THE SEPARATION OF CERIUM FROM THE TRIVALENT RARE EARTHS USING HYDROGEN PEROXIDE AND SODIUM ACETATE
Cerium was completely precipitated (>99%) as a cerium(IV) peroxyacetate from a nitrate solution containing cerium, yttrium, and other trivalent rare earths with only 5 to 15% of the trivalent rare earths carrying on the cerium precipitate. The process is accomplished by the addition of a buffered hydrogen peroxide-sodium acetate solution to the rare earth nitrate feed solution at 25 tained C, equilibration for three hours at 45 to 55 tained C, flltration or centrifugation of the precipitate, washing of the precipitate, and dissolution of the precipitate in warm nitric acid. The contamination of the cerium precipitate by the trivalent rare earths cam be reduced to less than 1% of the trivalent rare earth content of the initial feed solution by a reprecipitation. The recovery of cerium and the degree of separation from the other rare earths depended upon balancing the pH of the peroxide-acetate solution against the pH of the rare earth feed solution. This can be accomplished within reasonably broad limits. The limits are sufficiently broad enough to carry out the process in the Purex plant head-end equipment with exercise of reasonable care. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-14-019023
- OSTI ID:
- 4186541
- Report Number(s):
- HW-62505
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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