The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride

Simple item page
dc.contributor.advisorKoch, Klaus Ren_ZA
dc.contributor.authorBrackenbury, Karim Francis Gavinen_ZA
dc.date.accessioned2016-04-01T06:56:12Z
dc.date.available2016-04-01T06:56:12Z
dc.date.issued1984en_ZA
dc.description.abstractA preliminary investigation prior to the study of the extraction of platinum, was conducted on the Co(NCS)₄²⁻ /foam system to, (a) develop a suitable experimental apparatus in order to study the loading of platinum foams and (b) obtain fundamental kinetic and thermodynamic data concerning the sorption process. The sorption of platinum(II) as complexes of [Pt(SnCl₃)nCl₄-n]²⁻ and [Pt(SnCl₃)₅]³⁻ from hydrochloric acid solutions by polyurethane foams was examined in detail. Our studies show that the capacity of the foam to extract platinum depends on the following solution conditions of, temperature, initial platinum concentration, hydrochloric acid and hydrogen ion concentrations, the Sn:Pt ratio and the presence of interfering cations and anions. The rate of platinum sorption is shown to be dependent on temperature, initial platinum concentration, the Sn:Pt ratio and the mass of the foam. The foam's ability to selectively extract platinum from solutions containing platinum and certain base metals is examined. Results obtained show that in all cases almost complete extraction of platinum was achieved. Of all the base metals investigated only Cu(II) co-extracts to a small extent with the noble metal. In this work a procedure has been developed in which we are able to quantitatively recover both platinum and tin from loaded foams, by dissolving the polyurethane in warm nitric acid. A simple distillation allows for the satisfactory separation of platinum from tin.en_ZA
dc.identifier.apacitationBrackenbury, K. F. G. (1984). <i>The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/18488en_ZA
dc.identifier.chicagocitationBrackenbury, Karim Francis Gavin. <i>"The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1984. http://hdl.handle.net/11427/18488en_ZA
dc.identifier.citationBrackenbury, K. 1984. The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Brackenbury, Karim Francis Gavin AB - A preliminary investigation prior to the study of the extraction of platinum, was conducted on the Co(NCS)₄²⁻ /foam system to, (a) develop a suitable experimental apparatus in order to study the loading of platinum foams and (b) obtain fundamental kinetic and thermodynamic data concerning the sorption process. The sorption of platinum(II) as complexes of [Pt(SnCl₃)nCl₄-n]²⁻ and [Pt(SnCl₃)₅]³⁻ from hydrochloric acid solutions by polyurethane foams was examined in detail. Our studies show that the capacity of the foam to extract platinum depends on the following solution conditions of, temperature, initial platinum concentration, hydrochloric acid and hydrogen ion concentrations, the Sn:Pt ratio and the presence of interfering cations and anions. The rate of platinum sorption is shown to be dependent on temperature, initial platinum concentration, the Sn:Pt ratio and the mass of the foam. The foam's ability to selectively extract platinum from solutions containing platinum and certain base metals is examined. Results obtained show that in all cases almost complete extraction of platinum was achieved. Of all the base metals investigated only Cu(II) co-extracts to a small extent with the noble metal. In this work a procedure has been developed in which we are able to quantitatively recover both platinum and tin from loaded foams, by dissolving the polyurethane in warm nitric acid. A simple distillation allows for the satisfactory separation of platinum from tin. DA - 1984 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1984 T1 - The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride TI - The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride UR - http://hdl.handle.net/11427/18488 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18488
dc.identifier.vancouvercitationBrackenbury KFG. The use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chloride. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1984 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18488en_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.titleThe use of polyurethane foams for the extraction of platinum (II) from hydrochloric acid solutions in the presence of tin (II) chlorideen_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
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1984_brackenbury_karim_francis_gavin.pdf
Size:
1.67 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters