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Recovery of platinum and palladium from chloride solutions by a thiodiglycolamide derivative

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.accessioned2014-05-14T14:44:44Z
dc.date.available2014-05-14T14:44:44Z
dc.date.issued2014
dc.description.abstractThe liquid-liquid extraction of platinum(IV) and palladium(II) from hydrochloric acid media was carried out using N,N’-dimethyl-N,N’-dicyclohexylthiodiglycolamide (DMDCHTDGA) in 1,2-dichloroethane (1,2-DCE). Pt(IV) is efficiently extracted from 5 M HCl onwards (%E = 97%), whereas Pd(II) is quantitatively recovered from 1 to 8 M HCl solutions. Both Pt(IV) and Pd(II) can be successfully stripped from the loaded organic phases, the former with a 1 M HCl solution, the latter with 0.1 M thiourea in 1 M HCl. The maximum loading capacity of DMDCHTDGA for Pt(IV) could not be determined but it is high, since molar ratios extractant:Pt(IV) within 2 and 3 have been achieved. Data obtained from successive extraction-stripping cycles suggest a good stability profile of DMDCHTDGA towards Pt(IV) recovery. Attempts to replace 1,2-DCE by more environmentally-friendly diluents showed, in general, comparable %E for Pt(IV). The study of the influence of acidity, as well as chloride ion and DMDCHTDGA concentrations, allows a proposal for the composition of the Pt(IV) species formed upon extraction. Results obtained with binary metal ion solutions point out that Pt(IV) and Pd(II) can be efficiently separated from DMDCHTDGA loaded organic phases through sequential selective stripping.por
dc.identifier.citationPaiva, A.P.; Carvalho, G.I.; Costa, M.C.; Costa, A.M.R. da; Nogueira, C. Recovery of platinum and palladium from chloride solutions by a thiodiglycolamide derivative. In:Solvent Extraction and Ion Exchange, 2014, Vol. 32, p. 78-94por
dc.identifier.issn0736-6299
dc.identifier.urihttp://hdl.handle.net/10400.9/2478
dc.language.isoengpor
dc.publisherTaylor & Francispor
dc.relation.publisherversionhttp://dx.doi.org/10.1080/07366299.2013.810969por
dc.subjectPlatinumpor
dc.subjectPalladiumpor
dc.subjectThiodiglycolamide derivativepor
dc.subjectLiquid-liquid extractionpor
dc.subjectHydrochloric Acidpor
dc.titleRecovery of platinum and palladium from chloride solutions by a thiodiglycolamide derivativepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage94por
oaire.citation.startPage78por
oaire.citation.titleSolvent Extraction and Ion Exchangepor
oaire.citation.volume32por
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.latestForDiscoveryb4222458-c0fc-4926-9d9a-e3cf9ae1e7e3

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