Dissolution of noble metals in highly concentrated acidic salt solutions
Federica Forte, Sofía Riaño, Koen Binnemans
Abstract
Highly concentrated solutions of AlCl3·6H2O and Al(NO3)3·9H2O were investigated for Au and platinum group metals dissolution. 95% Pd was leached from spent automotive catalysts in 15 min at 80 °C, while Pt required longer times; Rh dissolution was <20%. Au dissolution from wires required 24 h. Pd recovery was investigated by reductive precipitation.
Topics & Concepts
DissolutionSalt (chemistry)ChemistryInorganic chemistrySalt solutionNoble metalMetalOrganic chemistryExtraction and Separation ProcessesMetal Extraction and BioleachingIonic liquids properties and applications