Citation: Liao Ling, Huang Xueli. Liquid-Solid Phase Equilibria in the Quinary System ofNa⁺, K⁺//Cl^-, SO₄^2-, NO₃^--H₂O at 273.15 K[J]. Chemistry, ;2016, 79(1): 62-65,61. shu

Liquid-Solid Phase Equilibria in the Quinary System ofNa⁺, K⁺//Cl^-, SO₄^2-, NO₃^--H₂O at 273.15 K

Liao Ling ,
Huang Xueli ^,

1.
Key Laboratory of Xinjiang Coal Clean Conversion and Chemical Process, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046

Corresponding author: Huang Xueli,
Received Date: 24 April 2015
Available Online: 4 August 2015
Fund Project:

Xinjiang is rich in saline lake resources and has a long cold winter, some researches showed that brine can be separated by using cold energy in winter. The liquid-solid phase equilibriums of Na⁺, K⁺//Cl^-, SO₄^2-, NO₃^--H₂O and Na⁺, K⁺//Cl^-, NO₃^--H₂O systems were investigated by isothermal method at 273.15K. Based on the data of literatures and experiments, solubilities and densities of the two systems were received and the phase diagrams were plotted. The results showed that the phase diagram of the system Na⁺, K⁺//Cl^-, NO₃^--H₂O consists of two invariant points, five invariant curves and four crystallization regions corresponding to NaNO₃, NaCl, KNO₃ and KCl respectively. In addition, compared with the phase diagram of this quaternary system at 298.15K, the crystalline region of KNO₃ becomes larger. For the system Na⁺, K⁺//Cl^-, SO₄^2-, NO₃^--H₂O saturated with NaCl, the phase diagram consists of two invariant points, five invariant curves, four crystallization regions corresponding to NaCl+Na₂SO₄·10H₂O, NaCl+NaNO₃, NaCl+KNO₃, and NaCl+KCl respectively. Compared with the phase diagram of this system at 298.15K, it was more simple, in which the crystalline regions of double salts, glaserite and darapskite, disappear, and the Na₂SO₄·10H₂O crystalline region becomes larger.
- Nitrate,
- Salt-water system,
- Low temperature,
- Phase equilibrium,
- Double salts
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沈阳化工大学材料科学与工程学院沈阳 110142

Liquid-Solid Phase Equilibria in the Quinary System ofNa+, K+//Cl-, SO42-, NO3--H2O at 273.15 K

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通讯作者: 陈斌, bchen63@163.com

Liquid-Solid Phase Equilibria in the Quinary System ofNa⁺, K⁺//Cl^-, SO₄^2-, NO₃^--H₂O at 273.15 K