Solubilities of Salts in Quaternary System KBr-K2SO4-K2B4O7-H2O and Quinary System KCl-KBr-K2SO4-K2B4O7-H2O at 373 K

被引：0
|
作者：
Nie, Guo-Liang [1 ,2 ]
Sang, Shi-Hua [1 ,2 ]
Ye, Chao [1 ,2 ]
Gao, Yun-Yun [1 ,2 ]
He, Chun-Xia [1 ,2 ]
机构：
[1] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China
[2] Mineral Resources Chem Key Lab Sichuan Higher Edu, Chengdu 610059, Peoples R China
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2021年 / 95卷 / 07期
基金：
中国国家自然科学基金;
关键词：
underground brine; phase equilibrium; solubility; solid solution; potassium salt; SOLID-LIQUID EQUILIBRIA; METASTABLE EQUILIBRIA; KCL-KBR-K2B4O7-H2O; 25-DEGREES-C; NA+;
D O I：
10.1134/S0036024421070189
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The underground brines are large reserves of valuable mineral resources. Aiming at the underground brines of western Sichuan Basin, the phase equilibria of quinary system KCl-KBr-K2SO4-K2B4O7-H2O and its quaternary subsystem KBr-K2SO4-K2B4O7-H2O were studied by using the method of isothermal dissolution equilibrium at 373 K. The phase diagrams, water content diagrams and density-composition relationship diagrams of above two systems were plotted by using the experimental data, respectively. The results show that the quaternary system KBr-K2SO4-K2B4O7-H2O belongs to a simple type; it consists of three univariant curves, one invariant point and three crystallization regions (K(2)B(4)O(7)4H(2)O, K2SO4, and KBr). The equilibrium phase diagram (saturated with K2SO4) in the quinary system KCl-KBr-K2SO4-K2B4O7-H2O is a type of solid solution, and there are two crystallization regions (K(2)B(4)O(7)4H(2)O, solid solution K(Cl,Br)) (saturated with K2SO4), one univariant curve and no invariant point.
引用
收藏
页码：1372 / 1377
页数：6
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