Liquid-liquid-solid equilibria of the quaternary system water-ethanol-1-butanol-soldium chloride at 25°C

Marcilla, A.; Ruíz, Francisco; Olaya, Marı́a del Mar

doi:10.1016/0378-3812(94)02595-r

Cited by 27 publications

(33 citation statements)

References 8 publications

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“…To understand the relative performance of DME, we characterized the aqueous phase of the liquid-liquid equilibria of twelve water-NaCl-MOS ternary mixtures, and compared the results to existing data available in the literature. [20][21][22] The measurements presented provide key insights into the mechanism of MOSdriven FP, which have implications for fundamental electrolyte solvation phenomena.…”

Section: Introductionmentioning

confidence: 95%

“…Surprisingly, very few experimentally determined phase diagrams exist for watersalt-MOS systems. [20][21][22][60][61][62][63][64][65][66] To close the knowledge gaps associated with ternary phase behavior of water-NaCl-MOS systems for FP, we have experimentally obtained the aqueous phase boundaries for twelve different MOSs, expanding on four relevant datasets that we found in the literature. [20][21][22] Based on these data, we have developed a conceptual model for the mechanism of MOS-driven FP.…”

Section: Introductionmentioning

confidence: 99%

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Solute displacement in the aqueous phase of water–NaCl–organic ternary mixtures relevant to solvent-driven water treatment

et al. 2020

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Solute displacement in the aqueous phase of water–NaCl–organic ternary mixtures relevant to solvent-driven water treatment

et al. 2020

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“…The complete set of parameters of COSMO‐RS‐ES was determined based on a large set of mean ionic coefficient (1465 data points) and LLE data (1071 data points) that was collected from various references . An overview on the data set is presented in Tables S1 and S2 in the Supporting Information.…”

Section: Computational Detailsmentioning

confidence: 99%

Development of a COSMO‐RS based model for the calculation of phase equilibria in electrolyte systems

2017

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A new electrolyte model, which is based on the predictive thermodynamic model COSMO-RS, is presented. For this purpose, an implementation of COSMO-RS that allows the integration of multiple segment descriptors was developed. To aid in the development of the electrolyte model, a new technique is presented that allows the evaluation of the different contributions of the interaction terms of COSMO-RS to the partial molar enthalpies. General empirical interaction energy equations are introduced into the electrolyte model. They are parameterized based on a large training set of mean ionic activity coefficients as well as liquid-liquid equilibrium data close to ambient conditions. The model is shown to be capable of predicting properties of systems containing anions that were not part of the training set of the model. Furthermore, it is demonstrated that the model can also lead to satisfying predictions if compared to vaporliquid equilibrium data.

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“…Thus, at 25 0 C the solubility of 1-butanol is 7.41 % (wt) [37], 7.29 % (wt) [38], or according to data obtained by Stephenson [39] at 20.0 0 C it is 8.03 % (wt) or at 30.8 0 C it is 7.07 % (wt). The solubility of 1-butanol decreases with temperature rise up to 60 0 C. When the solution is saturated by NaCl (of about 26 % (wt) NaCl), the solubility of 1-butanol is 0.59 -0.7 % (wt) [37,38,40]. In 3.1 % (wt) NaCl solution 1-butanol solubility is 5.43 % (wt) [38].…”

Section: Dls Measurementsmentioning

confidence: 65%

Influence of the Ionic and Non-Ionic Additives on the Acid Strength of Neutral Red in the Aqueous Solutions of Poly (Sodium 4-Styrenesulfonate)

Moskaeva¹

2017

Chemical

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Polyions of poly (sodium 4-styrenesulfonate) in aqueous solution may be considered as colloidal pseudophase. Analogously to micelles, some species can be bind by the charged polyelectrolyte coils. In this paper, the colored acid-base indicator dyes were used for studying the penetration of ionic and non-ionic solution components in polyelectrolyte coils. Such analysis relies on alteration of the acid strength of dyes. The aim of this work was to determine the dependences of the apparent ionization constants of neutral red, app a K , on the ionic strength of solution, I, in different mixed systems containing poly (sodium 4-styrenesulfonate) (NaPSS) and tetraethylammonium bromide, tetra-n-butylammonium iodide, or 1-butanol with NaCl. Neutral red is fixed in the polyelectrolyte coils due to electrostatic and hydrophobic interactions. The polyelectrolyte : dye concentration ratio, P : D, an important parameter for spectophotometrical measurements, equals 100. It was found that tetra-n-alkylammonium salts display a stronger influence on the acid strength of neutral red as compared with that of NaCl. For instance, in the case of tetraethylammonium bromide app a pK = 7.90 ± 0.07 at I = 0.02 M whereas app a pK = 8.45 ± 0.04 with NaCl at the same ionic strength. It can be explained by specifical adsorption tetra-n-alkylammonium cations on polyions 'surface'. Introduction of 1-butanol significantly increases the acid strength of neutral red too, however its influence isn't monotonic with change of ionic strength. The dependences of app a pK on log I were discussed in terms of regularities which are well-known for surfactant micellar systems. All mentioned systems were also examined by dynamic light scattering measurements using Zetasizer Nano ZS Malvern Instruments apparatus. As it turned out, when the ionic strength is 3×10 -3 М or more the size (by number) of polyions in the presence of NaCl is of about 7 nm. Introduction of the additives results in somewhat higher size: in the case of 1-butanol the size of NaPSS is 10 nm.

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Liquid-liquid-solid equilibria of the quaternary system water-ethanol-1-butanol-soldium chloride at 25°C

Cited by 27 publications

References 8 publications

Solute displacement in the aqueous phase of water–NaCl–organic ternary mixtures relevant to solvent-driven water treatment

Solute displacement in the aqueous phase of water–NaCl–organic ternary mixtures relevant to solvent-driven water treatment

Development of a COSMO‐RS based model for the calculation of phase equilibria in electrolyte systems

Influence of the Ionic and Non-Ionic Additives on the Acid Strength of Neutral Red in the Aqueous Solutions of Poly (Sodium 4-Styrenesulfonate)

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