A review of Solvent Extraction; a possible method of platinum recovery of spent petrochemical catalysts

Platinum solvent extraction has been under investigation for about half a century. Various extractants have been developed which posses both high efficiency and better selectivity toward platinum from base metals such as Aluminum and Iron and also from other precious metals such as palladium or rhodium. In this critical study, we’re going to review the solvent extractants for Pt recovery from spent catalysts of petrochemical processes and provide a simple solution to improve selectivity and efficiency of these extractants.