Metastable Phase Equilibrium in the Reciprocal Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K

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	Metastable Phase Equilibrium in the Reciprocal Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K
	Deng, Tianlong 1,2; Wang, Shiqiang 1,3
	2008-12-01
发表期刊	JOURNAL OF CHEMICAL AND ENGINEERING DATA
卷号	53 期号:12 页码:2723-2727
摘要	Experimental studies on the metastable solubilities and the physicochemical properties (density, refractive index, conductivity, and pH value) in the aqueous reciprocal quaternary system (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K were determined with the isothermal evaporation method. According to the experimental results, the dry-salt-phase diagram, water-phase diagram, and physicochemical properties versus composition diagrams were plotted. It was found that there are two three-salt cosaturated points, five metastable solubility isotherm curves, and four metastable crystallization fields corresponding to sodium chloride, epsomite, mirabilite, and bischofite. Neither solid solutions nor double salts were found. On the basis of Pitzer's semiempirical equation for a mixed aqueous electrolytic solution, the extended HW model (Harvie and Meare) and the temperature-dependent equation were used for fitting the Pitzer single-salt parameters beta((0)), beta((1)), beta((2)), and C-phi for NaCl, MgCl2, Na2SO4, and MgSO4, the mixing ion-interaction parameters theta(Na,Mg), theta(Cl,SO4), Psi(Na,Mg,Cl), Psi(Na,Mg,SO4), Psi(Na,Cl),(SO4), and Psi(Mg,Cl,SO4), and the Debye-Huckel parameter A(phi) in the system at 273.15 K, which are not reported in the literature. In addition, the average equilibrium constants of metastable equilibrium solids at 273.15 K were obtained with the method of the activity product constant. The prediction of solubilities for the reciprocal quaternary system are then demonstrated. A comparison between the calculated and experimental results shows that the predictive solubilities obtained with the extended HW model agree well with experimental data.
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/363002/5835
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, Xining 810008, Peoples R China 2.Chengdu Univ Technol, Coll Mat Chem & Chem Engn, Chengdu 615009, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Deng, Tianlong,Wang, Shiqiang. Metastable Phase Equilibrium in the Reciprocal Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2008,53(12):2723-2727.
APA	Deng, Tianlong,&Wang, Shiqiang.(2008).Metastable Phase Equilibrium in the Reciprocal Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K.JOURNAL OF CHEMICAL AND ENGINEERING DATA,53(12),2723-2727.
MLA	Deng, Tianlong,et al."Metastable Phase Equilibrium in the Reciprocal Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 273.15 K".JOURNAL OF CHEMICAL AND ENGINEERING DATA 53.12(2008):2723-2727.