Method of recovering uranium from wet process phosphoric acid wi

Details Method of recovering uranium from wet process phosphoric acid wi Method of recovering uranium from wet process phosphoric acid wi

1981-07-27

1984-01-24

Heijer, Gregory A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 11, 423 20, 423320, 423555, 423166, B01D 1100, B01F 1100, C01G 4300, C01B 2516

Patent

active

044276419

ABSTRACT:
In preparing wet process phosphoric acid by decomposing a phosphate rock containing uranium with sulfuric acid and phosphoric acid on condition that hemihydrate gypsum is formed in an acid solution either at the stage of decomposing the phosphate rock or subsequently, uranium contained in the phosphate rock can almost entirely be retained in the obtained phosphoric acid solution by forming the hemihydrate gypsum in the presence of an oxidizing agent, such as a soluble chlorate, hydrogen peroxide or oxygen gas, in the acid solution in a quantity sufficient to render the entire uranium dissolved in the acid solution hexavalent because hemihydrate gypsum adsorbs almost exclusively tetravalent ions of uranium. The uranium is then recovered.

REFERENCES:
patent: 2767045 (1956-10-01), McCullough
patent: 2799557 (1957-07-01), Seyfried
patent: 2885264 (1959-05-01), Peet
patent: 3632307 (1972-01-01), Ven Es et al.
patent: 3745208 (1973-07-01), Bigot et al.
patent: 4311677 (1982-01-01), Gerunda et al.
Chemical Abstracts, vol. 80, No. 24, Jun. 17, 1974, p. 179, Abstract 136110v, Columbus Ohio & ES-A 393 518 (Junta De Energia Nuclear) 16-08-1973.

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