Dissolution behavior of precious metals and selective palladium leaching from spent automotive catalysts by trihalide ionic liquids.

ABSTRACT: The dissolution behavior of the precious metals gold, platinum, rhodium and palladium in the trihexyl(tetradecyl)phosphonium trihalide ionic liquids [P₆₆₆₁₄][Cl₃], [P₆₆₆₁₄][Br₃], [P₆₆₆₁₄][IBr₂] and [P₆₆₆₁₄][I₃] was investigated. The highest dissolution rates were observed for the trichloride ionic liquid [P₆₆₆₁₄][Cl₃] and this system was investigated in more detail. The effects of the trichloride concentration in the ionic liquid and temperature were studied, reaching higher leaching rates at higher trichloride conversions and increased temperatures. The stability of the trichloride anion at these elevated temperatures was studied by Raman spectroscopy. It was found that the trichl

SUBMITTER: Van den Bossche A 

PROVIDER: S-EPMC8695518 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature