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Tianlong Deng - One of the best experts on this subject based on the ideXlab platform.
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Solubilities, Densities and Refractive Indices in the Aqueous Quaternary System of Lithium Sulfate, Lithium Metaborate, and Lithium Carbonate at 288.15, 298.15, 308.15 K and 0.1 MPa
Journal of Chemical & Engineering Data, 2016Co-Authors: Yafei Guo, Shiqiang Wang, Lina Cao, Tianlong DengAbstract:Solubilities, densities and refractive indices of the aqueous Quaternary System of lithium sulfate, lithium metaborate, and lithium carbonate at 288.15, 298.15, 308.15 K and 0.1 MPa were determined with isothermal dissolution method. According to the experimental results, the dry-salt phase diagrams, water-phase diagrams, and the diagrams of physicochemical properties including density, pH, and refractive index versus composition of lithium sulfate at three temperatures were plotted. In the dry-salt phase diagrams at three temperatures, there are four crystallization regions corresponding to lithium metaborate octahydrate (LiBO2·8H2O, LB), lithium carbonate (Li2CO3, LC), and lithium sulfate monohydrate (Li2SO4·H2O, LS), and three univariant-solubility curves corresponding to minerals of LS, LB, and LC, and one invariant point of three coexisted minerals (LS + LB + LC). A comparison of the phase diagrams at 288.15, 298.15, and 308.15 K shows that the areas of lithium sulfate monohydrate and lithium metabor...
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predictions on the solubility and equiscale line of water content for the Quaternary System li na cl so4 h2o at 298 15k
Calphad-computer Coupling of Phase Diagrams and Thermochemistry, 2015Co-Authors: Liu Yuanhui, Yafei Guo, Xuekui Wang, Pengsheng Song, Tianlong DengAbstract:Abstract Pitzer ion-interaction theory is widely used to calculate the solubilities of salt–water Systems. In the paper, the solubilities and equiscale lines of water contents of the reciprocal Quaternary System (Li+Na+Cl+SO4+H2O) at 298.15 K were calculated using Pitzer theory and Harvie, Moller, Weare solubility modeling approach (HMW model). In this predictive calculation, the quasi-Newton and dichotomy methods were used to solve the System of simultaneous equations of the equilibrium expressions among solid and liquid phases, and to obtain the ionic molalities, Janecke indices of phase diagram and the Janecke indices of the equiscale lines of water contents in the reciprocal Quaternary System. Based on the Janecke indices, the dry-salt phase diagram and the equiscale lines of water-phase diagram were plotted. The predictive phase diagram via the theoretical calculation agrees well with the experimental phase diagram except for the phase region of double salt 2 (Li2SO4·Na2SO4, Db2). Distributions of equiscale lines of water-phase diagram on the dry-salt diagram of the reciprocal Quaternary System reflect that phase areas of double salts of Db1 and Db2 bear maximal water contents. The predictive phase diagram and equiscale lines of water-phase diagram are often necessary in the technological design of chemical engineering for the utilization of inorganic salts in salt lake brines.
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stable phase equilibrium of the aqueous Quaternary System mgcl2 mgso4 mgb6o10 h2o at 323 15 k
Journal of Chemical & Engineering Data, 2011Co-Authors: Lingzong Meng, Yafei Guo, Tianlong DengAbstract:The solubilities and relevant physicochemical properties including density and pH values of the aqueous Quaternary System (MgCl2 + MgSO4 + MgB6O10 + H2O) at 323.15 K were determined for the first time with the method of isothermal dissolution. According to the experimental results, the dry-salt-phase diagram, water-phase diagram, and physicochemical properties versus composition diagrams were plotted. It was found that there are three three-salt cosaturated invariant points, seven univariant solubility isotherm curves, and five stable crystallization fields corresponding to bischofite (MgCl2·6H2O, Bis), kieserite (MgSO4·H2O, Kie), tetrahydrite (MgSO4·4H2O, Tet), hexahydrite (MgSO4·6H2O, Hex), and mcallisterite (Mg(B6O7)(OH)6·4.5H2O, Mca). Neither solid solution nor double salts were found. On the basis of the extended Harvie–Weare (HW) model and its temperature-dependent equation, single-salt parameters β(0), β(1), β(2), and Cϕ for MgCl2, MgSO4, and Mg(B6O7)(OH)6, mixed ion-interaction parameters θC1,SO4,...
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solid liquid metastable equilibria of the reciprocal Quaternary System licl mgcl2 li2so4 mgso4 h2o at 323 15 k
Journal of Chemical & Engineering Data, 2011Co-Authors: Lingzong Meng, Tianlong DengAbstract:Experimental studies on the metastable solubilities and the physicochemical properties (density, pH value, conductivity, and viscosity) of the aqueous reciprocal Quaternary System (LiCl + MgCl2 + Li2SO4 + MgSO4 + H2O) at 323.15 K were determined with the isothermal evaporation method. According to the experimental results, the dry-salt phase diagram, water-phase diagram, and the physicochemical properties versus composition diagram were plotted. It was found that there are four invariant points, nine metastable solubility isotherm curves, and six metastable crystallization fields corresponding to lithium chloride monohydrate (LiCl·H2O), bischofite (MgCl2·6H2O), starkeyite (MgSO4·4H2O), hexahydrite (MgSO4·6H2O), lithium sulfate monohydrate (Li2SO4·H2O), and the double salt lithium-carnallite (LiCl·MgCl2·7H2O). No solid solution was found. On the basis of the extended Harvie–Weare (HW) model and its temperature-dependent equation, the values of the Pitzer parameters β(0), β(1), β(2), and Co for Li2SO4, MgCl...
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metastable phase equilibrium of the reciprocal Quaternary System licl kcl li2so4 k2so4 h2o at 308 15 k
Journal of Chemical & Engineering Data, 2011Co-Authors: Tianlong Deng, Pengsheng SongAbstract:The solubilities and the physicochemical properties including the density, viscosity, refractive index, conductivity, and pH value of the aqueous Quaternary System LiCl + KCl + Li2SO4 + K2SO4 + H2O at 308.15 K were determined with the isothermal evaporation method. On the basis of the Janecke indices, the dry-salt phase diagram, the water-phase diagram, and the diagrams of physicochemical properties were plotted. The dry-salt phase diagram of the System includes three three-salt cosaturation invariant points, seven univariant solubility curves, and five crystallization zones corresponding to potassium sulfate, potassium chloride, the double salt lithium potassium sulfate, lithium sulfate monohydrate, and lithium chloride monohydrate. Single-salt parameters β(0), β(1), and C(φ) for lithium sulfate, potassium sulfate, and potassium chloride, mixed electrolyte parameters θCl,SO4 and ΨK,Cl,SO4, and the Debye−Hukel limiting slope AΦ at 308.15 K were calculated according to the temperature-dependent equations p...
Rui-zhi Cui - One of the best experts on this subject based on the ideXlab platform.
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solubility measurement and prediction of phase equilibria in the Quaternary System licl nacl kcl h2o and ternary subSystem licl nacl h2o at 288 15 k
Chinese Journal of Chemical Engineering, 2020Co-Authors: Rui-zhi CuiAbstract:Abstract Using isothermal dissolution method, the phase equilibrium relationship in Quaternary System LiCl + NaCl + KCl + H2O and the ternary subSystem LiCl + NaCl + H2O at 288.15 K were investigated. Each phase diagram of two Systems was drawn. The phase diagram of LiCl + NaCl + H2O System contains two solid phase regions of crystallization LiCl·2H2O and NaCl. In the phase diagram of LiCl + NaCl + KCl + H2O System, there are three crystallization regions: LiCl·2H2O, NaCl and KCl respectively. In this paper, the solubilities of phase equilibria in two Systems were calculated by Pitzer's model at 288.15 K. The predicted phase diagrams generally agree with the experimental phase diagrams.
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measurement and prediction of solid liquid equilibria in the Quaternary System licl kcl li2so4 k2so4 h2o at 288 15 k
Journal of Chemical & Engineering Data, 2019Co-Authors: Rui-zhi Cui, Yaping DongAbstract:The phase equilibria relationship between the Quaternary System LiCl–KCl–Li2SO4–K2SO4–H2O and its subSystems LiCl–KCl–H2O and LiCl–Li2SO4–H2O was studied by the isothermal dissolution equilibrium m...
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Phase equilibria of Quaternary System NaCl-NaBr-Na 2 B 4 O 7 -H 2 O at 348 K
Chemical Research in Chinese Universities, 2013Co-Authors: Shihua Sang, Rui-zhi Cui, Kai-jie ZhangAbstract:The phase equilibria of Quaternary System NaCl-NaBr-Na2B4O7-H2O at 348 K were studied by the isothermal equilibrium method. The solubilities and densities of the equilibrium solution were determined. According to the experimental data, the phase diagram, density-composition diagrams and water content diagram of the Quaternary System at 348 K were plotted respectively. And the phase diagram consists of one univariant curve, two crystallization fields and without any invariant point of the Quaternary System. The equilibrium solid phases of the two crystallization fields were Na(Cl, Br) and Na2B4O7·5H2O. The experimental results show that the Quaternary System contained solid solution. The densities of the solution decrease with increasing NaCl concentration and increase with increasing NaBr concentration.
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liquid solid equilibria in the Quaternary System kcl kbr k2so4 h2o at 348 k
Journal of Chemical & Engineering Data, 2013Co-Authors: Kai-jie Zhang, Shihua Sang, Rui-zhi CuiAbstract:The solubilities and densities of solid–liquid equilibria in the Quaternary System KCl–KBr–K2SO4–H2O at 348 K were determined experimentally by using an isothermal solution saturation method. According to the experimental data, the phase diagram of the Quaternary System was plotted. In the equilibrium phase diagram of the Quaternary KCl–KBr–K2SO4–H2O System at 348 K, there are one univariant dissolution curve and two crystallization fields corresponding to K(Cl, Br) and K2SO4, and no invariant point has been found in this Quaternary System. The Quaternary System contained solid solution K(Cl, Br). The density values in the equilibrium solution increase with the increase of potassium bromide concentration and decrease with the increase of potassium chloride concentration.
Shiqiang Wang - One of the best experts on this subject based on the ideXlab platform.
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Solubilities, Densities and Refractive Indices in the Aqueous Quaternary System of Lithium Sulfate, Lithium Metaborate, and Lithium Carbonate at 288.15, 298.15, 308.15 K and 0.1 MPa
Journal of Chemical & Engineering Data, 2016Co-Authors: Yafei Guo, Shiqiang Wang, Lina Cao, Tianlong DengAbstract:Solubilities, densities and refractive indices of the aqueous Quaternary System of lithium sulfate, lithium metaborate, and lithium carbonate at 288.15, 298.15, 308.15 K and 0.1 MPa were determined with isothermal dissolution method. According to the experimental results, the dry-salt phase diagrams, water-phase diagrams, and the diagrams of physicochemical properties including density, pH, and refractive index versus composition of lithium sulfate at three temperatures were plotted. In the dry-salt phase diagrams at three temperatures, there are four crystallization regions corresponding to lithium metaborate octahydrate (LiBO2·8H2O, LB), lithium carbonate (Li2CO3, LC), and lithium sulfate monohydrate (Li2SO4·H2O, LS), and three univariant-solubility curves corresponding to minerals of LS, LB, and LC, and one invariant point of three coexisted minerals (LS + LB + LC). A comparison of the phase diagrams at 288.15, 298.15, and 308.15 K shows that the areas of lithium sulfate monohydrate and lithium metabor...
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metastable phase equilibria of the reciprocal Quaternary System containing lithium sodium chloride and sulfate ions at 273 15 k
Journal of Chemical & Engineering Data, 2010Co-Authors: Shiqiang Wang, Tianlong DengAbstract:Experimental studies on the metastable solubilities and the physicochemical properties including density, refractive index, conductivity, and pH values in the reciprocal Quaternary System containing lithium, sodium, chloride, and sulfate at 273.15 K were determined with the method of isothermal evaporation. According to the experimental results, the dry-salt phase diagram, the water phase diagram, and the physicochemical properties versus composition were plotted. In the dry-salt phase diagram, there are three invariant points, seven solubility isotherm curves, and five crystallization fields corresponding to sodium chloride, mirabilite, lithium chloride dehydrate (LiCl·2H2O), lithium sulfate monohydrate, and a double salt (Li2SO4·3Na2SO4·12H2O). There were no solid solutions formed in the reciprocal Quaternary System. The crystallizing region of mirabilite is the largest, while the region of LiCl·2H2O is the smallest with the highest concentration and a strong salting-out effect to NaCl and Li2SO4·H2O. W...
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metastable phase equilibrium in the reciprocal Quaternary System nacl mgcl2 na2so4 mgso4 h2o at 273 15 k
Journal of Chemical & Engineering Data, 2008Co-Authors: Tianlong Deng, Shiqiang WangAbstract:Experimental studies on the metastable solubilities and the physicochemical properties (density, refractive index, conductivity, and pH value) in the aqueous reciprocal Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K were determined with the isothermal evaporation method. According to the experimental results, the dry-salt-phase diagram, water-phase diagram, and physicochemical properties versus composition diagrams were plotted. It was found that there are two three-salt cosaturated points, five metastable solubility isotherm curves, and four metastable crystallization fields corresponding to sodium chloride, epsomite, mirabilite, and bischofite. Neither solid solutions nor double salts were found. On the basis of Pitzer’s semiempirical equation for a mixed aqueous electrolytic solution, the extended HW model (Harvie and Meare) and the temperature-dependent equation were used for fitting the Pitzer single-salt parameters β(0), β(1), β(2), and Cϕ for NaCl, MgCl2, Na2SO4, and MgSO4, the...
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metastable phase equilibrium in the aqueous Quaternary System kcl k2so4 k2b4o7 h2o at 308 15 k
Journal of Chemical & Engineering Data, 2008Co-Authors: Tianlong Deng, Shiqiang Wang, Bai SunAbstract:Experimental studies on the metastable solubilities and the physicochemical properties including density, viscosity, refractive index, conductivity, and pH of the aqueous Quaternary System (KCl + K2SO4 + K2B4O7 + H2O) at 308.15 K were determined with the method of isothermal evaporation. According to the experimental results, the dry-salt phase diagram, the water diagram, and the physicochemical properties via composition diagrams were plotted. It was found that there is one three-salt cosaturation point of KCl + K2SO4 + K2B4O7·4H2O, three univariant curves, and three metastable crystallization fields corresponding to potassium chloride, potassium sulfate, and potassium borate tetrahydrate formed in the metastable Quaternary System. Neither solid solution nor double salts were found.
Yaping Dong - One of the best experts on this subject based on the ideXlab platform.
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measurement and prediction of solid liquid equilibria in the Quaternary System licl kcl li2so4 k2so4 h2o at 288 15 k
Journal of Chemical & Engineering Data, 2019Co-Authors: Rui-zhi Cui, Yaping DongAbstract:The phase equilibria relationship between the Quaternary System LiCl–KCl–Li2SO4–K2SO4–H2O and its subSystems LiCl–KCl–H2O and LiCl–Li2SO4–H2O was studied by the isothermal dissolution equilibrium m...
Qi Tan - One of the best experts on this subject based on the ideXlab platform.
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stable phase equilibrium of aqueous Quaternary System li k mg2 borate h2o at 348 k
Journal of Chemical Engineering of Japan, 2014Co-Authors: Qi Tan, Yujuan ZhangAbstract:The solubility values and physicochemical properties such as densities, refractive indices, and pH values of the equilibrium solution in the Quaternary System Li+, K+, Mg2+//borate–H2O at 348 K were measured by isothermal dissolution method. The phase diagram, water content diagram, and the diagrams of the physicochemical properties versus composition were constructed using the measured data. Results show that this Quaternary System at 348 K is of a simple type, no double salt or solid solution formed. The stable phase diagram of this Quaternary System consists of one invariant point, three univariant curves, and three crystalline phase areas. The invariant point saturated with three salts corresponding to lithium tetraborate trihydrate (Li2B4O7·3H2O), potassium tetraborate tetrahydrate (K2B4O7·4H2O), and hungchaoite (MgB4O7·9H2O). The crystallization field of MgB4O7·9H2O is the maximum, meaning that the salt magnesium borate has the smallest solubility among the coexisting salts. Comparisons between the ...
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phase equilibria for the aqueous reciprocal Quaternary System rb mg2 cl borate h2o at 348 k
Journal of Chemical & Engineering Data, 2014Co-Authors: Qinghong Yin, Qi Tan, Ying ZengAbstract:Phase equilibria for the reciprocal Quaternary System containing rubidium, magnesium, chloride, and borate in aqueous solution at 348 K was investigated by isothermal dissolution method. The compositions, densities, and refractive indices of the solution at equilibrium were measured experimentally. The space phase diagram, the planar projection diagram, the water content diagram, and the diagrams of the physicochemical properties (densities and refractive indices) vs composition were constructed using the measured data. Results indicate that the Quaternary System is a complex type along with the double salt rubidium carnallite (RbCl·MgCl2·6H2O) formed at 348 K. The planar projection diagram consists of three invariant points, seven univariant curves and five crystallization zones corresponding to four single salts rubidium pentaborate tetrahydrate (RbB5O6(OH)4·2H2O), hungchaoite (MgB4O5(OH)4·7H2O), rubidium chloride(RbCl), bischofite(MgCl2·6H2O), and a double salt of rubidium carnallite (RbCl·MgCl2·6H2O)....
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solid liquid equilibrium in the aqueous System containing the chlorides of lithium rubidium and magnesium at 323k
Fluid Phase Equilibria, 2014Co-Authors: Dongbo Jiang, Qi Tan, Ying ZengAbstract:Abstract The densities, refractive indices and compositions of solutions of electrolyte mixtures in Quaternary System LiCl + RbCl + MgCl 2 + H 2 O at 323 K were determined by isothermal evaporation method. The stereo phase diagram, the metastable phase diagram, the water content diagram, and the diagrams of the physicochemical properties depending on the composition were obtained using the measured data. The metastable phase diagram of this Quaternary System contains three invariant points (H 1 , H 2 , and H 3 ), seven univariant curves, and five crystallization fields corresponding to single salts lithium chloride monohydrate (LiCl·H 2 O), rubidium chloride (RbCl), magnesium chloride hexahydrate (MgCl 2 ·6H 2 O), and two double salts: lithium carnallite (LiCl·MgCl 2 ·7H 2 O) and rubidium carnallite (RbCl·MgCl 2 ·6H 2 O). The scope of areas of crystallization of salts is such that RbCl·MgCl 2 ·6H 2 O > RbCl > LiCl·H 2 O > MgCl 2 ·6H 2 O > LiCl·MgCl 2 ·7H 2 O. The physicochemical properties of the solutions, at equilibrium, change regularly with the change of the concentration of MgCl 2 .
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metastable phase equilibrium in the Quaternary System licl kcl rbcl h2o at 348 15 k
Journal of Chemical & Engineering Data, 2013Co-Authors: Qinghong Yin, Qi TanAbstract:The metastable phase equilibrium of the Quaternary System LiCl + KCl + RbCl + H2O at 348.15 K was done by using an isothermal evaporation method. The solubilities, densities, and refractive indices of the equilibrated solution were determined experimentally. On the basis of the measured data, the stereo phase diagram, the metastable phase diagram, the water content diagram, and the physicochemical properties versus composition diagrams were constructed. Results show that the Quaternary System is of a complex type with the solid solution of potassium chloride and rubidium chloride [(K, Rb)Cl] formed at 348.15 K. The metastable phase diagram consists of two invariant points, five univariant curves, and four crystallization fields corresponding to single salts potassium chloride (KCl), rubidium chloride (RbCl), lithium chloride monohydrate (LiCl·H2O), and a solid solution of potassium and rubidium chloride [(K, Rb)Cl]. Salt RbCl has the largest solubility among the coexisting salts and presents the smallest ...
