Documents disponibles écrits par cet auteur

Coalescence extraction system for rapid efficient and selective separation of zirconium and hafnium / Majid Haji Hosseini in Industrial & engineering chemistry research, Vol. 49 N° 15 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 7068–7073 Titre : Coalescence extraction system for rapid efficient and selective separation of zirconium and hafnium Type de document : texte imprimé Auteurs : Majid Haji Hosseini, Auteur ; Naader Alizadeh, Auteur Année de publication : 2010 Article en page(s) : pp 7068–7073 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Coalescence  Zirconium  Hafnium. Résumé : The coalescence extraction system was developed for rapid, efficient, and selective separation of zirconium and hafnium from an aqueous solution containing alkali, alkaline earth, and transition metal ions. Extraction was based on the coalescence properties of glutaronitrile in combination with the aqueous solution at elevated temperature from a homogeneous solution. In the next step, a significant temperature reduction (temperature-induced phase separation) was used to enter the spinodal to form the two phase’s regions. The particle-size distribution at coalescence temperature was measured by a laser particle-size analyzer. Metal separation could be completed in a single operation lasting only 2 min with the extraction efficiency of more than 90%. The extractability in the coalescence extraction was comparable to that of traditional methods and was feasible for rapid separation of zirconium and hafnium. The mechanism of extraction was proposed depending on the hydrolysis and polymerization of these ions and the temperature of extraction. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901729e [article] Coalescence extraction system for rapid efficient and selective separation of zirconium and hafnium [texte imprimé] / Majid Haji Hosseini, Auteur ; Naader Alizadeh, Auteur . - 2010 . - pp 7068–7073. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 7068–7073 Mots-clés : Coalescence  Zirconium  Hafnium. Résumé : The coalescence extraction system was developed for rapid, efficient, and selective separation of zirconium and hafnium from an aqueous solution containing alkali, alkaline earth, and transition metal ions. Extraction was based on the coalescence properties of glutaronitrile in combination with the aqueous solution at elevated temperature from a homogeneous solution. In the next step, a significant temperature reduction (temperature-induced phase separation) was used to enter the spinodal to form the two phase’s regions. The particle-size distribution at coalescence temperature was measured by a laser particle-size analyzer. Metal separation could be completed in a single operation lasting only 2 min with the extraction efficiency of more than 90%. The extractability in the coalescence extraction was comparable to that of traditional methods and was feasible for rapid separation of zirconium and hafnium. The mechanism of extraction was proposed depending on the hydrolysis and polymerization of these ions and the temperature of extraction. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901729e