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Metastable phase equilibrium in the aqueous ternary system (KCl-CaCl2-H2O) at (288.15 and 308.15) K
Deng, Tianlong1,2; Li, Dongchan1,2; Wang, Shiqiang2
2008-04-01
发表期刊JOURNAL OF CHEMICAL AND ENGINEERING DATA
卷号53期号:4页码:1007-1011
文章类型Article
摘要The solubility and the physicochemical properties (density and refractive index) in the liquid-solid metastable system (KCl-CaCl2-H2O) at (288.15 and 308.15) K were determined using the isothermal evaporation method. Based on the experimental data, the metastable phase diagrams and the diagrams of physicochemical properties vs composition in the system at (288.15 and 308.15) K were plotted. In the metastable phase diagrams of the ternary system at (288.15 and 308.15) K, there are in all one invariant point, two univariant curves, and two crystallization zones, corresponding to potassium chloride, antarcticite (CaCl2 center dot 6H(2)O) at 288.15 K, and potassium chloride, and calcium chloride tetrahydrate (CaCl2 center dot 4H(2)O), at 308.15 K. This system at both temperatures belongs to a simple eutectic type, and neither double salts nor solid solution were found. Based on the extended Harvie-Weare (HW) models and temperature-dependent equations at (288.15 and 308.15) K, respectively, the values of the Pitzer parameters (beta((0))), (beta((1))),and C-phi for KCl and CaCl2, the mixed ion-interaction parameters theta(K,Ca) and Psi(K,Ca,Cl), the Debye-Hacket parameter A(phi), and the standard chemical potentials of the minerals in the ternary system were obtained by fitting. Using the temperature-dependent equations and the standard chemical potentials of the minerals respectively, the predictive solubilities for the ternary system at both temperatures are presented. A comparison between the calculated and experimental results at each temperature shows that the predicted solubilities obtained with the extended HW model agree well with experimental data.
WOS标题词Science & Technology ; Physical Sciences ; Technology
关键词[WOS]MINERAL SOLUBILITIES ; NATURAL-WATERS ; PREDICTION ; 25-DEGREES-C ; MODEL ; THERMODYNAMICS ; TEMPERATURES ; POTASSIUM
收录类别SCI
语种英语
WOS研究方向Chemistry ; Engineering
WOS类目Chemistry, Multidisciplinary ; Engineering, Chemical
WOS记录号WOS:000254883400024
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/5853
专题青海盐湖研究所知识仓储
作者单位1.Chengdu Univ Technol, Coll Mat Chem & Chem Engn, Chengdu 610059, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
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GB/T 7714
Deng, Tianlong,Li, Dongchan,Wang, Shiqiang. Metastable phase equilibrium in the aqueous ternary system (KCl-CaCl2-H2O) at (288.15 and 308.15) K[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2008,53(4):1007-1011.
APA Deng, Tianlong,Li, Dongchan,&Wang, Shiqiang.(2008).Metastable phase equilibrium in the aqueous ternary system (KCl-CaCl2-H2O) at (288.15 and 308.15) K.JOURNAL OF CHEMICAL AND ENGINEERING DATA,53(4),1007-1011.
MLA Deng, Tianlong,et al."Metastable phase equilibrium in the aqueous ternary system (KCl-CaCl2-H2O) at (288.15 and 308.15) K".JOURNAL OF CHEMICAL AND ENGINEERING DATA 53.4(2008):1007-1011.
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