FIELD: chemistry.
SUBSTANCE: invention relates to a method of extracting americium from liquid radioactive wastes to separate it from rare-earth metals. Method includes combined extraction of americium and rare-earth metals from nitrate radioactive solution with solution of neutral organic extractant in a polar fluororganic solvent, washing metal-saturated organic phase, selective re-extraction of americium. Extraction agent used is N,N,N′,N′-tetraalkylamide diglycolic acid, solution for re-extraction of americium is a composition of 5-20 g/l complexon, 5-60 g/l of nitrogen-containing organic acid and 60-240 g/l salting-out agent.
EFFECT: technical result consists in extraction of americium from acidic liquid radioactive solutions and its separation from all rare-earth metals in one extraction cycle.
5 cl, 34 tbl, 17 ex
| Title | Year | Author | Number |
|---|---|---|---|
| EXTRACTION MIXTURE FOR EXTRACTION OF ACTINIDES FROM NITRIC ACID SOLUTIONS | 2015 |
|
RU2620583C2 |
| EXTRACTION METHOD OF SEPARATING RARE-EARTH ELEMENTS | 0 |
|
SU465900A1 |
| METHOD OF EXTRACTION OF RARE-EARTH METALS FROM THEIR MIXTURES | 1992 |
|
RU2049133C1 |
| METHOD OF SEPARATING GADOLINIUM BY EXTRACTION WITH PHOSPHOROORGANIC COMPOUNDS | 2012 |
|
RU2518619C2 |
| INCREASING SEPARATION FACTOR BETWEEN AMERICIUM AND CURIUM AND/OR LANTHANIDES IN LIQUID-LIQUID EXTRACTION PROCESS USING DIGLYCOLAMIDE AND ANOTHER EXTRACTANT | 2010 |
|
RU2560603C2 |
| LIGHT-CONVERTING MATERIAL AND COMPOSITION FOR PRODUCING SAID MATERIAL | 2007 |
|
RU2407770C2 |
| METHOD OF SELECTIVE AMERICIUM REMOVAL FROM NITRIC WATER PHASE | 2010 |
|
RU2544716C2 |
| DIAMIDES OF 4,7-DISUBSTITUTED 1,10-PHENANTHROLINE-2,9-DICARBOXYLIC ACIDS, SYNTHESIS METHOD THEREOF AND EXTRACTION MIXTURE BASED THEREON | 2014 |
|
RU2601554C2 |
| X-RAY DIAGNOSTICS CONTRAST AGENT (OPTIONS) AND METHOD OF PREPARATION THEREOF | 1999 |
|
RU2173173C2 |
| GROUPED SEPARATION OF ACTINIDES FROM STRONGLY ACIDIC AQUEOUS PHASE | 2007 |
|
RU2438200C2 |
