AN INVESTIGATION ON THE EXTRACTION OF RHODIUM FROM AQUEOUS CHLORIDE SOLUTIONS WITH 7-SUBSTITUTED 8-HYDROXYQUINOLINES
- 1 June 1994
- journal article
- research article
- Published by Taylor & Francis in Solvent Extraction and Ion Exchange
- Vol. 12 (3) , 497-516
- https://doi.org/10.1080/07366299408918221
Abstract
The extraction of Rh(III) from chloride solutions with 2 different 7-substituted 8-hydroxyquinoline (R-HQ) reagents was studied. Rh(III) was found to be extracted, to a limited degree, via an ion-pair involving the anionic hexachloro species of Rh(III), RhCl6 3−, and the protonated extractant. Through computer simulation of the extraction equilibria for one extractant, TN 1911, an extraction constant of log Kex= 5.8 was determined. The effect of age, contact time, [HCI], [CI−], [H+], and [SO4 2] on the extraction of Rh(III) with R-HQ reagents is reported.Keywords
This publication has 7 references indexed in Scilit:
- NEW 8-HYDROXYQUINOUNE DERIVATIVE EXTRACTANTS FOR PLATINUM GROUP METAL SEPARATION PART 1: CHARACTERIZATION AND HCl XTRACTIONSolvent Extraction and Ion Exchange, 1993
- Ion exchange in concentrated media. Correlations for variation of selectivity coefficients with mediumReactive Polymers, 1992
- Hydrolytic polymerization of rhodium(III). 1. Preparation, solution studies, and x-ray structure of the doubly bridged dimer [(H2O)4Rh(.mu.-OH)2Rh(OH2)4](dmtos)4.cntdot.8H2OInorganic Chemistry, 1991
- Estimation of ionic activities in chloride systems at ambient and elevated temperaturesHydrometallurgy, 1983
- Kinetics of cobalt oxidation in solvent extraction by 8-quinolinol and Kelex 100Journal of Inorganic and Nuclear Chemistry, 1980
- Kinetics of aquation of aquopentachlororhodium(III) and chloride anation of diaquotetrachlororhodium(III) anionsInorganic Chemistry, 1967
- Some Exchange and Substitution Reactions of Hexachlororhodium(III) and Pentachloroaquorhodium(III) Ions in Aqueous Acid SolutionsJournal of the American Chemical Society, 1965