Selective separation of zirconium from uranium in carbonate solutions by ion flotation
- Centre de Recherche sur La Valorisation des Minerais, Vandoeuvre (France)
- Somair B.P., Artlit (Niger)
- Uranium Pechiney Direction Recherche and Development, Paris (France)
Separation of zirconium from uranium in carbonate media was undertaken by ion flotation. The collector chosen was octylhydroxamic acid (HOHX). It gave a well-flocculated precipitate with zirconium which floated in less than 5 min. The stoichiometry of the reaction is HOHX/Zr = 3.9/1, and the selectivity in the presence of uranium is very high. In fact, for a ratio {Phi} = (HOHX),M/(Zr),M, which is just stoichiometric and is close to 4, the zirconium removal rate reaches 99%, even in industrial media. The loss of uranium is only 0.5% although its concentration is 37.4 g/L. Mechanisms of separation are not affected by a variation of pH between 6.7 and 9.8, of temperature up to 60{degree}C, and of carbonate concentration within the 15 to 60 g/L Na{sub 2}CO{sub 3} range.
- OSTI ID:
- 6128312
- Journal Information:
- Separation Science and Technology; (USA), Vol. 25:6; ISSN 0149-6395
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
URANIUM ORES
SEPARATION PROCESSES
CARBONATES
EXPERIMENTAL DATA
FLOTATION
PH VALUE
ZIRCONIUM
CARBON COMPOUNDS
DATA
ELEMENTS
INFORMATION
METALS
NUMERICAL DATA
ORES
OXYGEN COMPOUNDS
TRANSITION ELEMENTS
050400* - Nuclear Fuels- Feed Processing
400105 - Separation Procedures