Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1978-06-15
1981-01-06
Miller, Edward A.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
299 5, 423 15, C06G 4300, E21B 4328
Patent
active
042436389
ABSTRACT:
Uranium ore deposits which contain uranium in the relatively insoluble tetravalent state are readily selectively leached in situ to recover relatively pure uranium compounds, by: (a) passing through the ore deposit a relatively dilute aqueous leach solution of ammonium bicarbonate, ferric ammonium ethylenediaminetetraacetic acid (EDTA), and a source of oxygen, the leach solution converting the tetravalent uranium to hexavalent uranium which readily dissolves in the leach solution; (b) withdrawing the reacted leach solution enriched in dissolved uranium from the ore deposit; and (c) stripping the uranium from the withdrawn leach solution. The stripping of the uranium from the leach solution is preferably accomplished by countercurrent flow of the enriched leach solution to a column of base anion exchange material which preferentially extracts the uranium. Base anion exchange material loaded with uranium is separated from the leach solution and is treated with an aqueous alkaline eluant to extract the uranium and to regenerate the base anion exchange material. The stripped leach solution is adjusted by adding ammonium bicarbonate, peroxide, and ferric ammonium EDTA, and its pH corrected if necessary, and the leach solution is recycled through the ore deposit. The uranium bearing eluant is then acidified and treated with ammonia to precipitate relatively pure ammonium diuranate (ADU).
REFERENCES:
patent: 3309140 (1967-03-01), Gardner et al.
patent: 3700280 (1972-10-01), Papadopoulos et al.
patent: 3708206 (1973-01-01), Hard et al.
patent: 3792903 (1974-02-01), Rhoades
patent: 4103963 (1978-08-01), Espenscheid et al.
patent: 4155982 (1979-05-01), Hunkin et al.
Jackovitz John F.
Panson Armand J.
Pantier Earl A.
Fuerle R. D.
Miller Edward A.
Westinghouse Electric Corp.
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