Solvent extraction of Gd(III) from perchlorate and nitrate media with mixtures of thenoyltrifluoroacetone and Benzo-15-Crown-5

Author

Department of General and Inorganic Chemistry, University of Chemical Technology and Metallurgy, 8 Kliment Okhridski Blvd., 1756 Sofia, Bulgaria

Abstract

The extraction of Gadolinium (Gd) from perchlorate and nitrate media in 1,2-dichloroethane
(C2H4Cl2), carbon tetrachloride (CCl4) and chloroform (CHCl3) by mixtures of 2-
thenoyltrifluoroacetone (HTTA) and a crown ether benzo-15-crown-5 (B15C5) is investigated.
The composition of the extracted species is determined as Gd(TTA)3.nB15C5 (n=1 in nitrate
medium and n=2 in perchlorate medium). The values of the equilibrium constant KT,S and βT,S
are calculated. The influence of the water medium and the polarity of organic diluents on the
extraction process are discussed.

Keywords


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