Mixed ligand chelate extraction of lanthanide ions in systems involving 7-(1-vinyl-3,3,6,6-tetramethylhexyl)-8-quinolinol, 8-quinolinol, and 1,10-phenanthroline

Journal Article · Sun Nov 01 04:00:00 EST 1981 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00236a039· OSTI ID:5889055

Yamada, E; Freiser, H

A study of the equilibrium extraction behavior of a series of representative tervalent lanthanide ions, Pr, Eu, and Yb, was carried out with chloroform solutions containing either 7-dodecenyl-8-quinolinol (DDQ or HK) alone or combined with 1,10-phenanthroline (phen). The results demonstrated that the lanthanides are extracted as a simple chelate, LnK/sub 3/, or in the presence of phen, as LnK/sub 3/.phen. Solvent extraction of lanthanides has been studied further with mixtures of HK and 8-quinolinol (HQ) in chloroform. The mixed complexes in chloroform were considered to be LnK/sub 2/Q, and at higher 8-quinolinol concentration LnKQ/sub 2/, but the addition of 0.1 M phen changes the species to LnK/sub a/Q/sub 3-a/.phen complexes. The formations of mixed complexes and addition of phen improve both the extraction and separation.

• Research Organization: Univ. of Arizona, Tucson
• OSTI ID: 5889055
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 53:13; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
AZINES
CHELATES
COMPLEXES
DATA
ELEMENTS
EUROPIUM
EXPERIMENTAL DATA
EXTRACTION
HETEROCYCLIC COMPOUNDS
INFORMATION
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENANTHROLINES
PRASEODYMIUM
PYRIDINES
QUINOLINES
RARE EARTHS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
YTTERBIUM