[article] 
inIndustrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8314-8322

Titre :	Modeling of solid-liquid equilibrium for the [HAE]Cl-MgCl2-H2O system
Type de document :	texte imprimé
Auteurs :	Junfeng Wang, Auteur ; Shunping Sun, Auteur ; Zhibao Li, Auteur
Année de publication :	2011
Article en page(s) :	pp. 8314-8322
Note générale :	Chimie industrielle
Langues :	Anglais (eng)
Mots-clés :	Phase equilibrium Liquid solid Modeling
Résumé :	The 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·MgCl2·6H2O), which is synthesized by the reaction of aniline hydrochloride ([HAE]Cl) and bischofite (MgCl2·6H2O). 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 thennodynamic basis for the preparation of the [ HAE] Cl·MgCl2·6H2O complex.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=24332157

[article] Modeling of solid-liquid equilibrium for the [HAE]Cl-MgCl2-H2O system [texte imprimé] / Junfeng Wang, Auteur ; Shunping Sun, Auteur ; Zhibao Li, Auteur . - 2011 . - pp. 8314-8322.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8314-8322

Mots-clés :	Phase equilibrium Liquid solid Modeling
Résumé :	The 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·MgCl2·6H2O), which is synthesized by the reaction of aniline hydrochloride ([HAE]Cl) and bischofite (MgCl2·6H2O). 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 thennodynamic basis for the preparation of the [ HAE] Cl·MgCl2·6H2O complex.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=24332157