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The solvent extraction performance of N,Nā€™-dimethyl-N,Nā€™-dibutylmalonamide towards platinum and palladium in chloride media

2014Journal article Restricted access
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dc.contributor.authorPaiva, Ana Paula
dc.contributor.authorCarvalho, GonƧalo Ivo
dc.contributor.authorCosta, Maria Clara
dc.contributor.authorCosta, Ana M. Rosa da
dc.contributor.authorNogueira, Carlos
dc.date.accessioned2016-01-06T15:20:31Z
dc.date.available2016-01-06T15:20:31Z
dc.date.issued2014
dc.description.abstractThe solvent extraction performance of N,Nā€™-dimethyl-N,Nā€™- dibutylmalonamide (DMDBMA) in 1,2-dichloroethane (1,2-DCE) towards platinum(IV) and palladium(II) in hydrochloric acid media was systematically evaluated. Pt(IV) extraction (%E) increases with the HCl concentration in the aqueous phases, being always higher than 72%, whereas Pd(II) extraction decreases from 65% at 1 M HCl to 22% at 8 M HCl. Several stripping agents for the two metals were tested: Pt(IV) is successfully recovered by a 1 M sodium thiosulfate solution, whereas the best result for Pd(II) was achieved with 0.1Mthiourea in 1MHCl. The loading capacity of DMDBMA for Pt(IV) is high, and data obtained from successive extraction-stripping cycles suggest a good DMDBMA stability pattern. Attempts to replace 1,2-DCE by more environmentally- friendly diluents showed, in general, worse %E for Pt(IV). The dependence of Pt(IV) distribution coefficients on DMDBMA and chloride ion concentrations, as well as on acidity, are the basis of a proposal for the composition of Pt(IV) extracted species.pt_PT
dc.identifier.citationSeparation Science and Technology, 49, 966ā€“973, 2014pt_PT
dc.identifier.doihttp://dx.doi.org/10.1080/01496395.2013.878721pt_PT
dc.identifier.issn0149-6395
dc.identifier.otherAUT: AMC01695; MCO01181;
dc.identifier.urihttp://hdl.handle.net/10400.1/7389
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.relation.publisherversionhttp://www.tandfonline.com/doi/pdf/10.1080/01496395.2013.878721pt_PT
dc.subjectPlatinumpt_PT
dc.subjectPalladiumpt_PT
dc.subjectN,Nā€™-tetrasubstituted malonamide derivativept_PT
dc.subjectSolvent extractionpt_PT
dc.subjectHydrochloric acidpt_PT
dc.titleThe solvent extraction performance of N,Nā€™-dimethyl-N,Nā€™-dibutylmalonamide towards platinum and palladium in chloride mediapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FQUI-QUI%2F109970%2F2009/PT
oaire.citation.endPage973pt_PT
oaire.citation.issue7pt_PT
oaire.citation.startPage966pt_PT
oaire.citation.titleSeparation Science and Technologypt_PT
oaire.citation.volume49pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameCosta
person.familyNameRosa da Costa
person.givenNameMaria Clara
person.givenNameAna M
person.identifier305029
person.identifier.ciencia-id7110-A28E-3C8A
person.identifier.ciencia-idA418-A85E-5DB1
person.identifier.orcid0000-0003-1340-5237
person.identifier.orcid0000-0003-0225-9537
person.identifier.ridM-6189-2013
person.identifier.ridE-2165-2012
person.identifier.scopus-author-id35354952400
person.identifier.scopus-author-id53986075100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication11c29f10-6e2b-40d8-9c74-2cc45be6d7a7
relation.isAuthorOfPublication0ca8c16f-6881-4662-bafc-cc51c5ce8d88
relation.isAuthorOfPublication.latestForDiscovery0ca8c16f-6881-4662-bafc-cc51c5ce8d88
relation.isProjectOfPublicatione6818a69-8b2b-461c-b1d1-6b70bec8b2d7
relation.isProjectOfPublication.latestForDiscoverye6818a69-8b2b-461c-b1d1-6b70bec8b2d7

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