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Preparation of anhydrous magnesium chloride from magnesia / Zhimin Zhang in Industrial & engineering chemistry research, Vol. 51 N° 29 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9713–9718 Titre : Preparation of anhydrous magnesium chloride from magnesia Type de document : texte imprimé Auteurs : Zhimin Zhang, Auteur ; Xuchen Lu, Auteur ; Suping Yang, Auteur Année de publication : 2012 Article en page(s) : pp. 9713–9718 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Magnesium  Chloride Résumé : High-purity anhydrous magnesium chloride was prepared by using magnesia and ammonium chloride as reactants, alumina as covering agent. The process was characterized by X-ray diffraction and thermogravimetric and differential scanning calorimetry analysis. The reaction mechanism involved in the process was proposed and discussed. In addition, the effects of molar ratio of ammonium chloride to magnesia, thickness of the covering agent (alumina), reaction temperature, and reaction time on the purity of anhydrous magnesium chloride were investigated. The content of magnesia in anhydrous magnesium chloride was achieved 0.014% under the optimum conditions: ammonium chloride and magnesia with the molar ratio of NH4Cl:MgO = 5:1 were mixed evenly. Alumina with the thickness of 1.1 cm was used as a covering agent. The mixture was maintained at 450 °C for 1.5 h for the complete reaction, and then calcined at 700 °C for 0.5 h to obtain well-sintered anhydrous magnesium chloride. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300765u [article] Preparation of anhydrous magnesium chloride from magnesia [texte imprimé] / Zhimin Zhang, Auteur ; Xuchen Lu, Auteur ; Suping Yang, Auteur . - 2012 . - pp. 9713–9718. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9713–9718 Mots-clés : Magnesium  Chloride Résumé : High-purity anhydrous magnesium chloride was prepared by using magnesia and ammonium chloride as reactants, alumina as covering agent. The process was characterized by X-ray diffraction and thermogravimetric and differential scanning calorimetry analysis. The reaction mechanism involved in the process was proposed and discussed. In addition, the effects of molar ratio of ammonium chloride to magnesia, thickness of the covering agent (alumina), reaction temperature, and reaction time on the purity of anhydrous magnesium chloride were investigated. The content of magnesia in anhydrous magnesium chloride was achieved 0.014% under the optimum conditions: ammonium chloride and magnesia with the molar ratio of NH4Cl:MgO = 5:1 were mixed evenly. Alumina with the thickness of 1.1 cm was used as a covering agent. The mixture was maintained at 450 °C for 1.5 h for the complete reaction, and then calcined at 700 °C for 0.5 h to obtain well-sintered anhydrous magnesium chloride. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300765u