Ferric ion as a scavenging agent in a solvent extraction...

Details Ferric ion as a scavenging agent in a solvent extraction... Ferric ion as a scavenging agent in a solvent extraction...

C - Chemistry, Metallurgy

22

B

53/178

C22B 60/04 (2006.01) C01G 56/00 (2006.01) C22B 60/02 (2006.01) G21C 19/46 (2006.01)

Patent

CA 1064707

ABSTRACT OF THE DISCLOSURE Ferric ions are added into the aqueous feed of a plutonium scrap recovery process that employs a tributyl phosphate extractant. Radiolytic degradation products of tributyl phosphate such as dibutyl phosphate form a solid precipitate with iron and are removed from the extraction stages via the waste stream. Consequently, the solvent extraction characteristics are improved, particularly in respect to minimizing the formation of nonstrippable plu- tonium complexes in the stripping stages. The method is expected to be also applicable to the partitioning of plu- tonium and uranium in a scrap recovery process.

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