TY - JOUR ID - TI - Extraction of Valuable Metals From Spent Hydrodesulfurization Catalyst By Two Stage Leaching Method AU - Mariam F. AbdulNabi مريم فارس AU - Nada S. Ahmedzeki ندى سعدون احمد زكي AU - Wadood T. Mohammed ودود طاهر محمد PY - 2011 VL - 12 IS - 4 SP - 21 EP - 35 JO - Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط SN - 19974884 26180707 AB - 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.

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