Effect of temperature on the phase-separation ability of KCl in aqueous two-phase systems composed of propanols: Determination of the critical temperature and extension of the results to other salts

Garcia-Cano, Jorge; Gomis, Alejandro; Font, Alicia; Gomis, Vicente

doi:10.1016/j.jct.2019.04.016

Cited by 7 publications

(11 citation statements)

References 37 publications

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“…The corresponding experimental data . 31 In both cases, only small differences can be observed between the figures (experimental and calculated), but the shape of the curves is practically the same. Generally, SLE calculations performed with the model are very accurate too, as seen in Table 4.…”

Section: ■ Results and Discussionmentioning

confidence: 76%

“…Figures 4 and 5 show two examples of the systems, and they can be compared with the experimental ones [Garcia-Cano et al (2018) 30 and Garcia-Cano et al (2019). 31 In Figure 4a, calculated vapor phase isoconcentration curves for 1-propanol in the vapor phase for the system water + NaCl + 1-propanol at 1.013 bar calculated with the extended UNIQUAC model are displayed. The corresponding experimental data .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Extended UNIQUAC Thermodynamic Modeling of Aqueous Two-Phase Systems, Water + Salt + Short-Chain Alcohol

Gomis

Fosbøl

Thomsen

2022

Ind. Eng. Chem. Res.

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The extended UNIQUAC activity coefficient model for electrolyte solutions was used for simulating the water + shortchain alcohol (1-propanol, 2-propanol, and tert-butanol) + salt (NaCl, KCl, NH 4 Cl, Na 2 SO 4 , and K 2 SO 4 ) systems in a wide temperature range (0−100 °C). Experimental data were used for determining the interaction parameters (water + alcohol and alcohol + ion) and the volume and surface area parameters. Parameters for water + ion interactions were taken from previous publications. Equilibrium calculations including SLLV, SLL, SLV, LLV, LV, SV, and SL were performed with the model. The results are largely in agreement with those obtained experimentally. Model parameters previously published for these systems were revised based on new data.

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Section: ■ Results and Discussionmentioning

confidence: 76%

Section: ■ Results and Discussionmentioning

confidence: 99%

Extended UNIQUAC Thermodynamic Modeling of Aqueous Two-Phase Systems, Water + Salt + Short-Chain Alcohol

Gomis

Fosbøl

Thomsen

2022

Ind. Eng. Chem. Res.

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“…Their SLL equilibrium data at 353.15 K are represented in Figure 2. Mills and Smith [16] also determined liquid-liquid equilibrium data for the system with 2-propanol at 313.15 and 333.15 K. As in the systems with K2SO4, the temperatures used in the present work are higher than those but follow the trends of the previous data within the uncertainty of the measurements as can be seen in Figure . In previous works, the equilibrium diagrams of water + NaCl/KCl/NH4Cl + 1-propanol or 2propanol systems [7][8][9][10][11] were determined at boiling temperatures and 101.3 kPa. All these systems, where monovalent salts were involved, showed liquid-liquid phase splitting at the boiling point and even at lower temperatures, giving rise to ATPSs.…”

Section: Resultsmentioning

confidence: 99%

“…In previous works, the solid-liquid-liquid-vapor (SLLV) equilibrium diagrams of mixtures of water and 1-propanol or 2-propanol with different monovalent salts such as NaCl [7][8], KCl [9] or NH4Cl [10][11] have been studied under boiling conditions at 101.3 kPa. The objective of this work is to study the SLLV equilibrium of water + salt + alcohol systems where the considered salts are divalent.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium diagram of the water + K2SO4 or Na2SO4 + 1-propanol or 2-propanol systems at boiling conditions and 101.3 kPa

Gomis

Garcia-Cano

Asensi

et al. 2020

Fluid Phase Equilibria

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 Experimental determinations at 101.3 kPa of the solid-liquid-liquid-vapor, liquid-liquidvapor, solid-liquid-vapor and liquid-vapor equilibrium for the water + Na2SO4 + 1propanol and 2-propanol ternary systems. Experimental determinations at 101.3 kPa of the solid-liquid-vapor and liquid-vapor equilibrium for the water + K2SO4 + 1-propanol and 2-propanol ternary systems.  Experimental data prediction with UNIQUAC using AQSOL software.

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“…Temperature affected the hydrophilicity and hydrophobicity of the PN and the phase behavior of ATPS [33]. In this study, the influence of temperature on the partition of tea saponin in the PN/PADB4.78 ATPS was investigated and the range of temperature was from 15°C to 30°C at optimized pH.…”

Section: Effect Of Temperaturementioning

confidence: 99%

Partition of Tea Saponin with a Novel Recyclable Thermo-pH Aqueous Two-Phase Systems

Wei

Chen

Yang

et al. 2021

Appl Biochem Biotechnol

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Aqueous two-phase systems (ATPS) have the advantages of environmentally friendly, high mass transfer efficiency, mild extraction conditions. However, it is difficult to recycle these components, which limits the large-scale application of ATPS in industrial production. In this study, a novel recyclable ATPS of PN/PADB4.78 was constructed with a thermo-responsive polymer PN and a pH-responsive polymer PADB4.78 for the partition study of tea saponin. The recovery of PN reached 98.71% by adjusting the temperature to above its lower critical solution temperature (LCST, 33.0 °C ) and the recovery of PADB4.78 was 97.32% by regulating the pH to its isoelectric point (pI, 4.78). Meanwhile, the phase formation mechanism of ATPS was studied by surface tension and low-field nuclear magnetic resonance (LF-NMR). The effects of polymer concentration, pH, temperature, types and concentrations of salt were investigated on tea saponin partition.In the 1.5% PN/3.5% PADB4.78 ATPS, the optimal partition coefficient (K) and extraction recovery (ERb) of crude tea saponin were 0.15 and 92.13% in the presence of 1.5 mM KCl at pH=7.6 and 25℃, respectively. The K and ERb of tea saponin from tea seeds were 0.12 and 94.50% with 7.5 mM LiBr at pH=8.0 and 25℃, respectively.

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Effect of temperature on the phase-separation ability of KCl in aqueous two-phase systems composed of propanols: Determination of the critical temperature and extension of the results to other salts

Abstract: Effect of temperature on the phase-separation ability of KCl in aqueous two-phase systems composed of propanols: Determination of the critical temperature and extension of the results to other salts,

Cited by 7 publications

References 37 publications

Extended UNIQUAC Thermodynamic Modeling of Aqueous Two-Phase Systems, Water + Salt + Short-Chain Alcohol

Extended UNIQUAC Thermodynamic Modeling of Aqueous Two-Phase Systems, Water + Salt + Short-Chain Alcohol

Equilibrium diagram of the water + K2SO4 or Na2SO4 + 1-propanol or 2-propanol systems at boiling conditions and 101.3 kPa

Partition of Tea Saponin with a Novel Recyclable Thermo-pH Aqueous Two-Phase Systems

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