Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam

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dc.contributor.advisorKoch, Klausen_ZA
dc.contributor.authorJones, Lynnen_ZA
dc.date.accessioned2016-03-11T14:28:16Z
dc.date.available2016-03-11T14:28:16Z
dc.date.issued1987en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThe potentially quantitative and selective sorption of chloro-(trichlorostannato)-platinum(II) and -rhodium (III/I) complex anions by polyurethane foams has been examined. Quantitative separation of platinum(II) from iridium and ruthenium has been achieved. Rhodium( III) is similarly sorbed by polyurethane foam in the presence of sufficient tin(II) chloride and-its clean separation from iridium has been achieved using this method. Ruthenium, although not significantly sorbed under the same conditions as platinum and rhodium, appears to inhibit the extraction of the rhodium(III/I)-tin(II) species. A procedure has been developed for the quantitative recovery of both platinum and rhodium. The polyurethane foams are dissolved in hot nitric acid, followed by flame AAS. Near-quantitative recovery of these metals has been achieved by means of foam stripping using a suitable eluent. The rate of formation of the chloro-(trichlorostannato)platinum( II) complex anions is rapid when PtCl₄²⁻ is treated with an excess of tin( II) chloride. On the other hand, the reaction of cis-Pt(NH₃)₂Cl₂ with stannous chloride is very slow and forcing conditions are required to achieve quantitative sorption of the platinum(II)-tin( II) species by polyurethane foams for this complex The potential of the foam to selectively extract platinum from solutions containing certain base metals was studied. Results obtained show that in all cases complete extraction of platinum was achieved. Of the base metals investigated, namely Fe( III), Co( II), Ni(II), Cu(II) and Zn(II), only copper(II) co-extracts to a small extent with the noble metal.en_ZA
dc.identifier.apacitationJones, L. (1987). <i>Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/17661en_ZA
dc.identifier.chicagocitationJones, Lynn. <i>"Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1987. http://hdl.handle.net/11427/17661en_ZA
dc.identifier.citationJones, L. 1987. Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Jones, Lynn AB - The potentially quantitative and selective sorption of chloro-(trichlorostannato)-platinum(II) and -rhodium (III/I) complex anions by polyurethane foams has been examined. Quantitative separation of platinum(II) from iridium and ruthenium has been achieved. Rhodium( III) is similarly sorbed by polyurethane foam in the presence of sufficient tin(II) chloride and-its clean separation from iridium has been achieved using this method. Ruthenium, although not significantly sorbed under the same conditions as platinum and rhodium, appears to inhibit the extraction of the rhodium(III/I)-tin(II) species. A procedure has been developed for the quantitative recovery of both platinum and rhodium. The polyurethane foams are dissolved in hot nitric acid, followed by flame AAS. Near-quantitative recovery of these metals has been achieved by means of foam stripping using a suitable eluent. The rate of formation of the chloro-(trichlorostannato)platinum( II) complex anions is rapid when PtCl₄²⁻ is treated with an excess of tin( II) chloride. On the other hand, the reaction of cis-Pt(NH₃)₂Cl₂ with stannous chloride is very slow and forcing conditions are required to achieve quantitative sorption of the platinum(II)-tin( II) species by polyurethane foams for this complex The potential of the foam to selectively extract platinum from solutions containing certain base metals was studied. Results obtained show that in all cases complete extraction of platinum was achieved. Of the base metals investigated, namely Fe( III), Co( II), Ni(II), Cu(II) and Zn(II), only copper(II) co-extracts to a small extent with the noble metal. DA - 1987 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1987 T1 - Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam TI - Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam UR - http://hdl.handle.net/11427/17661 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17661
dc.identifier.vancouvercitationJones L. Selective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foam. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1987 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17661en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleSelective preconcentration of platinum and rhodium from hydrochloric acid media containing tin (II) chloride using polyurethane foamen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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