Abstract: The present disclosure broadly relates to a process for recovering scandium and/or vanadium values from various feedstocks. More specifically, but not exclusively, the present disclosure relates to a process for the selective recovery of scandium and/or vanadium values from a feedstock, the process comprising: leaching the feedstock in a sulfuric acid solution while simultaneously sonicating the sulfuric acid solution thereby producing a pregnant solution; and selectively removing scandium and vanadium compounds from the pregnant solution using a solvent extraction process.

Abstract: The present disclosure broadly relates to a process for recovering gold and/or silver values from various feedstocks. More specifically, but not exclusively, the present disclosure relates to a process for the selective recovery of gold and/or silver values from a feedstock, the process comprising: leaching the feedstock in a sulfuric acid solution comprising thiourea while simultaneously sonicating the sulfuric acid solution thereby producing a pregnant solution; and selectively removing gold and/or silver compounds from the pregnant solution using a solvent extraction process or an ion exchange extraction process.