FIELD: technological processes.
SUBSTANCE: invention relates to extraction separation of rare-earth elements from nitrate solutions. Method involves extraction of initial solution containing nitrates of rare-earth elements and salting-out agent with tributyl phosphate, washing and re-extraction with acidified water. At that, re-extraction agent relative to initial solution is divided into two flows at ratio of initial solution:first flow:second flow is equal to 1 : (0.3-0.4) : (0.5-1.0), after which first flow is evaporated to concentration of 280-320 g/l and delivered for washing out organic phase, and second flow is treated with ammonium hydroxide or ammonium carbonate and hydroxide is separated by filtration of rare-earth elements, and filtrate is delivered for preparation of initial solution.
EFFECT: invention provides efficient extraction of rare-earth elements and reduced power consumption.
1 cl, 1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF EXTRACTION SEPARATION OF RARE-EARTH ELEMENTS | 2018 |
|
RU2693714C1 |
| METHOD OF EXTRACTING RARE-EARTH ELEMENTS FROM HYDRATE-PHOSPHATE RESIDUES FROM APATITE PROCESSING | 2012 |
|
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| METHOD OF RECOVERING RARE-EARTH ELEMENTS FROM EUDIALYTE CONCENTRATE SOLUTION SUBJECTED TO HYDROCHLORIC ACID DECOMPOSITION | 2005 |
|
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| METHOD FOR SOLVENT REFINING OF NITRATE SOLUTIONS CONTAINING RARE-EARTH METALS | 2013 |
|
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| METHOD OF PROCESSING RARE-EARTH ELEMENTS CONCENTRATE | 2015 |
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| METHOD OF PROCESSING HIGH-ACTIVITY WASTE WITH FRACTIONATION OF RADIONUCLIDES | 2019 |
|
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| METHOD OF EXTRACTION AND RECOVERY OF PUREX-PROCESS REFINED PRODUCT FOR SPENT NUCLEAR FUEL OF NUCLEAR POWER STATIONS | 2003 |
|
RU2249266C2 |
| METHOD OF PROCESSING NITRATE SOLUTIONS CONTAINING RARE-EARTH METALS | 2015 |
|
RU2598766C1 |
| EXTRACTION PHOSPHORIC ACID PURIFICATION PROCESS | 2001 |
|
RU2191745C1 |
| EXTRACTION SEPARATION OF ZIRCONIUM AND HAFNIUM | 2012 |
|
RU2521561C2 |
