Process for the separation of actinides from lanthanides by the

Details Process for the separation of actinides from lanthanides by the Process for the separation of actinides from lanthanides by the

1992-08-13

1993-10-26

Walsh, Donald P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

534 11, B01D 1100

Patent

active

052563839

ABSTRACT:
The invention relates to a process for the separation of actinides from lanthanides by the selective extraction of the actinides in an organic solvent incorporating a propane diamide.
This process consists of adding to the aqueous nitric solution containing the actinides and lanthanides a thiocyanate, e.g. ammonium thiocyanate, followed by the contacting of said solution with an organic solvent incorporating at least one propane diamide, e.g. 2-tetradecyl-N,N'-dimethyl-N,N'-dibutyl-propane diamide and optionally a quaternary ammonium salt such as trilauryl methyl ammonium (TMA) thiocyanate or a mixture of quaternary ammonium thiocyanates.
This leads to distribution coefficients D.sub.M for the actinides (Am) and the lanthanides (Eu, Ce) making it possible to achieve high actinide/lanthanide separation factors.

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