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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Separation of Pd from Pt and Rh by solvent extraction method from waste solution
Karolina Pianowska1, Joanna Kluczka2, Grzegorz Benke3
1Łukasiewicz Research Network - Institute of Non-Ferrous Metals, Sowińskiego 5, 44-100, Gliwice, Poland. Karolina.Pianowska@imn.lukasiewicz.gov.pl.
Abstract:
The paper investigated the possibility of extractive separation of palladium from platinum and rhodium with ionic liquid Cyphos IL 101. A technological solution obtained by dissolving waste materials was used as the test material. Based on the experiments performed, it was found that a 10% (v/v) solution of the Cyphos IL 101 ionic liquid in toluene allows the extraction of both Pd and Pt with an efficiency of 99% from the initial solution when extraction is carried out at the pH 0.5, vorg:vaq phase ratio 1:1 and contact time of 15 min. Moreover, the research proved that it is possible to separate Pd from Pt at the stripping stage using a 0.1 mol/dm3 thiourea solution while maintaining a high selectivity coefficient.
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