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

2014Journal article Open access
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dc.contributor.authorPaiva, A. P.
dc.contributor.authorCarvalho, G. I.
dc.contributor.authorCosta, M. Clara
dc.contributor.authorCosta, Ana M. Rosa da
dc.contributor.authorNogueira, Carlos
dc.date.accessioned2014-05-14T14:17:15Z
dc.date.available2014-05-14T14:17:15Z
dc.date.issued2014
dc.description.abstractThe solvent extraction performance of N,N’-dimethyl-N,N’-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.por
dc.identifier.citationPaiva, A.P.; Carvalho, G.I.; Costa, M.C.; Costa, A.M.R. da; Nogueira, C.A. The solvent extraction performance of N,N’-dimethyl-N,N’-dibutylmalonamide towards platinum and palladium in chloride media. In: Separation Science and Technology, 2014, Vol. 49, p. 966-973por
dc.identifier.issn0149-6395
dc.identifier.urihttp://hdl.handle.net/10400.9/2477
dc.language.isoengpor
dc.publisherTaylor & Francispor
dc.relation.publisherversionhttp://dx.doi.org/10.1080/01496395.2013.878721por
dc.subjectPlatinumpor
dc.subjectPalladiumpor
dc.subjectMalonamide derivativespor
dc.subjectSolvent extractionpor
dc.subjectHydrochloric Acidpor
dc.titleThe solvent extraction performance of N,N’-dimethyl-N,N’-dibutylmalonamide towards platinum and palladium in chloride mediapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage973por
oaire.citation.startPage966por
oaire.citation.titleSeparation Science and Technologypor
oaire.citation.volume49por
person.familyNamePaiva
person.familyNameNogueira
person.givenNameAna Paula
person.givenNameCarlos
person.identifier.ciencia-idAB1D-468B-F3E9
person.identifier.ciencia-id011E-FCCD-4FA6
person.identifier.orcid0000-0003-3858-9386
person.identifier.orcid0000-0003-2949-5046
person.identifier.ridA-2064-2008
person.identifier.ridA-4926-2013
person.identifier.scopus-author-id7102683760
person.identifier.scopus-author-id7006686159
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationf31cb44a-7501-4c39-835b-e86aeb4b63a9
relation.isAuthorOfPublicationb4222458-c0fc-4926-9d9a-e3cf9ae1e7e3
relation.isAuthorOfPublication.latestForDiscoveryf31cb44a-7501-4c39-835b-e86aeb4b63a9

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