Spent Catalyst (nickel, copper, platinum, etc.)

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• Nickel Spent Catalyst
• Copper Spent Catalyst
• Platinum Spent Catalyst

Metals like Ni, Mo, Co, Rh, Pt, Pd, etc., are widely used as a catalyst in chemical and petrochemical industries. They are generally supported on porous materials like alumina and silica through precipitation or impregnation processes. In many of the cases, the metals are in the form of oxides, however, in the other cases, they are reduced into active metals for catalyzing the appropriate reactions. After periodical use of the catalysts, due to poisoning effect of foreign material and impurities, which deposit on the surface of the catalyst, they will become inactive. In such cases, fresh catalysts have to be substituted and the spent catalyst will be discarded as waste material.

Disposal of such catalyst materials, which contains appreciable amounts of heavy metals, is environmentally hazardous. Therefore, a suitable and economically viable method is required for recovery of metals at the same time method should not pose the risk of environmental hazards. Therefore, recovery of nickel and aluminium from such catalyst attracted the attention of investigators.