Method of separating and recovering ruthenium from high-level ra

Details Method of separating and recovering ruthenium from high-level ra Method of separating and recovering ruthenium from high-level ra

1994-12-07

1995-08-01

Walsh, Donald P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 10, 423 22, 205257, 205 98, 205 99, C01F 1300, C01F 1500

Patent

active

054378478

ABSTRACT:
A method of recovering volatile ruthenium, which is separated and formed by constant potential electrolysis from high-level radioactive liquid waste discharged from the reprocessing step of spent nuclear fuel by purex process, in the form of stable solid. The method comprises electrolyzing at a constant potential a high-level radioactive liquid waste from which palladium has substantially been removed in advance, thereby vaporizing ruthenium, bringing the vaporized ruthenium into contact with an aqueous solution of formic acid to precipitate ruthenium oxide, and separating the precipitate from the aqueous solution of formic acid.

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