METHOD OF SEPARATING RARE EARTHS BY ION EXCHANGE
Patent
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OSTI ID:4117701
A process is given for separating yttrium and rare earth values having atomic numbers of from 57 through 60 and 68 through 71 from an aqueous solution whose pH value can range from 1 to 9. All rare earths and yttrium are first adsorbed on a cation exchange resin, and they are then eluted with a solution of N-hydroxyethylethylenediaminetriacetic acid (HEDTA) in the order of decreasing atomic number, yttrium behaving like element 61; the effluents are collected in fractions. The HEDTA is recovered by elution with ammonia solution and the resin is regenerated with sulfuric acid. Rare earths are precipitated from the various effluents with oxalic acid, and each supernatant is passed over cation exchange resin for adsorption of HEDTA and nonprecipitated rare earths: the oxalic acid is not retained by the resin.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-007438
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 2956858
- OSTI ID:
- 4117701
- Country of Publication:
- United States
- Language:
- English
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THE PREPARATION OF A SOLUTION OF HYDROXYETHYLETHYLENEDIAMINETRIACETIC ACID FROM A SOLUTION OF TRISODIUM HYDROXYETHYLETHYLENEDIAMINETRIACETATE AND THE SEPARATION OF OXALIC ACID-HYDROXYETHYL-ETHYLENEDIAMINETRIACETIC ACID SOLUTIONS BY MEANS OF ION EXCHANGE. Report No. 237. Period covered : December 27, 1957-August 8, 1958
CATION-EXCHANGE ELUTION SEQUENCES. I. DIVALENT AND RARE-EARTH CATIONS WITH EDTA, HEDTA AND CITRATE
Anion Exchange Resin Separation of the Rare Earths, Yttrium, and Scandium in Nitric Acid-Methanol Mixtures.
Technical Report
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Mon Oct 30 23:00:00 EST 1961
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OSTI ID:4082189
CATION-EXCHANGE ELUTION SEQUENCES. I. DIVALENT AND RARE-EARTH CATIONS WITH EDTA, HEDTA AND CITRATE
Journal Article
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Fri Sep 01 00:00:00 EDT 1961
· J. Inorg. & Nuclear Chem.
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OSTI ID:4835461
Anion Exchange Resin Separation of the Rare Earths, Yttrium, and Scandium in Nitric Acid-Methanol Mixtures.
Journal Article
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Wed Aug 01 00:00:00 EDT 1962
· Analytical Chemistry
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OSTI ID:4804501