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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
Source PublicationJOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume53Issue:4Pages:1007-1011
SubtypeArticle
AbstractThe 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 HeadingsScience & Technology ; Physical Sciences ; Technology
WOS KeywordMINERAL SOLUBILITIES ; NATURAL-WATERS ; PREDICTION ; 25-DEGREES-C ; MODEL ; THERMODYNAMICS ; TEMPERATURES ; POTASSIUM
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Engineering, Chemical
WOS IDWOS:000254883400024
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Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5853
Collection青海盐湖研究所知识仓储
Affiliation1.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
Recommended Citation
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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