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

Subject Areas : Journal of the Iranian Chemical Research

Valeri Jordanov ¹

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

Received: 2011-04-03 Accepted : 2011-07-14 Published : 2011-03-20

Keywords: Lanthanoids, Thenoyltrifluoroacetone, Benzo-15-crown-5, Synergistic extraction,

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 nitratemedium and n=2 in perchlorate medium). The values of the equilibrium constant KT,S and βT,Sare calculated. The influence of the water medium and the polarity of organic diluents on theextraction process are discussed.

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