Study of the rare earth elements fractionation by solvent extraction

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dc.contributor.authorMIRANDA JUNIOR, P.pt_BR
dc.contributor.authorMADUAR, M.F.pt_BR
dc.contributor.authorVICENTINI, G.pt_BR
dc.contributor.authorZINNER, L.B.pt_BR
dc.contributor.authorMORAES, N.M.P.pt_BR
dc.contributor.authorSHIHOMATSU, H.M.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoRARE EARTHS'2001pt_BR
dc.date.accessioned2014-11-17T18:11:55Zpt_BR
dc.date.accessioned2014-11-18T18:07:24Zpt_BR
dc.date.accessioned2015-04-02T06:01:55Z
dc.date.available2014-11-17T18:11:55Zpt_BR
dc.date.available2014-11-18T18:07:24Zpt_BR
dc.date.available2015-04-02T06:01:55Z
dc.date.eventoSept. 22-26, 2001pt_BR
dc.description.abstractThe influence of the acidity and concentration of the rare earth elements (REE) in aqueous phase, the organic/aqueous phase ratio and the HCl concentration in stripping was estimated for the REE fractionation by solvent extraction. The assays were performed in batch 21 tests by using 2-ethylhexylphosphonic acid, mono-2-ethylhexyl ester, diluted in isododecane (1 mol l ). The solution studied presented a 21 21 REE concentration of 16.54 g l (Nd 4.84%, Sm 61.36%, Eu 1.75%, and Gd 32.05%) in 0.77 mol l hydrochloric medium. In order to control the analytical parameters (acidity and concentration of REE) in the aqueous solutions generated by the separation stages of the batch tests, a high-performance liquid chromatography (HPLC) technique was employed. The REE were separated from each other with a-hydroxyisobutyric acid as eluent and n-octane sodium sulphonate as modifying agent, in a C reverse phase column. Eluted REE were 18 monitored at 520 nm by a spectrophotometer after a post-column reaction with 4-(2-pyridylazo)resorcinol. Results are reported as extraction profiles and a chromatogram. For the studied parameters, it was found that, in lower acidity and concentration solutions, higher extraction percentages for the REE are obtained. In all assays, Gd and Eu were preferably extracted.
dc.format.extent46-50pt_BR
dc.identifier.citationMIRANDA JUNIOR, P.; MADUAR, M.F.; VICENTINI, G.; ZINNER, L.B.; MORAES, N.M.P.; SHIHOMATSU, H.M. Study of the rare earth elements fractionation by solvent extraction: use of HPLC as an analytical control technique. In: RARE EARTHS'2001, Sept. 22-26, 2001, Campos do Jordao, SP. <b>Proceedings...</b> p. 46-50. Disponível em: http://repositorio.ipen.br/handle/123456789/16304.
dc.identifier.orcidhttps://orcid.org/0000-0002-4448-003X
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/16304pt_BR
dc.local.eventoCampos do Jordao, SPpt_BR
dc.rightsopenAccesspt_BR
dc.sourcePublicado em: J. Alloys Compd., , v. 344, n. 1/2, p. 46-50, 2002pt_BR
dc.subjectrare earthspt_BR
dc.subjectsolvent extractionpt_BR
dc.subjectphosphonic acidspt_BR
dc.subjecthigh-performance liquid chromatographypt_BR
dc.titleStudy of the rare earth elements fractionation by solvent extractionpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorHELENA MIHO SHIHOMATSU
ipen.autorNOEMIA MARIA PEREIRA DE MORAES
ipen.autorMARCELO FRANCIS MADUAR
ipen.codigoautor1508
ipen.codigoautor1491
ipen.codigoautor766
ipen.contributor.ipenauthorHELENA MIHO SHIHOMATSU
ipen.contributor.ipenauthorNOEMIA MARIA PEREIRA DE MORAES
ipen.contributor.ipenauthorMARCELO FRANCIS MADUAR
ipen.date.recebimento03-03pt_BR
ipen.event.datapadronizada2001pt_BR
ipen.identifier.ipendoc08609pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationd123930d-dc40-46d3-a366-16250f112b9c
relation.isAuthorOfPublicationd2d54b4b-f405-42b1-a47c-a7d3a30fff76
relation.isAuthorOfPublicationd1f31f36-41a6-454e-b032-2d816cd74987
relation.isAuthorOfPublication.latestForDiscoveryd1f31f36-41a6-454e-b032-2d816cd74987
sigepi.autor.atividadeMADUAR, M.F.:766:25:Npt_BR
sigepi.autor.atividadeMORAES, N.M.P.:1491:-1:Npt_BR
sigepi.autor.atividadeSHIHOMATSU, H.M.:1508:36:Npt_BR
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