Some properties of yttrium and rare-earth N'-methylethylenediamine-N',N,N- triacetate complexes

Thesis/Dissertation · Mon Apr 01 04:00:00 EDT 1974

OSTI ID:4336462

Johnson, D A

The synthesis of MEDTA is complicated by its high solubility in water. It is, however, retained on acid-form ion-exchange resin, allowing ion-exchange chromatography to be useful in isolation of this compound from the reaction mixture. The overall yield was observed to be 71%. Ion-exchange separations of the heavy rare earths with MEDTA show that the elution order is as predicted by the formation constants of the complexes. The HETP values for these separations at room temperature are somewhat smaller than those for separations with HEDTA under similar conditions. The HETP values for the two ligands at high temperature are quite similar. (LK)

• Research Organization: Ames Lab., Iowa (USA)
• DOE Contract Number: W-7405-ENG-82
• NSA Number: NSA-29-029055
• OSTI ID: 4336462
• Report Number(s): IS-T--612
• Country of Publication: United States
• Language: English

Related Subjects

*CERIUM-- ION EXCHANGE
*EUROPIUM-- ION EXCHANGE
*GADOLINIUM-- ION EXCHANGE
*LANTHANUM-- ION EXCHANGE
*NEODYMIUM-- ION EXCHANGE
*PRASEODYMIUM-- ION EXCHANGE
*SAMARIUM-- ION EXCHANGE
*TERBIUM-- ION EXCHANGE
CARBOXYLIC ACIDS
N40140* --Chemistry--Separation Procedures
RARE EARTH COMPLEXES
YTTRIUM COMPLEXES