Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1980-11-20
1983-09-06
Padgett, Benjamin R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423 3, C22B 6002
Patent
active
044029217
ABSTRACT:
In accordance with the present invention, uranium values are extracted from materials containing uranium in valence states lower than its hexavalent state by contacting the materials containing uranium with an aqueous alkaline leach solution containing an alkaline chlorate in an amount sufficient to oxidize at least a portion of the uranium in valence states lower than its hexavalent state to its hexavalent state. In a further embodiment of the present invention, the alkaline leach solution is an aqueous solution of a carbonate selected from the group consisting of ammonium carbonate, ammonium bicarbonate and mixtures thereof. In yet another embodiment of the present invention, at least one catalytic compound of a metal selected from the group consisting of copper, cobalt, iron, nickel, chromium and mixtures thereof adapted to assure the presence of the ionic species Cu.sup.++, Co.sup.++, Fe.sup.+++, Ni.sup.++, Cr.sup.+++ and mixtures thereof, respectively, during the contacting of the material containing uranium with the alkaline leach solution and in an amount sufficient to catalyze the oxidation of at least a portion of the uranium in its lower valence states to its hexavalent state, is present.
REFERENCES:
patent: 3017241 (1962-01-01), Chalmers
patent: 3036881 (1962-05-01), Clifford
patent: 4200337 (1980-04-01), Jackovitz et al.
Merritt, Robert C., "The Extractive Metallurgy of Uranium", Colorado School of Mines Research Institute, 1971, pp. 83-84, 98-112.
Padgett Benjamin R.
Phillips Petroleum Company
Thexton Matthew A.
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