Method of recovering uranium from wet process phosphoric acid

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

1982-02-22

1984-02-14

Kyle, Deborah L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 11, 423 18, 423320, 423555, C01G 5600

Patent

active

044316100

ABSTRACT:
An economically advantageous method of recovering uranium from a wet process phosphoric acid solution through the steps of making hemihydrate gypsum contact with the acid solution thereby transferring uranium from the acid solution into the gypsum, dispersing the U-containing gypsum separated from the acid solution in water to convert the gypsum to dihydrate accompanied by the transfer of uranium into water, separating the obtained U-containing aqueous solution from the dihydrate gypsum, and adding precipitant such as an inorganic base to the aqueous solution to form a precipitate comprising an insoluble uranium compound. The contact of hemihydrate gypsum with the phosphoric acid solution is preferably preceded by reduction of hexavalent uranium in the acid solution to tetravalent uranium, and can be achieved either by adding hemihydrate gypsum to the acid solution or by converting dihydrate gypsum to hemihydrate within the acid solution preferably preceded by the addition of sulfuric acid.

REFERENCES:
patent: 3632307 (1972-01-01), van Es et al.
patent: 4311677 (1982-01-01), Gerunda et al.

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