Catalyses of uranium oxidation

Details Catalyses of uranium oxidation Catalyses of uranium oxidation

1978-06-15

1980-04-29

Schafer, Richard E.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

252186, 423 7, 423 17, 423 20, E21C 4114, C01G 5600

Patent

active

042003377

ABSTRACT:
The oxidation of uranium is catalyzed with water-soluble copper or zinc chelates. An aqueous solution is prepared containing carbonate or bicarbonate ion, an oxidizer such as hydrogen peroxide or oxygen, and a water-soluble copper or zinc chelate which has at least two amino, carboxylic acid, or thiocarboxylic acid donor groups. The solution is pumped into an underground deposit of uranium. The water-soluble +4 state uranium is oxidized to the water-soluble +6 state which forms a complex with the carbonate ion. The solution is pumped to the surface and is recycled after precipitation of the uranium.

REFERENCES:
patent: 1999807 (1935-04-01), Gibbs
patent: 2863717 (1958-12-01), Kunin
patent: 2869930 (1959-07-01), Menke
patent: 3003848 (1961-10-01), Hillyer
patent: 3017241 (1962-01-01), McLean
patent: 3036881 (1962-05-01), Clifford
patent: 3081149 (1963-03-01), Haas
patent: 3175878 (1965-03-01), Hillyer
patent: 3778498 (1973-12-01), Yano et al.
patent: 3792903 (1974-02-01), Rhoades

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