Solubility Phase Diagram of the Ternary System MgCl2-MgSO4-H2O at 323.15 and 348.15 K

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	Solubility Phase Diagram of the Ternary System MgCl2-MgSO4-H2O at 323.15 and 348.15 K
	Li, Hongxia 1; Zeng, Dewen 2; Yao, Yan 1; Gao, Chuan 1; Yin, Xia 3; Han, Haijun 1
	2014-07-01
发表期刊	JOURNAL OF CHEMICAL AND ENGINEERING DATA
卷号	59 期号:7 页码:2177-2185
摘要	Utilizing improvements in experimental equipment, analytical methods and the initial material, the solubility isotherms of the ternary system MgCl2-MgSO4-H2O were determined in detail at T = (323.15 and 348.15) K using an isothermal method of solid liquid equilibrium. The results indicate that the solid phases MgSO4 center dot nH(2)O((s)) (n = 6, 1) and MgCl2 center dot 6H(2)O((s)) are stable and MgSO4 center dot nH(2)O((s)) (n = 5, 4) are metastable at 323.15 K, which contradicts the results of a previous experimental study(1) in which the phase MgSO4 center dot 4H(2)O((s)) was reported as stable. The liquidus of the four solid phases MgSO4 center dot nH(2)O((s)) (n = 6, 4, 1) and MgCl2 center dot 6H(2)O((s)) were measured at 348.15 K in this work. The findings indicate that the phases MgSO4 center dot H2O(s) and MgCl2. 6H(2)O((s)) are stable and MgSO4-6H(2)O(s) and MgSO4 center dot 4H(2)O((s)) are metastable at 348.15 K. Remarkable differences between this work and the literature solubility data for the phase MgSO4 center dot H2O(s) at 348.15 K are observed. A Pitzer-Simonson-Clegg thermodynamic model was chosen to simulate the properties of the binary systems and to correlate the solubility isotherms of the ternary system at 298.15 K in our previous study and 323.15 K and 348.15 K in this work. Good agreement has been found between the calculated and experimental results. Applying the model parameters and solubility isotherms in the ternary system measured in this work, we obtained the solubility product parameters In K and chemical potentials for the solid phases MgSO4 center dot nH(2)O((s)) (n = 6, 5, 4, 1) over a wider temperature range than those for the binary system MgSO4-H2O.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5681
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China 3.Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Li, Hongxia,Zeng, Dewen,Yao, Yan,et al. Solubility Phase Diagram of the Ternary System MgCl2-MgSO4-H2O at 323.15 and 348.15 K[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2014,59(7):2177-2185.
APA	Li, Hongxia,Zeng, Dewen,Yao, Yan,Gao, Chuan,Yin, Xia,&Han, Haijun.(2014).Solubility Phase Diagram of the Ternary System MgCl2-MgSO4-H2O at 323.15 and 348.15 K.JOURNAL OF CHEMICAL AND ENGINEERING DATA,59(7),2177-2185.
MLA	Li, Hongxia,et al."Solubility Phase Diagram of the Ternary System MgCl2-MgSO4-H2O at 323.15 and 348.15 K".JOURNAL OF CHEMICAL AND ENGINEERING DATA 59.7(2014):2177-2185.