A STUDY OF THE EXTRACTION OF THE RARE EARTHS BY ACETYLACETONE (thesis)
Technical Report
·
OSTI ID:4179289
Acetylacetone extracts the lanthanons from aqueous solution at pH values between 4 and 8. The solubility and extractability of the rare earth acetylacetonates vary with the ionic radii of the central metul ion. Extractability is enhanced by the increase in acidity of the rare earth ions. Separations of the rare earths by this system are based on variations in solubility and in the partition coefficients of the rare earth acetylacetonates. Differences in the pH values where these chelates extract promote only fractional separation. The rare earths above dysprosium are readily separated by counter- current extraction in a thirtytube Craig apparatus. Yttrium, dysprosium, and terbium show little separation by countercurrent extraction after twenty-nine transfers. However, the lanthanons below terbium show some separation by counter- current extraction. The extraction data for the rare earth acetylacetonates were used to calculate the formation constants of these chelates. (auth)
- Research Organization:
- Kentucky. Univ., Lexington
- NSA Number:
- NSA-14-019025
- OSTI ID:
- 4179289
- Report Number(s):
- ORO-271
- Country of Publication:
- United States
- Language:
- English
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