Solubilities of Salts in Dioxane--Water Solvents

Davis, Thomas W.; Ricci, John E.; Sauter, Christina

doi:10.1021/ja01267a011

Cited by 22 publications

(13 citation statements)

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“…Figs. [6][7][8][9][10][11]17, and 18 testify that our approach is valid up to x gas = 0.15 at low temperatures (T < 100°C) and up to x gas = 0.30 at higher temperatures (T > 300°C). Such an extension of the approach appli-K log cability accords with the idea on the prevalence of electrostatic interactions at high temperatures (Ryzhenko, 1981;Helgeson et al, 1981).…”

Section: Inaccuracies and Constraintsmentioning

confidence: 96%

“…(13)-(16)), and its activity ratio, on Eq. (17). As was mentioned above, such an approach ensures a greater accuracy in describing neutral aqueous components under supercritical conditions than the standard method accepted in the HKF model (Shock et al, 1989).…”

Section: Calcite (Caco 3 Cr ) Solubilitymentioning

confidence: 99%

“…The Redlich-Kwong equation of state allows calculation of the activity coefficient of the component i in the mixture γ i at T (K), P (bar), and x i (Akinfiev, 1997): (17) where the index-free parameters correspond to the mixture, b i is the excluded volume of the pure component i, and a j is the mixed parameter of intermolecular interaction (Eq. (14c)).…”

Section: Calculation Of Activity Coefficientsmentioning

confidence: 99%

“…Experimental data (Davis et al, 1939) on the solubility of crystalline Ag 2 SO 4 in the mixed fluid H 2 O-1,4-dioxane at 25°C were processed according to the method proposed above. Only ions Ag + and S were taken into consideration, and their thermodynamic data were borrowed from SUPCRT92.…”

Section: Ag 2 So 4 -O-h Systemmentioning

confidence: 99%

“…17 Fein and Walther (1987) and seem to be overvalued. The appearance of a maximum of calcite solubility with an isothermic growth of is determined by the effect of two opposite factors.…”

Section: Calcite (Caco 3 Cr ) Solubilitymentioning

confidence: 99%

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Thermodynamic description of equilibria in mixed fluids (H2O-nonpolar gas) in a wide range of temperatures (25–700°C) and pressures (1–5000 bar)

Akinfiev

Зотов

2006

Geol. Ore Deposits

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to the presence of solute nonpolar gas may result in a cardinal change in components of the solution and a decrease in mineral solubility by orders of magnitude.Thermodynamic description of mixed fluids such as H 2 O-nonpolar gas at high temperatures and pressures is a challenging problem. Obviously, consideration of the equilibria of individual reactions is insufficient for describing the equilibrium in the system as a whole. The purpose of this work is to propose a general method allowing the study of equilibria in multi-systems over mixed fluid. The method uses the HelgesonKirkham-Flowers (HKF) electrostatic equation of state for aqueous components (Tanger and Helgeson, 1988) and can be regarded as an extension of this equation to the case of mixed fluids H 2 O-volatile. The extensive thermodynamic database SUPCRT98 , used along with the Gibbs universal minimization program BALANCE (Akinfiev, 1986(Akinfiev, , 1993, permits not only consideration of individual reactions but also study of equilibria in such hydrothermal systems as a whole. KEY RELATIONSHIPSTo predict the behavior of components in a solution at high temperatures and pressures, so-called electroAbstract -A new method is proposed for calculating equilibria in mixed multicomponent systems H 2 O-nonpolar gas at high temperatures and pressures. The method is based on calculation of electrostatic interactions between a solute component and surrounding molecules of a solvent ( H 2 O ). The SUPCRT98 database and the Helgeson-Kirkham-Flowers equation of state for components of an aqueous solution were used for computer realization of the method. The thermodynamic properties of solute gases at elevated temperatures and pressures are calculated by the Redlich-Kwong equation. The dielectric properties of a mixed solvent are determined using the modified Kirkwood equation. The proposed method was approved in description of the available set of experimental data on constants of H 2 O and NaCl dissociation, as well as data on solubility of both covalent and ionic crystals [ SiO 2 , AgCl, Ag 2 SO 4 , Ca(OH) 2 , CaCO 3 ] in mixed solvents H 2 O-nonpolar component [1,4-dioxane ( C 4 H 4 O 2 ), Ar, CO 2 ]. The calculation and experimental data agree in a wide range of PTx conditions (temperatures up to 500°C , pressures up to 5000 bar, and mole fractions ( x ) of a nonpolar component in fluid up to 0.3).The proposed approach can be used for assessing the Born parameters of solute components. The calculation algorithm developed allows us not only to consider separate reactions but also to study equilibria in hydrothermal systems as a whole. Hence, the proposed approach can be used for constructing thermodynamic models of evolution of fluids rich in volatile components and vital to natural processes of mineral formation.

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Section: Inaccuracies and Constraintsmentioning

confidence: 96%

Section: Calcite (Caco 3 Cr ) Solubilitymentioning

confidence: 99%

Section: Calculation Of Activity Coefficientsmentioning

confidence: 99%

Section: Ag 2 So 4 -O-h Systemmentioning

confidence: 99%

“…17 Fein and Walther (1987) and seem to be overvalued. The appearance of a maximum of calcite solubility with an isothermic growth of is determined by the effect of two opposite factors.…”

Section: Calcite (Caco 3 Cr ) Solubilitymentioning

confidence: 99%

See 3 more Smart Citations

Thermodynamic description of equilibria in mixed fluids (H2O-nonpolar gas) in a wide range of temperatures (25–700°C) and pressures (1–5000 bar)

Akinfiev

Зотов

2006

Geol. Ore Deposits

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The Solubility of Electrolytes in Homogeneous Mixtures of Water‐Miscible Organic Solvent (MOS)

Alfassi

Weiß

1983

Ber Bunsenges Phys Chem

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The solubility of several electrolytes in homogeneous mixtures of water‐miscible organic solvent (acetone, methanol, tetrahydrofuran, dioxane and acetonitrile) was found to obey the equation S = Sw exp (‐ λf) where Sw and S are the solubilities in water and the mixture respectively, and f is the volume fraction (or mole fraction) of the organic solvent. This dependence can be explained assuming the additivity of the standard state chemical potential of the electrolyte in the mixture, i.e. μ mixture0 = f · μ solvent10 + (1 ‐ f) μ solvent 20.

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Solubility of Sodium Salicylate in Mixed Solvent Systems

Paruta

Mauger

1971

Journal of Pharmaceutical Sciences

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Solubilities of Salts in Dioxane--Water Solvents

Cited by 22 publications

References 1 publication

Thermodynamic description of equilibria in mixed fluids (H2O-nonpolar gas) in a wide range of temperatures (25–700°C) and pressures (1–5000 bar)

Thermodynamic description of equilibria in mixed fluids (H2O-nonpolar gas) in a wide range of temperatures (25–700°C) and pressures (1–5000 bar)

The Solubility of Electrolytes in Homogeneous Mixtures of Water‐Miscible Organic Solvent (MOS)

Solubility of Sodium Salicylate in Mixed Solvent Systems

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