Phase Equilibrium of the Quaternary System Li + , Mg 2+ //SO 4 2- , B 4 O 7 2- -H 2 O at 273 K

被引：0

作者：

Xu J.-S. ^{[1
]}

Zhang W.-Y. ^{[1
]}

Sang S.-H. ^{[1
,2
]}

机构：

[1] College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu

[2] Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2018年 / 32卷 / 06期

关键词：

Borate; Dry-salt phase diagram; Solubility; Sulfate;

D O I：

10.3969/j.issn.1003-9015.2018.06.029

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：

Phase equilibrium of water-salt systems containing lithium is not well studied. An isothermal dissolution equilibrium method was used to study phase equilibrium of Li + , Mg 2+ //SO 4 2- , B 4 O 7 2- -H 2 O quaternary system at 273 K, and phase diagram was obtained. The results show that this quaternary system is a simple interactive quaternary system without double salt or solid solution formation. The phase diagram contains two invariant points, five univariant curves and four crystallization areas (corresponding to Li 2 B 4 O 7 •3H 2 O, Li 2 SO 4 •H 2 O, MgB 4 O 7 •9H 2 O and MgSO 4 •7H 2 O). The phase diagram shows that MgB 4 O 7 has the largest phase region and the lowest solubility. Phase diagrams at different temperatures were compared and the results show that with the increase of temperature, the crystallization regions of MgSO 4 and MgB 4 O 7 decrease significantly, while the crystallization regions of Li 2 B 4 O 7 and Li 2 SO 4 increase significantly. The results show that the solubility of MgSO 4 and MgB 4 O 7 is more sensitive to temperature than that of Li 2 B 4 O 7 and Li 2 SO 4 . © 2018, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.

引用

页码：1458 / 1464

页数：6

共 15 条

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