Enhancing rare-earth recovery from lamp phosphor waste

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dc.contributor.authorYurramendi, Lourdes
dc.contributor.authorGijsemans, Lukas
dc.contributor.authorForte, Federica
dc.contributor.authorAldana, Jose Luis
dc.contributor.authordel Río, Carmen
dc.contributor.authorBinnemans, Koen
dc.contributor.institutionVALORIZACIÓN DE RESIDUOS
dc.date.issued2019-08
dc.descriptionPublisher Copyright: © 2019 The Authors
dc.description.abstractIn the present work rare-earth recovery was performed from a residue of a hydrometallurgical process based on sulphuric acid leaching of lamp phosphor waste by which the red phosphor Y2O3:Eu3+ was removed for further recovery. The undissolved residue is rich in lanthanum, cerium and the valuable terbium, present as phosphates and aluminates in the green and blue phosphors. The process here proposed is based on an integrated pyro-hydrometallurgical approach involving a thermal treatment (roasting in the presence of sodium carbonate) aimed at converting rare-earth phosphates into oxides, which can be more easily leached by mineral acids (HCl and H2SO4) in a further leaching step. Rare-earth recovery from the leachate was then performed by solvent extraction with the extractant di-(2-ethylhexyl)phosphoric acid, D2EHPA, followed by precipitation with oxalic acid and calcination. 82% Ce, 75% La and 82% Tb were recovered as mixed La2O3 + CeO2 oxide (99% purity) and Tb4O7 (64% purity).en
dc.description.statusPeer reviewed
dc.format.extent7
dc.format.extent747721
dc.identifier.citationYurramendi , L , Gijsemans , L , Forte , F , Aldana , J L , del Río , C & Binnemans , K 2019 , ' Enhancing rare-earth recovery from lamp phosphor waste ' , Hydrometallurgy , vol. 187 , pp. 38-44 . https://doi.org/10.1016/j.hydromet.2019.04.030
dc.identifier.doi10.1016/j.hydromet.2019.04.030
dc.identifier.issn0304-386X
dc.identifier.otherresearchoutputwizard: 11556/714
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85065513201&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofHydrometallurgy
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywordsRare-earth recovery
dc.subject.keywordsLamp phosphor waste
dc.subject.keywordsSodium carbonate roasting
dc.subject.keywordsSolvent extraction
dc.subject.keywordsRare-earth recovery
dc.subject.keywordsLamp phosphor waste
dc.subject.keywordsSodium carbonate roasting
dc.subject.keywordsSolvent extraction
dc.subject.keywordsIndustrial and Manufacturing Engineering
dc.subject.keywordsMetals and Alloys
dc.subject.keywordsMaterials Chemistry
dc.subject.keywordsProject ID
dc.subject.keywordsinfo:eu-repo/grantAgreement/EC/H2020/680629/EU/New Recovery Processes to produce Rare Earth -Magnesium Alloys of High Performance and Low Cost/REMAGHIC
dc.subject.keywordsinfo:eu-repo/grantAgreement/EC/H2020/680629/EU/New Recovery Processes to produce Rare Earth -Magnesium Alloys of High Performance and Low Cost/REMAGHIC
dc.subject.keywordsFunding Info
dc.subject.keywordsThis work has received funding from the European Union's Horizon2020 research and innovation programme under Grant Agreement No.680629 (REMAGHIC: New Recovery Processes to produce Rare Earth-Magnesium Alloys of High Performance and Low Cost) (project website:http://www.remaghic-project.eu/). The authors acknowledge Relightsrl for providing the lamp phosphor powder.
dc.subject.keywordsThis work has received funding from the European Union's Horizon2020 research and innovation programme under Grant Agreement No.680629 (REMAGHIC: New Recovery Processes to produce Rare Earth-Magnesium Alloys of High Performance and Low Cost) (project website:http://www.remaghic-project.eu/). The authors acknowledge Relightsrl for providing the lamp phosphor powder.
dc.titleEnhancing rare-earth recovery from lamp phosphor wasteen
dc.typejournal article
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