@Article{, title={Extraction of Valuable Metals From Spent Hydrodesulfurization Catalyst By Two Stage Leaching Method}, author={Mariam F. AbdulNabi مريم فارس and Nada S. Ahmedzeki ندى سعدون احمد زكي and Wadood T. Mohammed ودود طاهر محمد}, journal={Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط}, volume={12}, number={4}, pages={21-35}, year={2011}, abstract={Spent hydrodesulfurization (Co-Mo/γ-Al2O3) catalyst generally contains valuable metals like molybdenum (Mo), cobalt (Co), aluminium (Al) on a supporting material, such as γ-Al2O3. In the present study, a two stages alkali/acid leaching process was conducted to study leaching of cobalt, molybdenum and aluminium from Co-Mo/γ-Al2O3 catalyst. The acid leaching of spent catalyst, previously treated by alkali solution to remove molybdenum, yielded a solution rich in cobalt and aluminium.

} }