Reductive stripping of uranium values from wet-process phosphori

Details Reductive stripping of uranium values from wet-process phosphori Reductive stripping of uranium values from wet-process phosphori

1980-05-22

1983-10-04

Gerstl, Robert

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 8, C01G 4300

Patent

active

044077807

ABSTRACT:
Uranium values are recovered from a wet-process phosphoric acid solution by extracting said solution with a first organic extractant, reductively stripping the resulting first organic phase of its uranium values with a strip solution including and in which ferrous ion is utilized to reduce uranyl ions in said first organic phase to uranous ions therein, disengaging the strip solution from said first organic extractant and oxidizing same to convert the uranous ions therein to uranyl ions, next extracting said oxidized strip solution and the uranium values contained therein with a second organic extractant, and then stripping said uranium values from the resulting second organic phase, said recovery featuring (i) washing with an iron-free aqueous wash solution, and upstream of the reductive stripping thereof, the organic phase resulting from said first extraction, and (ii) utilizing effluent, iron-free wash solution from the step (i) to wash the organic phase resulting from said second extraction and concomitantly to strip any iron values therefrom, upstream of the stripping of the uranium values therefrom.

REFERENCES:
patent: 2859092 (1958-11-01), Bailes
patent: 3711591 (1973-01-01), Hurst
patent: 3737513 (1973-06-01), Wiewiorowski
patent: 3835214 (1974-09-01), Hurst
patent: 3966872 (1976-06-01), Sundar
patent: 3966873 (1976-06-01), Elikan
patent: 4002716 (1977-01-01), Sundar
patent: 4105741 (1978-08-01), Wiewiorowski
patent: 4332776 (1982-06-01), Stana
Ornl-Tm-2522, Oak Ridge National Lab., (1969).

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