In-situ leaching of uranium

Details In-situ leaching of uranium In-situ leaching of uranium

1978-08-18

1980-01-29

Purser, Ernest R.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Input and output wells

423 3, 423 15, 423 17, E21B 4328

Patent

active

041858727

ABSTRACT:
Process for the in-situ leaching of uranium from a subterranean ore deposit comprising introducing into the deposit an aqueous lixiviant having a pH of at least 6.0 and containing an alkali metal sulfate leaching agent. The alkali metal sulfate may be employed in combination with an alkali metal carbonate or bicarbonate with the sulfate comprising the predominant leaching agent. The lixiviant may be at a pH of at least 7.5 and contain an alkali metal sulfate leaching agent and a hypochlorite oxidizing agent.

REFERENCES:
patent: 2896930 (1959-07-01), Menke
patent: 2954218 (1960-09-01), Dew et al.
patent: 3081149 (1963-03-01), Haas
patent: 3647261 (1972-03-01), Stenger et al.
patent: 3819231 (1974-06-01), Fehlner
Merritt, R. C., The Extracive Melallurgy of Uranium, Colorado School of Mines, pp. 62, 63, 104, 105.

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