Extraction of platinum(IV) with nonylthiourea dissolved in chloroform from hydrochloric acid media
2003 (English)In: Solvent extraction and ion exchange, ISSN 0736-6299, E-ISSN 1532-2262, Vol. 21, no 6, 827-840 p.Article in journal (Refereed) Published
The extractant nonylthiourea (NTH) in chloroform has been investigated for the extraction of Pt(IV) from chloride solutions at ionic strength of I = 4.0 M and at 22degreesC. It has been found that chloride concentration has a negative effect on the extraction equilibrium, while proton concentration has no effect. The numerical analysis of the equilibrium data has shown that the extraction of PtCl62- with NTH can be interpreted by the formation Of PtCl4(NTH) and PtCl4(NTH)(4) species with their respective equilibrium constants of log K-11 = 5.06 +/- 0.01 and log K-14 = 14.12 +/- 0.04 in 4 M HCl. FTIR spectra of the free NTH and the NTH-Pt(IV) complex were studied to obtain some information on the interaction between Pt(IV) ions and NTH molecules.
Place, publisher, year, edition, pages
2003. Vol. 21, no 6, 827-840 p.
di-ortho-tolylthiourea, solvent-extraction, group-metals, gold, complexes, thiourea, diphenylthiourea, derivatives, separation, palladium
IdentifiersURN: urn:nbn:se:kth:diva-22981DOI: 10.1081/sei-120025927ISI: 000186740800004OAI: oai:DiVA.org:kth-22981DiVA: diva2:341679
QC 201005252010-08-102010-08-102010-09-24Bibliographically approved