METHOD FOR ISOLATING AMERICIUM FROM LIQUID RADIOACTIVE WASTE AND FOR SEPARATING AMERICIUM FROM RARE EARTH ELEMENTS

The proposed invention relates to processes of extraction and concentration of radio nuclides and can be used in radiochemical technologies when processing liquid radioactive wastes. A method for extraction of americium from liquid radioactive wastes and its separation from rare-earth elements compr...

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Hauptverfasser:	TKACHENKO, Ludmila Igorevna, HASANOV, Rinat Nailevich, ALYAPYSHEV, Mihail Yurievich, LOGUNOV, Mihail Vasilievich, KENF, Ekaterina Vladimirovna, BABAIN, Vasily Aleksandrovich, SHADRIN, Andrey Yurievich, VIDANOV, Vitaliy Lvovich, VOROSHILOV, Yuriy Arkadievich
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY DECONTAMINATION ARRANGEMENTS THEREFOR FERROUS OR NON-FERROUS ALLOYS METALLURGY NUCLEAR ENGINEERING NUCLEAR PHYSICS PHYSICS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT TREATING RADIOACTIVELY CONTAMINATED MATERIAL TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The proposed invention relates to processes of extraction and concentration of radio nuclides and can be used in radiochemical technologies when processing liquid radioactive wastes. A method for extraction of americium from liquid radioactive wastes and its separation from rare-earth elements comprises simultaneous extraction of americium and rare-earth elements from radioactive nitrate solution with neutral solution of organic extracting agent in polar fluorinated organic solvent, washing of saturated with metals organic phase, selective re-extraction of americium. N,N,N',N'- tetraalkyl-amide of diglycolic acid is used as an extracting agent and solution containing 5-20 g/L of complexon, 5-60 g/L of nitrogen-containing organic acid and 60-240 g/L of salting-out agent is used as a solution for re-extraction of americium. Technical effect is the extraction of americium from acidic liquid radioactive solutions and its separation from all rare-earth elements in a single extraction cycle.