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Citation: SANG Shi-Hua, PENG Jiang, WEI Li-Na. Solid-Liquid Phase Equilibrium of the Quaternary System Mg²⁺, K⁺//Cl^-, B₄O^2-₇-H₂O at 288 K[J]. Acta Physico-Chimica Sinica, ;2009, 25(02): 331-335. doi: 10.3866/PKU.WHXB20090223 shu

Solid-Liquid Phase Equilibrium of the Quaternary System Mg²⁺, K⁺//Cl^-, B₄O^2-₇-H₂O at 288 K

1.
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P. R. China

Received Date: 25 August 2008
Available Online: 28 November 2008

Phase equilibria of the reciprocal quaternary system Mg2+, K+//Cl-, B4O2-7-H2O at 288 K were studied by the isothermal solution equilibrium method. Solubilities and densities in solution of the system were determined experimentally. The equilibrium phase diagram and the density-composition diagram of the quaternary system were plotted using experimental data. Experimental results also showed that the double salt KCl·MgCl2·6H2O formed in the quaternary system Mg2+, K+//Cl-, B4O2-7-H2O at 288 K. The quaternary system at 288 K had three invariant points (F1, F2, and F3), seven univariant curves, and five fields of crystallization [MgB4O7·9H2O, K2B4O7·4H2O, KCl, MgCl2·6H2O, and KCl·MgCl2·6H2O]. The results are discussed simply.
- Salt-water system; Phase equilibrium; Borate; Solubility
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Solid-Liquid Phase Equilibrium of the Quaternary System Mg2+, K+//Cl-, B4O2-7-H2O at 288 K

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通讯作者: 陈斌, bchen63@163.com

Solid-Liquid Phase Equilibrium of the Quaternary System Mg²⁺, K⁺//Cl^-, B₄O^2-₇-H₂O at 288 K