Selective extraction of palladium(II) from chloride solutions with nonylthiourea dissolved in chloroform
2002 (English)In: Solvent extraction and ion exchange, ISSN 0736-6299, E-ISSN 1532-2262, Vol. 20, no 6, 717-733 p.Article in journal (Refereed) Published
The extraction of Palladium(II) [Pd(II)] from hydrochloric acid solutions with nonylthiourea (NTH) dissolved in chloroform at a constant ionic strength of LOM has been studied. The extraction of Pd(II) has been investigated as a function of the concentration of the extractant, chloride ion, and proton concentrations as well as extraction temperature. The distribution data have been treated graphically and numerically. The analysis of the experimental data has shown that Pd(II) is extracted as PdCl2 . (NTH) and PdCl2 . (NTH)(2) species with the respective extraction constants of log K-11 = 5.0 +/- 0.1 and log K-12 = 9.1 +/- 0.1. The back-extraction of Pd(II) from the organic phase using different stripping reagents has been examined. The selectivity of NTH for Pd(II) against Pt(IV), Rb(III), Cu(II), Fe(III), and Zn(II) has also been investigated.
Place, publisher, year, edition, pages
2002. Vol. 20, no 6, 717-733 p.
liquid-liquid-extraction, solvent-extraction, hydrochloric-acid, platinum metals, noble-metals, sulfide, gold, separation, thiourea, reagents
IdentifiersURN: urn:nbn:se:kth:diva-22108DOI: 10.1081/sei-120016075ISI: 000179678100006OAI: oai:DiVA.org:kth-22108DiVA: diva2:340806
QC 201005252010-08-102010-08-102010-09-24Bibliographically approved