The aqueous behaviour of rhodium (III) (Rh) in chloride solutions was investigated with the objective of evaluating its response to solvent extraction with 8-hydroxyquinoline derivatives. A theoretical analysis of the abundance of the various chloro-complexes in solution revealed that monoaquo-pentachlororhodate and hexachlororhodate are the most common forms of Rh(III) in chloride solutions ($>$0.5M Cl$ sp{-}$) and that the relative abundance of hexachlororhodate may be lower than was previously reported. / The extraction degree of Rh(III) with 8-hydroxyquinoline derivatives from solutions ranging in acidity from 0.7 to 8.0M and in chloride concentration from 0.7 to 4M was found to follow the calculated abundance of hexachlororhodate (about 5 to 40% in the region investigated). Also, the extraction mechanism was deduced to be ion-pair formation. / The extraction degree of Rh(III) from similar solutions but previously treated with SnCl$ sb2$, was also investigated, and in this case the extraction was quantitative throughout the acidity and chloride concentration ranges tested. Virtual quantitative stripping can be achieved with four five-minute contacts with 1.7M H$ sb2$SO$ sb4$ + 1M Na$ sb2$SO$ sb4$. A preliminary flowsheet for the industrial application of this solvent extraction process for Rh is presented.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.61340 |
| Date | January 1991 |
| Creators | Benguerel, Elyse |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Mining and Metallurgical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001318503, proquestno: AAIMM80368, Theses scanned by UMI/ProQuest. |
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