Process for the chemical treatment of uraniferous ores containin

Details Process for the chemical treatment of uraniferous ores containin Process for the chemical treatment of uraniferous ores containin

1978-02-08

1980-06-03

Schafer, Richard E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 3, 423551, C22B 6002

Patent

active

042061822

ABSTRACT:
The invention relates to a process for the treatment of an uraniferous ore containing sulfur in the form of sulfates or sulfides with one or more alkaline solutions containing sodium carbonate in the presence of an oxidant, for extracting uranium in the form of soluble uranium salt in said solution.
It comprises subjecting the ore, in a first step, to the action of a dilute pre-leach solution of sodium carbonate, whose concentration does not substantially exceed, or by very little, that which is required for the solubilization of the major part of the sulfur initially contained in the ore to convert it to sulfate in the presence of the oxidant and, in a second step, to the action of a leach solution, more concentrated in sodium carbonate, enabling the extraction and solubilization in the medium of the major part of the uranium still contained in the ore, not extracted in the pre-leach medium of the first step.

REFERENCES:
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patent: 2950951 (1960-08-01), Sherk
patent: 2964380 (1960-12-01), Kolodney
patent: 2979378 (1961-04-01), Koble
patent: 2992887 (1961-07-01), Thuanes et al.
patent: 3022135 (1962-02-01), Hart
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patent: 3708206 (1973-01-01), Hard
patent: 3792903 (1974-02-01), Rhoades
Jovanovik, M. et al. "Alkaline Leaching of Uranium from Coal Ashes," Prog. Nuc. Energy, Series III, Process Chem. vol. III, pp. 13-20, 1961.

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