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Recovery of zinc from an industrial zinc leach residue by solvent extraction using D2EHPA / E. Vahidi in Minerals engineering, Vol. 22 N° 2 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 204–206 Titre : Recovery of zinc from an industrial zinc leach residue by solvent extraction using D2EHPA Type de document : texte imprimé Auteurs : E. Vahidi, Auteur ; F. Rashchi, Auteur ; D. Moradkhani, Auteur Année de publication : 2009 Article en page(s) : pp. 204–206 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Zinc  leach  residue  Solvent  extraction  D2EHPA Index. décimale : 622 Industrie minière Résumé : A hydrometallurgical treatment involving solvent extraction of zinc using di-2-ethylhexyl phosphoric acid (D2EHPA) has been investigated to recover zinc from an industrial leach residue. The residue was leached with sulfuric acid producing leach liquor which was subjected to solvent extraction for enrichment of zinc and removal of impurities. Operating variables, such as pH, D2EHPA concentration, temperature, aqueous/organic (A/O) phase ratio, tri-butyl phosphate (TBP) concentration and sodium sulfate (Na2SO4) concentration in aqueous phase were studied. Practically, all zinc was extracted from the aqueous solution at pH 2.5 with 20% w/w D2EHPA in kerosene. Increasing either TBP concentration up to 5%, or Na2SO4 concentration up to 0.2 M, increased the zinc extraction. Zinc could be extracted at one theoretical stage at A/O of 1/1, as calculated by McCabe–Thiele method. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001258 [article] Recovery of zinc from an industrial zinc leach residue by solvent extraction using D2EHPA [texte imprimé] / E. Vahidi, Auteur ; F. Rashchi, Auteur ; D. Moradkhani, Auteur . - 2009 . - pp. 204–206. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 204–206 Mots-clés : Zinc  leach  residue  Solvent  extraction  D2EHPA Index. décimale : 622 Industrie minière Résumé : A hydrometallurgical treatment involving solvent extraction of zinc using di-2-ethylhexyl phosphoric acid (D2EHPA) has been investigated to recover zinc from an industrial leach residue. The residue was leached with sulfuric acid producing leach liquor which was subjected to solvent extraction for enrichment of zinc and removal of impurities. Operating variables, such as pH, D2EHPA concentration, temperature, aqueous/organic (A/O) phase ratio, tri-butyl phosphate (TBP) concentration and sodium sulfate (Na2SO4) concentration in aqueous phase were studied. Practically, all zinc was extracted from the aqueous solution at pH 2.5 with 20% w/w D2EHPA in kerosene. Increasing either TBP concentration up to 5%, or Na2SO4 concentration up to 0.2 M, increased the zinc extraction. Zinc could be extracted at one theoretical stage at A/O of 1/1, as calculated by McCabe–Thiele method. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001258