Isopiestic Determination of the Osmotic Coefficients and Pitzer Model Representation for the Li2B4O7+LiCl + H2O System at T=298.15 K

Yang, Ji-Min; Yao, Yan; Xia, Qiying; Li, Baohui; Xu, Shuyong; Yang, Jie

doi:10.1007/s10953-007-9244-0

Cited by 10 publications

(10 citation statements)

References 17 publications

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“…Therefore, the molalities (m) for LiCl and Li 2 B 4 O 5 (OH) 4 were corrected from those in the literature. 25 The maximum and average deviation between calculated and experimental results is 0.0079 and 0.0008, respectively. The results show that this set of parameters obtained from solubilities are credible and capable for water activity calculations.…”

Section: Resultsmentioning

confidence: 90%

“…23,24 The Pitzer binary parameters for Na 2 B 4 O 5 (OH) 4 and Pitzer mixing 7 The parameters obtained are listed in Tables 5 and 6 The water activities (a w ) in the system LiCl−Li 2 B 4 O 7 −H 2 O at 298.15 K were reported in the literature. 25 To validate this set of parameters for this system LiCl−Li 2 B 4 O 7 −H 2 O, the water activities were calculated with the parameters fitted with solubilities in the ternary system. The calculated a w and experimental a w are listed in Table 7.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M₂B₄O₇–H₂O (M = Li, Na) Systems

Yang

Meng

et al. 2019

J. Chem. Eng. Data

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The solubilities in the MCl–M2B4O7–H2O (M = Li, Na) systems at 323.15 K were studied with the isothermal solid–liquid equilibrium method. Both the phase diagrams in the above systems belong to the simple eutectic type. Combining the Pitzer binary parameters of LiCl and NaCl obtained from the literatures, the lacking Pitzer binary parameters of Li2B4O5(OH)4 and Na2B4O5(OH)4, Pitzer mixing parameters θCl–,B4O5(OH)4 2– , ψLi+,Cl–,B4O5(OH)4 2– , and ψNa+,Cl–,B4O5(OH)4 2– , and the solubility product constants of Li2B4O5(OH)4·H2O and Na2B4O5(OH)4·8H2O at 298.15 and 323.15 K were fitted with the experimental solubility data by the Pitzer model. The agreement between the experimental water activities and calculated results with parameters fitted with solubilities in the system LiCl–Li2B4O7–H2O at 298.15 K shows that the parameters fitted with solubilities are reliable. The comparison between the experimental and calculated solubilities of the two systems at 298.15 and 323.15 K shows that calculated solubility data are in agreement with 0.03 of experimental results in the two systems.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M₂B₄O₇–H₂O (M = Li, Na) Systems

Yang

Meng

et al. 2019

J. Chem. Eng. Data

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“…However, the separate certain concentrations of B 4 O 7 2– and B 6 O 10 2– are difficult to determine by present analytical techniques. Therefore, on the basis of the statistical principle of group contribution, the concentration of the total borates in aqueous solution was expressed in B 4 O 7 2– , which is also the most frequently expressed form in the literature at present . The concentration of Ca 2+ ion was analyzed by titration with an EDTA standard solution in alkali medium with a Ca-indicator, with an uncertainty of ±0.003 in mass fraction .…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, on the basis of the statistical principle of group contribution, the concentration of the total borates in aqueous solution was expressed in B 4 O 7 2− , which is also the most frequently expressed form in the literature at present. 17 The concentration of Ca 2+ ion was analyzed by titration with an EDTA standard solution in alkali medium with a Ca-indicator, with an uncertainty of ±0.003 in mass fraction. 15 The Na + ion was evaluated using ion balance combined with analytical verification using inductively coupled plasma−optical emission spectrometry (Prodigy, Leman Co., United States) with standard uncertainty of ±0.005 in mass fraction.…”

Section: Methodsmentioning

confidence: 99%

Phase Equilibria of the Reciprocal Quaternary System (Na⁺, Ca²⁺//Cl^–, Borate–H₂O) at 288.15 K and 0.1 MPa

et al. 2018

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To exploit the valuable features of brine resources with high concentrations of borate ions, the solubility data and corresponding physicochemical properties (refractive index, density, viscosity, and pH) for the reciprocal quaternary system (Na + , Ca 2+ //Cl − , borate−H 2 O) at 288.15 K were determined experimentally using the method of isothermal dissolution equilibrium. The dry-salt and water-phase diagrams and the diagrams of physicochemical properties (refractive index, density, viscosity, and pH) against J(B 4 O 7 2− ) in the solution were established. In the dry-salt phase diagram of the quaternary system at 288.15 K, two invariant points, five univariant curves, and four crystallization regions corresponding to gowerite (CaB 6 O 10, and sodium chloride (NaCl) were found. The area of crystallization region of CaB 6 O 10 •5H 2 O is larger than that of other coexisting salts, which indicates that the solubility of gowerite in this system is the lowest and that it is more easily separated by crystallization; the areas of crystallization regions of Na 2 B 4 O 7 • 10H 2 O, NaCl, and CaCl 2 •6H 2 O are decreased in turn. In this system, there are no double salts or solid solutions experimentally found. The water-phase diagram of the system indicates regular variation of J(H 2 O) on J(B 4 O 7 2− ), and the physicochemical properties of the quaternary system varied regularly with increasing Janecke index values of J(B 4 O 7 2− ).

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“…The predicted solubilities for this system using Pitzer's approach showed good agreement with experimental results. Yang et al [106] measured isopiestic molalities and water activities for the Li 2 B 4 O 7 -LiCl-H 2 O system at 298.15 K using an improved isopiestic apparatus, and the two types of osmotic coefficients were calculated and compared. Pitzer's primary model with minor modifications, in combination with the chemical equilibria, was used to represent the experimental data for the complex Li 2 B 4 O 7 -LiCl-H 2 O system.…”

Section: Thermodynamics Of Lithium Salts and Their Aqueous Solution Smentioning

confidence: 99%

Phase Equilibria and Phase Separation of the Aqueous Solution System Containing Lithium Ions

Li¹,

Guo²,

Deng³

2017

Desalination

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Brines including seawater, concentrated seawater after desalinization, salt lake, oil/gas water, and well bitter are widely distributed around the world. In order to promote the comprehensive utilization and effective protection of the valuable chemical resources existing in brines such as freshwater, lithium, sodium, potassium, and magnesium salts, the systematic foundation and application foundation research including phase equilibria and thermodynamic properties for the salt-water electrolyte solution are essential, especially for solid lithium salts and their aqueous solution systems.

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Isopiestic Determination of the Osmotic Coefficients and Pitzer Model Representation for the Li2B4O7+LiCl + H2O System at T=298.15 K

Cited by 10 publications

References 17 publications

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M₂B₄O₇–H₂O (M = Li, Na) Systems

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M₂B₄O₇–H₂O (M = Li, Na) Systems

Phase Equilibria of the Reciprocal Quaternary System (Na⁺, Ca²⁺//Cl^–, Borate–H₂O) at 288.15 K and 0.1 MPa

Phase Equilibria and Phase Separation of the Aqueous Solution System Containing Lithium Ions

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Isopiestic Determination of the Osmotic Coefficients and Pitzer Model Representation for the Li2B4O7+LiCl + H2O System at T=298.15 K

Cited by 10 publications

References 17 publications

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M2B4O7–H2O (M = Li, Na) Systems

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M2B4O7–H2O (M = Li, Na) Systems

Phase Equilibria of the Reciprocal Quaternary System (Na+, Ca2+//Cl–, Borate–H2O) at 288.15 K and 0.1 MPa

Phase Equilibria and Phase Separation of the Aqueous Solution System Containing Lithium Ions

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Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M₂B₄O₇–H₂O (M = Li, Na) Systems

Solubility Measurement and Thermodynamic Modeling of Solid–Liquid Equilibria in the MCl–M₂B₄O₇–H₂O (M = Li, Na) Systems

Phase Equilibria of the Reciprocal Quaternary System (Na⁺, Ca²⁺//Cl^–, Borate–H₂O) at 288.15 K and 0.1 MPa