2
0
journal
Original
Zhao, X.[Xiangpo]
Zhang, X.[Xueping]
Yang, Y.[Yuyan]
Sang, S.-H.[Shi-Hua]
J. Chem. Eng. Data
2017
2017-08-30
Phase Equilibria in the Quaternary Systems KCl K2B4O7 K2SO4 H2O and MgCl2 MgB4O7 MgSO4 H2O at 273 K
The method of isothermal dissolution equilibrium was used to study the solubilities of salts and the densities of saturated solutions in the two quaternary systems KCl K2B4O7 K2SO4 H2O and MgCl2 MgB4O7 MgSO4 H2O at 273 K. The equilibrium solid phases were also determined by the method of X-ray diffraction. On the basis of experimental results, the phase diagrams and density versus composition diagrams of those quaternary systems at 273 K were plotted. The results indicate that both the phase diagrams of the two systems consist of one invariant point, three stable solubility isothermal curves, and three crystalline regions. The crystallization fields for the system KCl K2B4O7 K2SO4 H2O correspond to K2B4O7*4H2O, KCl, and K2SO4. Those for the system MgCl2 MgB4O7 MgSO4 H2O correspond to MgB4O7*9H2O, MgCl2*6H2O and MgSO4*7H2O.
Phase equilibrium
Solubility
Density
10.1021/acs.jced.6b00926
62
1377-1383
1
potassium chloride
ClK
1
Commercial source
1
99.5
3
Stated by supplier
2
magnesium chloride
Cl2Mg
1
Commercial source
1
98
2
Stated by supplier
3
potassium tetraborate
B4K2O7
1
Commercial source
1
99.5
3
Stated by supplier
4
magnesium tetraborate
B4MgO7
1
Synthesized by the authors
1
98
2
Other types of titration
5
potassium sulfate
K2O4S
1
Synthesized by the authors
1
99
2
Stated by supplier
6
magnesium sulfate
MgO4S
1
Synthesized by the authors
1
99
2
Stated by supplier
7
water
H2O
1
Commercial source
1
99.8
3
Estimated by the compiler
3
1
1
1
7
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass density, kg/m3
Pycnometric method
Liquid
Direct value, X
Liquid
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
3
Liquid
2
Mass fraction
1
Liquid
1
.0207
3
2
.2132
4
1
1166
4
3
1
1
1
7
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
1
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
3
Liquid
1
.0207
3
1
.2132
4
3
1
1
1
7
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
1
Liquid
Direct value, X
Liquid
Crystal
1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
3
Liquid
1
.0207
3
1
.2132
4
3
1
7
1
5
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass density, kg/m3
Pycnometric method
Liquid
Direct value, X
Liquid
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
5
Liquid
2
Mass fraction
3
Liquid
1
.0541
3
2
.0627
3
1
1064
4
3
1
7
1
5
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
3
Liquid
Direct value, X
Liquid
Crystal
5
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
5
Liquid
1
.0541
3
1
.0627
3
3
1
7
1
5
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
3
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
5
Liquid
1
.0541
3
1
.0627
3
1
1
7
1
5
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass density, kg/m3
Pycnometric method
Liquid
Direct value, X
Liquid
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
5
Liquid
2
Mass fraction
1
Liquid
1
.0095
2
2
.2162
4
1
1159
4
1
1
7
1
5
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
1
Liquid
Direct value, X
Liquid
Crystal
5
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
5
Liquid
1
.0095
2
1
.2162
4
1
1
7
1
5
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
1
Liquid
Direct value, X
Liquid
Crystal
1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
5
Liquid
1
.0095
2
1
.2162
4
6
1
7
1
4
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass density, kg/m3
Pycnometric method
Liquid
Direct value, X
Liquid
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
4
Liquid
2
Mass fraction
6
Liquid
1
.0075
2
2
.2092
4
1
1221
4
6
1
7
1
4
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
6
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
4
Liquid
1
.0075
2
1
.2092
4
6
1
7
1
4
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
6
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 2
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
4
Liquid
1
.0075
2
1
.2092
4
6
1
7
1
2
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass density, kg/m3
Pycnometric method
Liquid
Direct value, X
Liquid
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
2
Liquid
2
Mass fraction
6
Liquid
1
.3355
4
2
.015
2
1
1279
4
6
1
7
1
2
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
6
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
2
Liquid
1
.3355
4
1
.015
2
6
1
7
1
2
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
6
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 2
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
2
Liquid
1
.3355
4
1
.015
2
7
1
2
1
4
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass density, kg/m3
Pycnometric method
Liquid
Direct value, X
Liquid
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
2
Liquid
2
Mass fraction
4
Liquid
1
.3381
4
2
.0159
3
1
1325
4
7
1
2
1
4
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
4
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 1
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
2
Liquid
1
.3381
4
1
.0159
3
7
1
2
1
4
1
Principal objective of the work
EP
EP
2/22/2017
1
Mass fraction
Titration method
4
Liquid
Direct value, X
Liquid
Crystal of intercomponent compound 2
Temperature, K
273
3
Pressure, kPa
94.77
4
1
Mass fraction
2
Liquid
1
.3381
4
1
.0159
3