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Extraction of germanium by the AOT microemulsion with N235 system / Fei Liu in Industrial & engineering chemistry research, Vol. 49 N° 20 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 10005–10008 Titre : Extraction of germanium by the AOT microemulsion with N235 system Type de document : texte imprimé Auteurs : Fei Liu, Auteur ; Yanzhao Yang, Auteur ; Yanmin Lu, Auteur Année de publication : 2011 Article en page(s) : pp. 10005–10008 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microemulsion Résumé : The extraction of germanium to a W/O microemulsion by the combination with an anionic surfactant and an amine extractant was studied. In the AOT/n-butanol/n-heptane/Na2SO4/N235 system, AOT was used as an anionic surfactant to form a microemulsion in n-heptane, n-butanol was injected in the microemulsion as a cosurfactant to enhance the stability, and N235 was a typical extractant in the system. The microemulsion system without N235 showed poor extractability and stability. However, by adding N235, the extraction efficiency (E%) can be more than 99%, and the stability of the microemulsion extremely enhanced. The influences of the concentration of cosurfactant, temperature, pH of the feed solution, and composition of the feed solution on the extraction efficiency (E%) were verified. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100963t [article] Extraction of germanium by the AOT microemulsion with N235 system [texte imprimé] / Fei Liu, Auteur ; Yanzhao Yang, Auteur ; Yanmin Lu, Auteur . - 2011 . - pp. 10005–10008. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 10005–10008 Mots-clés : Microemulsion Résumé : The extraction of germanium to a W/O microemulsion by the combination with an anionic surfactant and an amine extractant was studied. In the AOT/n-butanol/n-heptane/Na2SO4/N235 system, AOT was used as an anionic surfactant to form a microemulsion in n-heptane, n-butanol was injected in the microemulsion as a cosurfactant to enhance the stability, and N235 was a typical extractant in the system. The microemulsion system without N235 showed poor extractability and stability. However, by adding N235, the extraction efficiency (E%) can be more than 99%, and the stability of the microemulsion extremely enhanced. The influences of the concentration of cosurfactant, temperature, pH of the feed solution, and composition of the feed solution on the extraction efficiency (E%) were verified. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100963t

Microemulsion extraction of gold(III) from hydrochloric acid medium using ionic liquid as surfactant and extractant / Yu Tong in Industrial & engineering chemistry research, Vol. 51 N° 50 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp. 16438–16443 Titre : Microemulsion extraction of gold(III) from hydrochloric acid medium using ionic liquid as surfactant and extractant Type de document : texte imprimé Auteurs : Yu Tong, Auteur ; Lu Han, Auteur ; Yanzhao Yang, Auteur Année de publication : 2013 Article en page(s) : pp. 16438–16443 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Microemulsion  Ionic  Liquid Résumé : A microemulsion consisting of cyclohexane, n-hexanol, hydrochloric acid solution, and the ionic liquid 1-n-tetradecyl-3-methylimidazolium bromide ([C14mim]Br) was investigated for Au(III) extraction. In the extraction system, [C14mim]Br bears double functions of surfactant and extractant. The anion-exchange mechanism of Au(III) extraction by [C14mim]Br was confirmed by the method of continuous variation and infrared spectrum analysis. The effects of extraction time and various material concentrations were examined for Au(III) extraction. Under optimum conditions, almost all the Au(III) in hydrochloric acid solution was extracted to the microemulsion phase, which also has high selectivity for Au(III) over some metals (Cu(II), Cd(II), Co(II), Ni(II), Sb(III), Fe(III), Al(III), and Sn(IV)). Therefore, the extraction of Au(III) by the [C14mim]Br/cyclohexane/n-hexanol/HCl microemulsion is an efficient and effective approach with high selectivity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301644t [article] Microemulsion extraction of gold(III) from hydrochloric acid medium using ionic liquid as surfactant and extractant [texte imprimé] / Yu Tong, Auteur ; Lu Han, Auteur ; Yanzhao Yang, Auteur . - 2013 . - pp. 16438–16443. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp. 16438–16443 Mots-clés : Microemulsion  Ionic  Liquid Résumé : A microemulsion consisting of cyclohexane, n-hexanol, hydrochloric acid solution, and the ionic liquid 1-n-tetradecyl-3-methylimidazolium bromide ([C14mim]Br) was investigated for Au(III) extraction. In the extraction system, [C14mim]Br bears double functions of surfactant and extractant. The anion-exchange mechanism of Au(III) extraction by [C14mim]Br was confirmed by the method of continuous variation and infrared spectrum analysis. The effects of extraction time and various material concentrations were examined for Au(III) extraction. Under optimum conditions, almost all the Au(III) in hydrochloric acid solution was extracted to the microemulsion phase, which also has high selectivity for Au(III) over some metals (Cu(II), Cd(II), Co(II), Ni(II), Sb(III), Fe(III), Al(III), and Sn(IV)). Therefore, the extraction of Au(III) by the [C14mim]Br/cyclohexane/n-hexanol/HCl microemulsion is an efficient and effective approach with high selectivity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301644t