A new two-parameter equation for correlation and prediction of densities as a function of concentration and temperature in binary aqueous solutions

Apelblat, Alexander

doi:10.1016/j.molliq.2016.03.023

Cited by 18 publications

(10 citation statements)

References 304 publications

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“…The densities and isobaric expansibilities at 298.15 K of DES consisting of a salt hydrate and ice were obtained from the two-parameter expression: Here, ρ W ( T ) is the density of water at the temperature T ; w is the mass fraction of the (anhydrous) salt in the aqueous mixture, corresponding to the eutectic in the present context; and A and B are temperature-independent constants listed for the salts of interest and many others . The resulting quantities ρ(298.15 K, w e ), where w e is the mass fraction of the anhydrous salt at the eutectic composition are shown in Table for the salt hydrate–ice DES.…”

Section: Properties Of Salt Hydrate–ice Desmentioning

confidence: 72%

Unconventional Deep Eutectic Solvents: Aqueous Salt Hydrates

Marcus

2017

ACS Sustainable Chem. Eng.

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Neoteric solvents for sustainable chemical processes are continuously sought nowadays. Deep eutectic solvents (DES), i.e., liquids that are mixtures of two components that have freezing points considerably below the melting points of these components, constitute a possible solution for this search. Mixtures of certain congruently melting salt hydrates with water have freezing points considerably below the melting points of ice and of the salt hydrate. They should be considered as DES for applications in which their properties could be useful, namely their being “green” and nonflammable ionic liquids at very low temperatures. The eutectic points and eutectic temperature distances of such salt hydrate DES, calculated from literature data, are tabulated, and some illustrative phase diagrams are shown. Physical properties of the aqueous salt hydrate DES that are relevant to their possible applications are reported, and they compare favorably with those of conventional DES. The Brunauer–Emmett–Teller modeling procedure is applied to the case of the aqueous potassium fluoride tetrahydrate phase diagram.

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Section: Properties Of Salt Hydrate–ice Desmentioning

confidence: 72%

Unconventional Deep Eutectic Solvents: Aqueous Salt Hydrates

Marcus

2017

ACS Sustainable Chem. Eng.

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“…International Journal of Chemical Engineering function of temperature and concentration in binary aqueous solutions [45]. e equation is as follows:…”

Section: Resultsmentioning

confidence: 99%

Thermophysical Properties of 1-Octyl-3-Methylimidazolium Acetate with Organic Solvents

Yang

Feng

2020

International Journal of Chemical Engineering

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Ionic liquid (IL) usually possesses high viscosity. In this work, the selected organic solvents, namely, dimethyl sulfoxide, N,N-dimethylacetamide, and N,N-dimethylformamide, were used as the diluents to lower IL viscosity. The thermophysical properties of the densities and viscosities for the binary mixtures of IL (i.e., 1-octyl-3-methylimidazolium acetate) with solvents were studied at normal pressure in the temperature ranges of 303.15 K to 348.15 K. The effects of the organic solvents on lowering IL viscosity were quantitatively evaluated. The excess properties of the mixtures were calculated to analyze the interactions between IL and solvents. The hard-sphere model was employed to reproduce the viscosity behavior of the pure substances and binary mixtures.

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“…Refractive index is obtained. from [40] and the molar volume is calculated from Equation (2) using water density from [41]. It is considered that R ∞ j is temperature dependent and is represented by the following equation:…”

Section: Molar Refraction and Refractive Indexmentioning

confidence: 99%

“…where wj is the weight fraction of the solute j and ρ o j is the density of the binary solution of the solute j in water calculated at total solute weight fraction wj. ρ o j is estimated using the equation reported by Apelblat [41]:…”

Section: Molar Refraction and Refractive Indexmentioning

confidence: 99%

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Modeling of the Refractive Index for the Systems MX+H2O, M2X+H2O, H3BO3+MX+H2O, and H3BO3+M2X+H2O. M = K+, Na+, or Li+ and X = Cl− or SO42−

2021

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The modeling of the refractive index for binary aqueous solutions of boric acid, sodium chloride, potassium chloride, sodium sulfate, lithium sulfate, and potassium sulfate, as well as ternary aqueous solutions of boric acid in the presence of sodium sulfate, lithium sulfate, or potassium chloride, is reported. The refraction index was represented by molar refraction. It was described as the sum of solutes’ partial molar refraction and solvent molar refraction. The solutes’ partial molar refraction was estimated from the molar refraction of the binary solutions. The excess molar refraction for these systems was described with the equation of Wang et al. The polarizability of the solutes present in the studied systems was estimated using the Lorenz–Lorenz relation. The results showed the model is appropriate for describing the systems studied; the interactions of boric acid, sodium, potassium, lithium, chloride, and sulfate ions with water molecules are relevant to explain the molar refraction and refractive index, and those for the binary systems of lithium chloride and sodium chloride are also relevant the ion–ion interactions. The model is robust and presents estimation capabilities within and beyond the concentrations and temperature range studied. Therefore, the outcomes represent valuable information to understand and follow the industrial processing of natural brines.

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A new two-parameter equation for correlation and prediction of densities as a function of concentration and temperature in binary aqueous solutions

Cited by 18 publications

References 304 publications

Unconventional Deep Eutectic Solvents: Aqueous Salt Hydrates

Unconventional Deep Eutectic Solvents: Aqueous Salt Hydrates

Thermophysical Properties of 1-Octyl-3-Methylimidazolium Acetate with Organic Solvents

Modeling of the Refractive Index for the Systems MX+H2O, M2X+H2O, H3BO3+MX+H2O, and H3BO3+M2X+H2O. M = K+, Na+, or Li+ and X = Cl− or SO42−

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