Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1981-11-04
1984-02-21
Miller, Edward A.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423 8, 423321S, C01G 4300
Patent
active
044329458
ABSTRACT:
An improvement in effecting uranium recovery from phosphoric acid solutions is provided by sparging dissolved oxygen contained in solutions and solvents used in a reductive stripping stage with an effective volume of a nonoxidizing gas before the introduction of the solutions and solvents into the stage. Effective volumes of nonoxidizing gases, selected from the group consisting of argon, carbon dioxide, carbon monoxide, helium, hydrogen, nitrogen, sulfur dioxide, and mixtures thereof, displace oxygen from the solutions and solvents thereby reduce deleterious effects of oxygen such as excessive consumption of elemental or ferrous and accumulation of complex iron phosphates or cruds.
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Hurst et al, "Recovery of Uranium from Wet Process Phosphoric Acid", Ind. g. Chem. Process, 11, pp. 122-128 (1972).
MacCready et al, "Uranium Extraction from Florida Phosphates", Nucl. Tech., 53, pp. 344-353 (1981).
Brown Gilbert M.
Hurst Fred J.
Posey Franz A.
Besha Richard G.
Carter C. Clay
Hamel Stephen D.
Miller Edward A.
The United States of America as represented by the Department of
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