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Modeling of Solid-Liquid Equilibrium for the [HAE]Cl-MgCl2-H2O System
Wang, Junfeng; Sun, Shunping; Li, Zhibao; Li, ZB
2011-07-06
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume50Issue:13Pages:8314-8322
AbstractThe study of the solid-liquid phase equilibrium for the [HAE]Cl-MgCl2-H2O system is of significance for the preparation of anhydrous magnesium chloride using the thermal decomposition of the complex ([HAE]Cl center dot MgCl2 center dot 6H(2)O), which is synthesized by the reaction of aniline hydrochloride ([HAE]Cl) and bischofite (MgCl2 center dot 6H(2)O). In this study, a rigorous and thermodynamically consistent representation for the [HAE]Cl-MgCl2-H2O system was developed on the basis of the electrolyte nonrandom two-liquid (ENRTL) activity coefficient model embedded in Aspen Plus. The solubility of [HAE]Cl in water and magnesium chloride solutions over the temperature range from 277 to 370 K was measured by use of the dynamic method. With the equilibrium constant of [HAE]Cl obtained using experimental solubility of [HAE]Cl in water and the phase equilibrium equation, the new ENRTL parameters were obtained by regressing the solubility data for the two binary systems [HAE]Cl-H2O and MgCl2-H2O and the one ternary system [HAE]Cl-MgCl2-H2O at MgCl2 concentrations of 0.51 and 2.17 mol.kg(-1). These obtained parameters could accurately predict the solubility for the ternary [HAE]Cl-MgCl2-H2O system at MgCl2 concentrations of 1.05, 1.56, 2.72, 3.21, 3.87, 4.32, and 5.05 mol.kg(-1). The values at multiple saturated points at 298.15 and 323.15 K were accurately predicted with help of the newly developed model. The behavior of the ternary [HAE]Cl-MgCl2-H2O system at the two temperatures are successfully visualized with lucidity on an equilateral triangle. All of these will provide a thermodynamic basis for the preparation of the [HAE]Cl center dot MgCl2 center dot 6H(2)O complex.
KeywordLocal Composition Model Excess Gibbs Energy Electrolyte Systems Calcium-sulfate Chemical-model Solubility Chloride Thermodynamics
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie102483q
Indexed BySCI
Language英语
WOS KeywordLOCAL COMPOSITION MODEL ; EXCESS GIBBS ENERGY ; ELECTROLYTE SYSTEMS ; CALCIUM-SULFATE ; CHEMICAL-MODEL ; SOLUBILITY ; CHLORIDE ; THERMODYNAMICS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000292069000066
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4855
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorLi, ZB
AffiliationChinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang, Junfeng,Sun, Shunping,Li, Zhibao,et al. Modeling of Solid-Liquid Equilibrium for the [HAE]Cl-MgCl2-H2O System[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2011,50(13):8314-8322.
APA Wang, Junfeng,Sun, Shunping,Li, Zhibao,&Li, ZB.(2011).Modeling of Solid-Liquid Equilibrium for the [HAE]Cl-MgCl2-H2O System.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,50(13),8314-8322.
MLA Wang, Junfeng,et al."Modeling of Solid-Liquid Equilibrium for the [HAE]Cl-MgCl2-H2O System".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 50.13(2011):8314-8322.
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