Recovery of Precious Metals: A Promising Process Using Supercritical Carbon Dioxide and CO₂-Soluble Complexing Polymers for Palladium Extraction from Supported Catalysts.

ABSTRACT: Precious metals such as palladium (Pd) have many applications, ranging from automotive catalysts to fine chemistry. Platinum group metals are, thus, in massive demand for industrial applications, even though they are relatively rare and belong to the list of critical materials for many countries. The result is an explosion of their price. The recovery of Pd from spent catalysts and, more generally, the development of a circular economy process around Pd, becomes essential for both economic and environmental reasons. To this aim, we propose a sustainable process based on the use of supercritical CO₂ (i.e., a green solvent) operated in mild conditions of pressure and temperature (p = 25 MPa, T = 313 K). Note that the range of CO₂ pressures commonly used for extra

SUBMITTER: Ruiu A 

PROVIDER: S-EPMC10488959 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature