Recovery of metal values from spent catalysts

Details Recovery of metal values from spent catalysts Recovery of metal values from spent catalysts

1984-08-13

1988-01-26

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 63, 423 68, 423112, 423122, 423128, 423132, 423139, 423140, 423150, C01G 3900, C01G 3100, C01G 5300, C01G 5100

Patent

active

047216069

ABSTRACT:
Spent catalysts from hydrocarbon refining processes, comprising transition metal compounds on aluminum oxide-containing supports, are subjected to an oxidative roasting and are treated with sulfuric acid in a counter-current digester to dissolve metals. Following operations to separate compounds of the various transition metals, a solution containing approximately stoichiometric equivalents of aluminum and sulfate is obtained.

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"Solvent Extraction in Sumitomo's Cobalt Refining Process", paper by M. Fiyiimori, N. O. no, S. Itassko and I. Fukui, at Canadian Institute of Mining and Metallurgy, 10th Annual Hydrometallurgy Meeting, Oct. 26-28, 1980.
Nishimura Saji, "Recovery of Valuable Metals from Waste Catalyst", Oct. 30, 1976, app. 75/50,370, abstracted in Chem. Abs., vol. 86, 1977, 86:45888n.

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