Process for separating iron and/or zirconium from the actinides

Details Process for separating iron and/or zirconium from the actinides Process for separating iron and/or zirconium from the actinides

1992-03-09

1993-06-29

Walsh, Donald P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 215, 423139, 423 70, 210634, B01D 1104

Patent

active

052232328

ABSTRACT:
The invention relates to a process for separating iron and/or zirconium from the actinides and/or lanthanides present in an aqueous acid solution by means of a propane diamide.
According to the invention, use is made of a pentasubstituted propane diamide of formula: ##STR1## in which R.sup.1, R.sup.2 and R.sup.3, which can be the same or different, are alkyl radicals, which can have 1 or 2 oxygen atoms in their chain.
To maintain the iron in aqueous solution, a choice is made of an appropriate propane diamide of formula (I) with R.sup.3 representing a C.sub.12 to C.sub.25 alkyl in order to have different extraction kinetics between Fe and the actinides or lanthanides, or an additive is added to the aqueous solution, e.g. oxalic acid or sodium nitrate.

REFERENCES:
patent: 4548790 (1985-10-01), Horwitz et al.
patent: 4572802 (1986-02-01), Hubert et al.
patent: 4770807 (1988-09-01), Musikas et al.
patent: 4772429 (1988-09-01), Descouls et al.
patent: 4938871 (1990-07-01), Musikas et al.
Metadex, No. 90 (7):42-744 Solvent Extr. Ion Exch. (1989) 7, (5), pp. 813-827, Thiollet et al.: "Synthesis and uses of Amides Extractants".
Metadex, No. 89 (3):42-331, Sep. Sci. Technol. (1988) 23, (12-13), pp. 1211-1226, Musikas: "Potentiality of Nonorganophosphorus Extract. in Chem. Sep. of Actinides".

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