Bidentate organophosphorus solvent extraction process for actini

Details Bidentate organophosphorus solvent extraction process for actini Bidentate organophosphorus solvent extraction process for actini

1975-08-27

1976-11-23

Schafer, Richard E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 10, B01D 1100

Patent

active

039937283

ABSTRACT:
A liquid-liquid extraction process for the recovery and partitioning of actinide values from acidic nuclear waste aqueous solutions, the actinide values including trivalent, tetravalent and hexavalent oxidation states is provided and includes the steps of contacting the aqueous solution with a bidentate organophosphorous extractant to extract essentially all of the actinide values into the organic phase. Thereafter the respective actinide fractions are selectively partitioned into separate aqueous solutions by contact with dilute nitric or nitric-hydrofluoric acid solutions. The hexavalent uranium is finally removed from the organic phase by contact with a dilute sodium carbonate solution.

REFERENCES:
patent: 3243254 (1966-03-01), Siddall
butler, F. E. et al., "Determination of Actinides in Biological Samples with Bidentate Organophosphorous Extractant," In Anal. Chem., 42(9):1073-1076, Aug., 1970.

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