Use of Di-(2-ethylhexyl) Orthophosphoric Acid for the Separation of the Elements Lanthanum–Gadolinium by Reverse Phase Partition Chromatography

Journal Article · Sat Apr 07 04:00:00 EST 1962 · Nature (London)

DOI:https://doi.org/10.1038/194084a0· OSTI ID:4785088

PIERCE, T. B.; PECK, P. F.

A comparatively simple scheme for rare earth separations based on a multi-stage extraction procedure utilizing di-(2-ethylhexyl) orthophosphoric acid (HDEHP) as extractant was devised. lnvestigations into the behavior of a number of support materials retaining HDEHP indicated that a poly-(vinyl chloride/vinyl acetate) copolymer, Corvic, will hold the complexing agent firmly and will give elution curves with the rare earths which show relatively little tailing. Using columns packed with Corvic retaining HDEHP it was found possible to separate small quantities of the elements La, Ce, Pr, Nd, Pm, Sm, Eu, and Gd, using normal chromatographic techniques. Good resolution of the elements was achieved by a simple gradient elution technique which relies only on the differences in the stabilities of the individual metals with HDEHP, and does not require the addition of complexing anions to the eluting phase.

• Research Organization: Atomic Energy Research Establishment, Harwell, Berks, Eng.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-014660
• OSTI ID: 4785088
• Journal Information: Nature (London), Journal Name: Nature (London) Journal Issue: 4823 Vol. 194; ISSN 0028-0836
• Publisher: Nature Publishing Group
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETATES
ADSORPTION
ALKYL RADICALS
CHLORIDES
CHROMATOGRAPHY
COMPLEXES
DEHPA
DIAGRAMS
EXTRACTION COLUMNS
GADOLINIUM
LANTHANUM
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID
POLYVINYLS
RARE EARTHS
SEPARATION PROCESSES
STABILITY
USES