Process for recovery of uranium from wet process phosphoric acid

Details Process for recovery of uranium from wet process phosphoric acid Process for recovery of uranium from wet process phosphoric acid

1976-03-08

1978-08-08

Schafer, Richard E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423139, B01D 1104

Patent

active

041057414

ABSTRACT:
Process for the recovery of uranium from wet process phosphoric acid solution in which an organic extractant, containing uranium values and dissolved iron impurities and comprising a dialkylphosphoric acid and a trialkylphosphine oxide dissolved in a water immiscible organic solvent, is contacted with a substantially iron-free dilute aqueous phosphoric acid to remove said iron impurities. The removed impurities are bled from the system by feeding the resulting iron-loaded phosphoric acid to a secondary countercurrent uranium extraction operation from which they leave as part of the uranium-depleted acid raffinate. Also, process for recovering uranium in which the extractant, after it has been stripped of uranium values by aqueous ammonium carbonate, is contacted with a dilute aqueous acid selected from the group consisting of H.sub.2 SO.sub.4, HCl, HNO.sub.3 and iron-free H.sub.3 PO.sub.4 to improve the extraction efficiency of the organic extractant.

REFERENCES:
patent: 2790702 (1957-04-01), McCullough
patent: 2859092 (1958-11-01), Bailes et al.
patent: 2885260 (1959-05-01), Maraman et al.
patent: 3193381 (1965-07-01), George
patent: 3214239 (1965-10-01), Hazen et al.

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