Dissolution behavior of precious metals and selective palladium leaching from spent automotive catalysts by trihalide ionic liquids
Arne Van den Bossche, Nerea Rodriguez Rodriguez, Sofía Riaño, Wim Dehaen, Koen Binnemans
Abstract
] and the metal concentrations in the ionic liquid were monitored. The trihalide ionic liquid allowed a more selective leaching of palladium compared to other metals present at very high concentrations in the monolith structure, like magnesium. The relative ratio of palladium over magnesium increased by two orders of magnitude compared to the original catalyst composition. The effect of the contact time between the catalyst powder and the ionic liquid on the metal concentrations in the leachate was investigated, but no significant improvement in the selectivity was observed.
Topics & Concepts
PalladiumTrihalideLeaching (pedology)Ionic liquidCatalysisDissolutionSelectivityIonic bondingCeramicInorganic chemistryMaterials scienceChemistryChemical engineeringMetallurgyOrganic chemistryHalideIonEnvironmental scienceSoil waterSoil scienceEngineeringExtraction and Separation ProcessesIonic liquids properties and applicationsRecycling and Waste Management Techniques