Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium
Patent
1990-03-01
1991-05-07
Rosenberg, Peter D.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iiia metal or beryllium
75 1048, C22B 400
Patent
active
050135333
ABSTRACT:
A process for recovering heavy metals from spent catalysts on an alumina support material comprising calcining the catalyst feed material to remove impurities and smelting the calcined feed in an electric arc furnace, preferably with scrap iron. A reducing agent, such as natural gas, is injected into the furnace to reduce the heavy metals to their metallic states. The reduced metals form an alloy and separate from the alumina by gravity.
REFERENCES:
patent: 4029495 (1977-06-01), Hirayama
Barnes Wilson R.
Howard Robert A.
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