caa a22 4500 37888185X CHVBK 20180305123433.0 cr unu---uuuuu 161128e20030301xx s 000 0 eng 10.1524/ract.91.3.163.19981 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.3.163.19981 Enhanced extraction and separation of trivalent lanthanoids with 3-phenyl-4-(4-fluorobenzoyl)-5-isoxazolone and dicyclohexano-18-crown-6 [Elektronische Daten] [Rani Pavithran, M.L.P. Reddy] The synergistic extraction of trivalent lanthanoids Nd, Eu and Tm with mixtures of 3-phenyl-4-(4-fluorobenzoyl)-5-isoxazolone (HFBPI) and dicyclohexano-18-crown-6 (DC18C6) in 1,2-dichloroethane from nitrate solutions has been investigated. The results demonstrated that these trivalent lanthanoids were extracted into 1,2-dichloroethane as Ln(FBPI)3 with HFBPI alone and as Ln(FBPI)3· DC18C6 in the presence of crown ether. The equilibrium constants of the above extracted complexes have been deduced by non-linear regression analysis. The equilibrium constants of the synergistic species were found to increase monotonically with decrease in ionic radii of these metal ions. The addition of a crown ether to the metal chelate system not only enhanced the extraction efficiency significantly but also improved the selectivites among these trivalent lanthanoids. Solid complexes of these metal ions with HFBPI and with mixtures of HFBPI and crown ether have also been isolated and characterised by IR and 1H NMR spectroscopic techniques. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Pavithran Rani aut Reddy M.L.P. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/3/2003(2003-03-01), 163-168 0033-8230 91:3/2003<163 2003 91 ract https://doi.org/10.1524/ract.91.3.163.19981 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.3.163.19981 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pavithran Rani aut NATIONALLICENCE 700 1- Reddy M.L.P. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/3/2003(2003-03-01), 163-168 0033-8230 91:3/2003<163 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter