Purification of cerium using ceric ammonium nitrate (in Japanese)
The following methods were investigated for the separation of lanthanides such as La, Pr, Nd, Sm, Eu, and Y in ceric ammonium nitrate: (1) fractional crystallization of ceric ammonium nitrate; (2) treatment of nitrocerite complex anion with cation exchanger; and (3) extraction of ceric ammonium nitrate using TBP as a solvent. Rare earth impurities were measured with the aid of radiotracer techniques. In the course of the first operation, the co-crystallization ratio of rare earth elements to cerium was 0.03 (La) to 0.06 (Eu). In the course of the second method, the distribution coefficients of Ln(III) were 10/sup 5/ to 400, varying as to concentration of solution. ln the course of the third method, the ratio of extraction of La to Sm were 0.006 to 1.23%, and 99.9 to 98.5% of La to Sm in organic phase were stripped by 6N nitric acid. (auth)
- Research Organization:
- Government Industrial Research Inst., Osaka
- NSA Number:
- NSA-29-002467
- OSTI ID:
- 4426007
- Journal Information:
- Osaka Kogyo Gijutsu Shikenjo Kiho, v. 24, no. 2, pp. 93-98, Journal Name: Osaka Kogyo Gijutsu Shikenjo Kiho, v. 24, no. 2, pp. 93-98; ISSN OKGKA
- Country of Publication:
- Japan
- Language:
- Japanese
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EXTRACTION OF CERIUM
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*LANTHANUM-- SOLVENT EXTRACTION
*NEODYMIUM-- SOLVENT EXTRACTION
*PRASEODYMIUM-- SOLVENT EXTRACTION
*SAMARIUM-- SOLVENT EXTRACTION
*YTTRIUM-- SOLVENT EXTRACTION
AMMONIUM COMPOUNDS
CERIUM NITRATES
CRYSTALLIZATION
EUROPIUM 155
IMPURITIES
LANTHANUM 140
N40140* --Chemistry--Separation Procedures
NEODYMIUM 147
PRASEODYMIUM 143
SAMARIUM 153
TRACER TECHNIQUES
YTTRIUM 91