GROUP SEPARATION OF THE ACTINIDES FROM THE LANTHANIDES BY ANION EXCHANGE

Journal Article · Thu Jun 01 04:00:00 EDT 1961 · J. Inorg. & Nuclear Chem.

DOI:https://doi.org/10.1016/0022-1902(61)80161-9· OSTI ID:4040376

Hulet, E K; Gutmacher, R G; Coops, M S

The separation of the lanthanides from the tripositive actinides was accomplished by column elution with lOM LiCl solutions or stronger using a moderately cross-linked, strongly basic, anion exchange resin at an elevated temperature. Fractionation of the actinide ions into the groups Pu, Am-Cm, Bk, and Cf-Es can be obtained during the same column elution. The distribution coefficient D/sub v/ of representative actinides and lanthanides was investigated as a function of LiCl and H/sup +/ concentration, temperature, and cross-linkage of the resin, using the column elution technique. In addition, adsorption kinetics were investigated by measurement of Am elution peak half-widths over a range of flow-rates at 25 and 87 deg C with 2, 8, and 10% DVB resin of several particle sizes. The formation of anionic complexes is markedly influenced by the LiCl and H/sup +/ concentrations. D/sub v/ for La, Lu, Am, and Cf uniformly decreased by nearly one-forth when the H/sup +/ concentration was increased from 0.1 to l.OM, while maintaining the chloride ion concentration constant at 10.15M. Except for deviations observed in the elution order of Gd and Ho and their corresponding actinide homologs, Cm and Es, the elution sequence proceeded in order of increasing atomic number, La being the least strongly adsorbed. Under acceptable operating conditions the ratio D/sub v/(Am)/D/sub v/(La) = 19. (auth)

• Research Organization: Univ. of California, Livermore
• NSA Number: NSA-15-023427
• OSTI ID: 4040376
• Journal Information: J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 17
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ACTINIDES
ADSORPTION
AMERICIUM
ANIONS
BERKELIUM
CALIFORNIUM
CHEMISTRY
COMPLEXES
CURIUM
DISTRIBUTION
EINSTEINIUM
GADOLINIUM
HOLMIUM
ION EXCHANGE
LANTHANIDES
LANTHANUM
LITHIUM CHLORIDES
LUTETIUM
MEASURED VALUES
PLUTONIUM
RARE EARTHS
RESINS
SEPARATION PROCESSES
SOLUTIONS