Measurements and calculations of solid-liquid equilibria in the quaternary system NaBr–KBr–Na2SO4–K2SO4–H2O at T = 348 K

Cui, Rui‐Zhi; Yang, Lei; Zhang, Xueping; Sang, Shi–Hua

doi:10.1016/j.fluid.2016.11.003

Cited by 11 publications

(6 citation statements)

References 15 publications

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“…K + content diagram (a) and water content diagram (b) of the quinary Na + , K + //Cl – , Br – , SO 4 2– –H 2 O system at 348.15 K (saturated with K 2 SO 4 ), value of point A 4 is from ref ; value of point B 4 is from ref ; values of other points are from Table in this work.…”

Section: Resultsmentioning

confidence: 99%

Solid–Liquid Equilibria in the Quinary System Na⁺, K⁺//Cl^–, Br^–, SO₄^2––H₂O at 323.15 and 348.15 K

Zhang,

Li,

Guo

et al. 2023

J. Chem. Eng. Data

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Aiming at the comprehensive utilization of bromine resources in bittern, the stable solid−liquid equilibria in the quinary system Na + , K + //Cl − , Br − , SO 4 2− −H 2 O at 323.15 and 348.15 K were studied using the isothermal dissolution equilibrium method. The corresponding phase equilibrium data were measured, and with which the simplified equilibrium dry-salt phase diagrams saturated with Na 2 SO 4 and K 2 SO 4 , respectively, Na + content diagrams and K + content diagrams were plotted. As a result, the quinary system saturated with Na 2 SO 4 at both two temperatures contains an invariant point, three univariant curves, and three crystallization regions including the single-salt KBr, the double-salt Na 2 SO 4 •3K 2 SO 4 , and the solid solution Na(Cl, Br). The crystallization areas of Na 2 SO 4 •3K 2 SO 4 , Na(Cl, Br), and KBr decrease in sequence. By comparison, the phase diagrams of the quinary system saturated with K 2 SO 4 at both 323.15 and 348.15 K are much simpler and have no invariant points, instead of one univariant curve and two crystallization regions (Na 2 SO 4 •3K 2 SO 4 and K(Cl, Br)). The crystallization area of Na 2 SO 4 •3K 2 SO 4 is essentially as large as that of K(Cl, Br).

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Section: Resultsmentioning

confidence: 99%

Solid–Liquid Equilibria in the Quinary System Na⁺, K⁺//Cl^–, Br^–, SO₄^2––H₂O at 323.15 and 348.15 K

Zhang,

Li,

Guo

et al. 2023

J. Chem. Eng. Data

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“…The early reports on equilibrium solubilities of the ternary systems LiI–LiBr–H 2 O and NH 4 Br–LiBr–H 2 O at 298.2 K stemmed from Tang et al For the Western Sichuan Basin (in China) brine-salt complex multicomponent system Na–K–B 4 O 7 –Br–Cl–SO 4 –H 2 O, Sang’s research group has done a lot of studies on subsystems NaBr–Na 2 SO 4 –H 2 O and KBr–K 2 SO 4 –H 2 O at 348.15 K and NaBr–KBr–Na 2 SO 4 –K 2 SO 4 –H 2 O and Na 2 B 4 O 7 –Na 2 SO 4 –NaBr–H 2 O at 298.15, 323.15, and 348.15 K. − Dan, Yang, Meng et al fitted the ion-interaction parameters in the ternary system MgBr 2 –MgSO 4 –H 2 O at 288.15, 323.15, and 333.15 K and calculated the corresponding solubilities. Christov − established a new chemical model to calculate the phase equilibrium data of the system Na–K–Mg–Ca–Br–SO 4 –H 2 O, and the results were satisfactory.…”

Section: Introductionmentioning

confidence: 99%

Solubility Measurement and Calculation of the Quaternary System KCl–KBr–NaCl–NaBr–H₂O at 323.15 K

Zhang,

Li,

Guo

et al. 2023

J. Chem. Eng. Data

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“…By now, a great deal of experimental and theoretical research on phase equilibria of Br-containing systems has been reported. Aiming at Sichuan Basin (China) brine-salt resources which can be simplified as the Na–K–B 4 O 7 –Br–Cl–SO 4 –H 2 O complex multicomponent system, Sang’s group − has carried out a series of studies on phase equilibria and theoretical models of Br-containing subsystems. Christov − came up with a prediction model for the Br-containing system Na–K–Mg–Ca–Br–SO 4 –H 2 O, which was well validated.…”

Section: Introductionmentioning

confidence: 99%

Solid–Liquid Equilibria in the Quinary System KCl–KBr–NaCl–NaBr–H₂O at 298.15 K and Its Application

Zhang,

Li,

Guo

et al. 2023

Ind. Eng. Chem. Res.

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Solid−liquid equilibrium is a vital foundation for extracting bromine from bittern, which contains a high concentration of bromine resources. The phase equilibrium data of the quaternary system KCl−KBr−NaCl−NaBr−H 2 O at 298.15 K were measured by the approach of isothermal dissolution, and the phase diagram was plotted. The results showed that the quaternary system has an invariant point, three univariant curves, and three crystallization zones corresponding to three solid solutions: Na(Cl, Br), K(Cl, Br), and Na(Cl, Br)•2H 2 O. An improved model was used to calculate the solubilities of the quaternary system, and the computed values agree well with the experimental data. On the basis of the quaternary system KCl−KBr−NaCl−NaBr−H 2 O at 298.15 and 348.15 K and the ternary system NaBr−NaCl− CH 3 OH at 298.15 K, a new process was developed to extract NaBr products of which the purity was 98.23%. Above all, this method realized the full circulation of the mother solution.

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Measurements and calculations of solid-liquid equilibria in the quaternary system NaBr–KBr–Na2SO4–K2SO4–H2O at T = 348 K

Cited by 11 publications

References 15 publications

Solid–Liquid Equilibria in the Quinary System Na⁺, K⁺//Cl^–, Br^–, SO₄^2––H₂O at 323.15 and 348.15 K

Solid–Liquid Equilibria in the Quinary System Na⁺, K⁺//Cl^–, Br^–, SO₄^2––H₂O at 323.15 and 348.15 K

Solubility Measurement and Calculation of the Quaternary System KCl–KBr–NaCl–NaBr–H₂O at 323.15 K

Solid–Liquid Equilibria in the Quinary System KCl–KBr–NaCl–NaBr–H₂O at 298.15 K and Its Application

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Measurements and calculations of solid-liquid equilibria in the quaternary system NaBr–KBr–Na2SO4–K2SO4–H2O at T = 348 K

Cited by 11 publications

References 15 publications

Solid–Liquid Equilibria in the Quinary System Na+, K+//Cl–, Br–, SO42––H2O at 323.15 and 348.15 K

Solid–Liquid Equilibria in the Quinary System Na+, K+//Cl–, Br–, SO42––H2O at 323.15 and 348.15 K

Solubility Measurement and Calculation of the Quaternary System KCl–KBr–NaCl–NaBr–H2O at 323.15 K

Solid–Liquid Equilibria in the Quinary System KCl–KBr–NaCl–NaBr–H2O at 298.15 K and Its Application

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Solid–Liquid Equilibria in the Quinary System Na⁺, K⁺//Cl^–, Br^–, SO₄^2––H₂O at 323.15 and 348.15 K

Solid–Liquid Equilibria in the Quinary System Na⁺, K⁺//Cl^–, Br^–, SO₄^2––H₂O at 323.15 and 348.15 K

Solubility Measurement and Calculation of the Quaternary System KCl–KBr–NaCl–NaBr–H₂O at 323.15 K

Solid–Liquid Equilibria in the Quinary System KCl–KBr–NaCl–NaBr–H₂O at 298.15 K and Its Application