Crown ethers as synergistic agents in the solvent extraction of trivalent lanthanides with 8-hydroxyquinoline-Reference-Cited by-同舟云学术

Crown ethers as synergistic agents in the solvent extraction of trivalent lanthanides with 8-hydroxyquinoline

Published:2008 Issue:1 Volume:73 Page:29-39
ISSN:0352-5139
Container-title:Journal of the Serbian Chemical Society
language:en
Short-container-title:JSCS

Author:

Atanassova M.¹

Affiliation:

1. University of Chemical Technology and Metallurgy, Department of General and Inorganic Chemistry, Sofia, Bulgaria

Abstract

The liquid extraction of the 13 lanthanides with mixtures of 8-hydro?xyquinoline (HQ) and crown ethers (S) dibenzo-18-crown-6 (DB18C6) and di?benzo-24-crown-8 (DB24C8) in 1,2-dichloroethane as a diluent from chloride medium at constant ionic strength ? = 0.1 was investigated. The composition of the extracted species was established as LnQ3 with HQ alone and as LnQ3?S in the presence of a crown ether. The values of the equilibrium constants were calculated. The addition of DB18C6 to the metal chelate system improved the extraction efficiency, while a weak synergistic enhancement was found when the metals were extracted with mixtures of HQ-DB24C8. The parameters of the extraction process were determined and the separation factors between two adjacent lanthanides(III) were calculated.

Publisher

National Library of Serbia

Subject

General Chemistry

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