Rapid Dissolution of Noble Metals in Organic Solvents.

ABSTRACT: The dissolution of elemental noble metals (NMs) such as gold, platinum, palladium, and copper is necessary for their recycling but carries a high environmental burden due to the use of strong acids and toxic reagents. Herein, a new approach was developed for the rapid dissolution of elemental NMs in organic solvents using mixtures of triphenylphosphine dichloride or oxalyl chloride and hydrogen peroxide, forming metal chloride salts directly. Almost quantitative dissolution of metallic Au, Pd, and Cu was observed within minutes at room temperature. For Pt, dissolution was achieved, albeit more slowly, using the chlorinating oxidant alone but was inhibited on addition of hydrogen peroxide. After leaching, transfer of Pt^IV and Pd^II chloride salts from the organic phase

SUBMITTER: Nag A 

PROVIDER: S-EPMC9804267 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature