Hydrometallurgical recovery of nano-palladium (Pd) from spent Pd/Al2O3 catalyst has been investigated. The Pd content in the spent catalyst sample was assayed to be 0.42% while the remainder was mainly aluminum oxide. Mixture of HCl and AlCl3 was studied as leaching agent for the sample. The Pd was deposited with formic acid. Different parameters affecting leaching and deposition processes such...

An innovative cryo-mechano-hydrometallurgical process (named LIBAT) was demonstrated at pilot scale for the treatment of EOL lithium primary batteries with chemistry Li(0)-MnO2. The allowed recycling steel scraps from external cases after cryomechanical dismantling, and recovery Mn Li products hydrometallurgical processing. During demonstration activities, about nine tons were treated in sectio...

Hydrometallurgical processes for metal extraction are becoming more and popular as average ore grades declining huge tonnages of tailings recycle materials containing valuable metals being accumulated all around the world [...]

As the depletion of zinc sulfide ores becomes more severe, investigations into recovery from oxide have aroused interest. In this regard, acid-based hydrometallurgical treatment strategies had great effectiveness. However, they are inadequate for low-grade ores. study, we examined alkaline gossan that bear zinc, such as siderite and limonite. Additionally, particular note, effects a leaching ag...

Several applications of continuum regression to non-contaminated data have shown that a significant improvement in predictive power can be obtained compared to the three standard techniques which it encompasses (Ordinary least Squares, Principal Component Regression and Partial Least Squares). For contaminated data continuum regression may yield aberrant estimates due to its non-robustness with...