Process for recovering uranium from wet-process phosphoric acid

Details Process for recovering uranium from wet-process phosphoric acid Process for recovering uranium from wet-process phosphoric acid

1978-10-27

1981-10-06

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 18, C01G 4300

Patent

active

042935296

ABSTRACT:
A process is described for the recovery of uranium values from phosphoric acid utilizing an alkyl pyrophosphoric acid (APPA) primary extractant. After extracting the uranium from the phosphoric acid, the APPA extractant is deactivated by heating and the uranium values stripped into a phosphoric acid strip solution containing ferric ion as a salting agent. The uranium values may then be re-extracted directly from this stripping solution without adjustment of its concentration into a dialkyl phosphoric acid trialkyl phosphine oxide synergistic extractant from which a relatively pure yellow cake is precipitated. A new procedure for preparing the requisite APPA primary extractants is also disclosed.

REFERENCES:
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patent: 2866680 (1958-12-01), Long
patent: 2947774 (1960-08-01), Levine et al.
patent: 3835214 (1974-09-01), Hurst et al.
patent: 3987145 (1976-10-01), Bruns et al.
patent: 4087512 (1978-05-01), Reese et al.
Ellis, Dow Report 81, "Recovery of Uranium from Industrial Phosphoric Acids by Solvent Extraction", AEC, Contract #AT-30-1-GEN-236 (1952).
Cronan, Chem. Eng., May 4, 1959, pp. 108-111.
Industrial & Eng. Chem, p. 630, Plant Process Series Flowsheet, 1959.

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