Solid–liquid phase equilibria in the system K2SO4–MgSO4–H2O at 318K

Wollmann, Georgia; Voigt, Wolfgang

doi:10.1016/j.fluid.2009.12.005

Cited by 12 publications

(6 citation statements)

References 22 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are three boundary subternary systems in this quaternary system, which are Li 2 SO 4 + K 2 SO 4 + H 2 O, Li 2 SO 4 + MgSO 4 + H 2 O, and K 2 SO 4 + MgSO 4 + H 2 O. − Solubilities and densities of the invariant points for the three subternary systems are shown in Table . The deviation of densities between the experimental value in this work and those previous reported is within 0.05%, and the compositions for the subternary systems in the literature agree well with our experimental results, indicating the experimental procedure and analysis are rational and reliable.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Thermodynamic Modeling Study of the Quaternary System Containing Lithium, Potassium, Magnesium, and Sulfate at 288.15 K

et al. 2019

View full text Add to dashboard Cite

Solid–liquid phase equilibria of the quaternary system (Li + K + Mg + SO4 + H2O) at 288.15 K were investigated with the isothermal dissolution method. The diagrams of solubilities, densities and refractive indices were plotted, respectively. The solubilities diagram of the quaternary system includes three invariant points cosaturated with three salts and five crystallization zones. Two kinds of double salts K2SO4·MgSO4·6H2O and Li2SO4·K2SO4 were found, and no solid solution was formed. Pitzer theory for aqueous electrolyte solution and its extended Harvie-Møller-Weare (HMW) model was used to calculate the solubilities of the quaternary system. A comparison between the calculated and the experimental results shows that the predicted solubilities obtained with the extended HMW model agree well with experimental data.

show abstract

Section: Resultsmentioning

confidence: 99%

Experimental and Thermodynamic Modeling Study of the Quaternary System Containing Lithium, Potassium, Magnesium, and Sulfate at 288.15 K

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Fig. 9(a)-(d) shows comparisons of the experimental solubility of the ternary system reported by Linke [41], Deng et al [42], and Wollmann and Voigt [44] 6. Aqueous Na + -K + -Mg 2+ -SO 4…”

Section: Thermodynamic Frameworkmentioning

confidence: 99%

Thermodynamic modeling of aqueous Na+–K+–Mg2+–SO42− quaternary system

Bhattacharia

Tanveer

Hossain

et al. 2015

Fluid Phase Equilibria

View full text Add to dashboard Cite

“…Among them, the interaction between ions in the sulfate system containing sodium, potassium, magnesium, and calcium is complex, and many kinds of double salts may be formed, which is the key to the research. So far, a series of experimental studies have been carried out on the sulfate system containing sodium, potassium, magnesium, and calcium, as described below: binary systems of Na 2 SO 4 –H 2 O at 272–514 K, K 2 SO 4 –H 2 O at 271.6–562.15 K, and MgSO 4 –H 2 O at 269.28–511.15 K; ternary systems of Na + , K + //SO 4 2– –H 2 O at 298.2, 303.2, 313.2, 323.2, and 348.2 K; − Na + , Mg 2+ //SO 4 2– –H 2 O at 298.2, 313.2, 318.2, 323.2, and 348.2 K; ,− and K + , Mg 2+ //SO 4 2– –H 2 O at 298.2, 308.2, 318.2, 323.2, and 348.2 K; ,− and quinary system Li + , Na + , K + , Mg 2+ //SO 4 2– –H 2 O at 298.2 K . By analysis of the above phase diagram, the results indicated that (1) the crystallization areas of single salts and double salts are different at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Solid–Liquid Phase Equilibria of Aqueous Quaternary System Na⁺, K⁺, Mg²⁺//SO₄^2––H₂O at T = 298.2 and 323.2 K

Zeng,

Ma,

et al. 2024

J. Chem. Eng. Data

View full text Add to dashboard Cite

The phase equilibria of aqueous quaternary system Na + , K + , Mg 2+ //SO 4 2− −H 2 O at T = 298.2 and 323.2 K were studied by the isothermal dissolution method. The density, refractive index, and composition of the equilibrium solution were determined, on the basis of which the phase diagrams and density/refractive index vs composition diagrams were drawn. There were four quaternary invariant points and six crystallization regions corresponding to single salts K 2 SO 4 , Na 2 SO 4 •10H 2 O, and MgSO 4 •7H 2 O and double salts Na 2 SO 4 •3K 2 SO 4 , Na 2 SO 4 •MgSO 4 •4H 2 O, and K 2 SO 4 •MgSO 4 • 6H 2 O in the quaternary system Na + , K + , Mg 2+ //SO 4 2− −H 2 O at 298.2 K. When the temperature of the system was increased to 323.2 K, the crystalline form of some salts changed Na 2 SO 4 •10H 2 O, MgSO 4 •7H 2 O, and K 2 SO 4 • MgSO 4 •6H 2 O transformed into Na 2 SO 4 , MgSO 4 •6H 2 O, and K 2 SO 4 •MgSO 4 • 4H 2 O, respectively. At 298.2 and 323.2 K, the crystallization region area of the potassium salt composed of Na 2 SO 4 •3K 2 SO 4 , K 2 SO 4 , and K 2 SO 4 •MgSO 4 •nH 2 O was more than 72% of the whole crystallization region area, which indicated that potassium was most easily crystallized from the system, at which the crystallization region of Na 2 SO 4 •3K 2 SO 4 was the largest; potassium may be more easily precipitated from this system in the form of Na 2 SO 4 •3K 2 SO 4 . With the increase in temperature from 298.2 to 323.2 K, the crystallization region of Na 2 SO 4 •MgSO 4 •4H 2 O significantly increased, while the crystallization regions of Na 2 SO 4 •nH 2 O and MgSO 4 •nH 2 O significantly reduced. The sodium and magnesium in the system can be removed according to the change in the crystallization regions of sodium and magnesium with temperature, which provides favorable conditions for the preparation of K 2 SO 4 .

show abstract

Solid–liquid phase equilibria in the system K2SO4–MgSO4–H2O at 318K

Cited by 12 publications

References 22 publications

Experimental and Thermodynamic Modeling Study of the Quaternary System Containing Lithium, Potassium, Magnesium, and Sulfate at 288.15 K

Experimental and Thermodynamic Modeling Study of the Quaternary System Containing Lithium, Potassium, Magnesium, and Sulfate at 288.15 K

Thermodynamic modeling of aqueous Na+–K+–Mg2+–SO42− quaternary system

Solid–Liquid Phase Equilibria of Aqueous Quaternary System Na⁺, K⁺, Mg²⁺//SO₄^2––H₂O at T = 298.2 and 323.2 K

Contact Info

Product

Resources

About

Solid–liquid phase equilibria in the system K2SO4–MgSO4–H2O at 318K

Cited by 12 publications

References 22 publications

Experimental and Thermodynamic Modeling Study of the Quaternary System Containing Lithium, Potassium, Magnesium, and Sulfate at 288.15 K

Experimental and Thermodynamic Modeling Study of the Quaternary System Containing Lithium, Potassium, Magnesium, and Sulfate at 288.15 K

Thermodynamic modeling of aqueous Na+–K+–Mg2+–SO42− quaternary system

Solid–Liquid Phase Equilibria of Aqueous Quaternary System Na+, K+, Mg2+//SO42––H2O at T = 298.2 and 323.2 K

Contact Info

Product

Resources

About

Solid–Liquid Phase Equilibria of Aqueous Quaternary System Na⁺, K⁺, Mg²⁺//SO₄^2––H₂O at T = 298.2 and 323.2 K