPS [8,9], and novel types like ionic liquid-based [10][11][12][13][14][15] and organic solvent-based ATPS [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and pH on phase behavior for the ternary systems of water + inorganic salt + alkoxyethanols at atmospheric pressure

Wang

et al. 2016

Journal of Molecular Liquids

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The effects of temperature, pH, inorganic salts, as well as molecular structure on the phase behavior of water + salt + alkoxyethanol(CnEm, n = 2-4, m = 1-3) ternary systems were investigated. Binodal data for water + NaCl + C2E1, C3E1, C4E1, C4E2, C4E3 were obtained and correlated to investigate how the system's phase-split ability is influenced by the type of alkoxyethanol. In addition, the binodal data for aqueous solution of C4E1 with NaCl, KCl, CsCl, NaF, NaBr were investigated to understand the effects of the salts. Furthermore, the complete two-liquid-phase coexistence regions for water + NaCl + C4E1 at T = (283.15, 293.15, 303.15, 313.15) K were acquired to investigate the effects of temperature. The liquid-liquid equilibria (LLE) were also studied based on tie-line data, in which three correlation equations, the Othmer-Tobias equation, the Bancroft equation and the Setschenow equation were used. Finally, the binodal data of water + NaCl + C4E1 was measured at pH = (3, 5, 7, 9, 11) to investigate the impact of pH.

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Experimental data and thermodynamic modeling of ternary aqueous biphasic systems of EO/PO polymers–Na2SO4–H2O

Cited by 8 publications

References 52 publications

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na₂SO₄, and H₂O: Temperature-Dependent Equilibrium Data and Physical Properties

Effects of temperature and pH on phase behavior for the ternary systems of water + inorganic salt + alkoxyethanols at atmospheric pressure

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Experimental data and thermodynamic modeling of ternary aqueous biphasic systems of EO/PO polymers–Na2SO4–H2O

Cited by 8 publications

References 52 publications

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na2SO4, and H2O: Temperature-Dependent Equilibrium Data and Physical Properties

Effects of temperature and pH on phase behavior for the ternary systems of water + inorganic salt + alkoxyethanols at atmospheric pressure

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Novel Aqueous Two-Phase System Consisting of 1,4-Bis(2-hydroxypropyl)-piperazine, Na₂SO₄, and H₂O: Temperature-Dependent Equilibrium Data and Physical Properties