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Effect of diluents on the synergistic solvent extraction and separation of trivalent lanthanoids with 4-benzoyl-3-phenyl-5-isoxazolone and tert-butylcalix[4]arene tetrakis(N,N-dimethyl acetamide) and structural study of Gd(III) solid complex by IR and NMR / Maria A. Petrova in Industrial & engineering chemistry research, Vol. 49 N° 13 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 6189–6195 Titre : Effect of diluents on the synergistic solvent extraction and separation of trivalent lanthanoids with 4-benzoyl-3-phenyl-5-isoxazolone and tert-butylcalix[4]arene tetrakis(N,N-dimethyl acetamide) and structural study of Gd(III) solid complex by IR and NMR Type de document : texte imprimé Auteurs : Maria A. Petrova, Auteur ; Victoria I. Lachkova, Auteur ; Nikolay G. Vassilev, Auteur Année de publication : 2010 Article en page(s) : pp. 6189–6195 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Synergistic  solvent  extraction  Diluents Résumé : The solvent extraction of 14 lanthanoid(III) ions from a chloride medium with acidic chelating extractant 4-benzoyl-3-phenyl-5-isoxazolone (HPBI) and tert-butylcalix[4]arene tetrakis(N,N-dimethylacetamide) (S) as a synergistic agent in C6H6 has been studied. In all cases, Ln(III) ions were extracted as Ln(PBI)3·S species. Positive values of the synergistic coefficients show that all lanthanoids were extracted synergistically upon the addition of compound S to the chelating extractant. The values of the equilibrium constant and the separation factors were calculated. The synergistic solvent extraction of five selected lanthanoid ions (La3+, Nd3+, Eu3+, Ho3+, and Lu3+) with a mixture of HPBI and S from a perchlorate medium in other diluents such as CHCl3, C2H4Cl2, and CCl4 has been studied too. It was found that the values of the equilibrium constant increased in the order CHCl3 < C2H4Cl2 < CCl4. The effect of the diluents on the metal extraction and separation has been discussed. A solid complex of Gd(III) with HPBI and S was synthesized. The composition of the complex was determined as Gd(PBI)3·S using elemental analysis, IR, and 1H NMR data. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100328v [article] Effect of diluents on the synergistic solvent extraction and separation of trivalent lanthanoids with 4-benzoyl-3-phenyl-5-isoxazolone and tert-butylcalix[4]arene tetrakis(N,N-dimethyl acetamide) and structural study of Gd(III) solid complex by IR and NMR [texte imprimé] / Maria A. Petrova, Auteur ; Victoria I. Lachkova, Auteur ; Nikolay G. Vassilev, Auteur . - 2010 . - pp. 6189–6195. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 6189–6195 Mots-clés : Synergistic  solvent  extraction  Diluents Résumé : The solvent extraction of 14 lanthanoid(III) ions from a chloride medium with acidic chelating extractant 4-benzoyl-3-phenyl-5-isoxazolone (HPBI) and tert-butylcalix[4]arene tetrakis(N,N-dimethylacetamide) (S) as a synergistic agent in C6H6 has been studied. In all cases, Ln(III) ions were extracted as Ln(PBI)3·S species. Positive values of the synergistic coefficients show that all lanthanoids were extracted synergistically upon the addition of compound S to the chelating extractant. The values of the equilibrium constant and the separation factors were calculated. The synergistic solvent extraction of five selected lanthanoid ions (La3+, Nd3+, Eu3+, Ho3+, and Lu3+) with a mixture of HPBI and S from a perchlorate medium in other diluents such as CHCl3, C2H4Cl2, and CCl4 has been studied too. It was found that the values of the equilibrium constant increased in the order CHCl3 < C2H4Cl2 < CCl4. The effect of the diluents on the metal extraction and separation has been discussed. A solid complex of Gd(III) with HPBI and S was synthesized. The composition of the complex was determined as Gd(PBI)3·S using elemental analysis, IR, and 1H NMR data. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100328v

Synergistic effect in the solvent extraction and separation of lanthanoids by 4 - (4 - Fluorobenzoyl) - 3 - methyl - 1 - phenyl - pyrazol - 5 - one in the presence of monofunctional neutral organophosphorus extractants / Maria A. Petrova in Industrial & engineering chemistry research, Vol. 50 N° 21 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 12170-12176 Titre : Synergistic effect in the solvent extraction and separation of lanthanoids by 4 - (4 - Fluorobenzoyl) - 3 - methyl - 1 - phenyl - pyrazol - 5 - one in the presence of monofunctional neutral organophosphorus extractants Type de document : texte imprimé Auteurs : Maria A. Petrova, Auteur ; Vanya B. Kurteva, Auteur ; Lubomir A. Lubenov, Auteur Année de publication : 2011 Article en page(s) : pp. 12170-12176 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Solvent  extraction  Synergism Résumé : 4-(4-Fluorobenzoyl)-3-methyl-1-phenyl-pyrazol-5-one (HL) has been synthesized and its complexation properties in solution were examined. Mixed ligand chelate extraction of trivalent lanthanoids (La, Nd, Eu, Ho, and Lu) from chloride medium at constant ionic strength μ = 0.1 into C6H6 with HL in combination with one of the three phosphine oxide compounds trioctylphosphine oxide (TOPO), tributylphosphine oxide (TBPO), or triphenylphosphine oxide (TPPO) as well as with tributylphosphate (TBP) was studied. The interaction between the extractants in C6H6-d6 has been studied by 1H, 13C, and 31P NMR spectroscopy and its influence on the synergistic extraction of Nd(III) ion has been investigated. The composition of the extracted species was established as LnL3·HL with HL alone and as LnL3·2S in the presence of TOPO, TPPO, and TBP or LnL3·S with the mixture of HL-TBPO. A synergic effect up to 106 was observed for the extraction of the above-mentioned lanthanoid ions with binary mixtures of extractants. The change of the synergistic agent causes a significant increase of the KL,S values. The parameters of the extraction process were determined and the separation factors were calculated. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697534 [article] Synergistic effect in the solvent extraction and separation of lanthanoids by 4 - (4 - Fluorobenzoyl) - 3 - methyl - 1 - phenyl - pyrazol - 5 - one in the presence of monofunctional neutral organophosphorus extractants [texte imprimé] / Maria A. Petrova, Auteur ; Vanya B. Kurteva, Auteur ; Lubomir A. Lubenov, Auteur . - 2011 . - pp. 12170-12176. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 12170-12176 Mots-clés : Solvent  extraction  Synergism Résumé : 4-(4-Fluorobenzoyl)-3-methyl-1-phenyl-pyrazol-5-one (HL) has been synthesized and its complexation properties in solution were examined. Mixed ligand chelate extraction of trivalent lanthanoids (La, Nd, Eu, Ho, and Lu) from chloride medium at constant ionic strength μ = 0.1 into C6H6 with HL in combination with one of the three phosphine oxide compounds trioctylphosphine oxide (TOPO), tributylphosphine oxide (TBPO), or triphenylphosphine oxide (TPPO) as well as with tributylphosphate (TBP) was studied. The interaction between the extractants in C6H6-d6 has been studied by 1H, 13C, and 31P NMR spectroscopy and its influence on the synergistic extraction of Nd(III) ion has been investigated. The composition of the extracted species was established as LnL3·HL with HL alone and as LnL3·2S in the presence of TOPO, TPPO, and TBP or LnL3·S with the mixture of HL-TBPO. A synergic effect up to 106 was observed for the extraction of the above-mentioned lanthanoid ions with binary mixtures of extractants. The change of the synergistic agent causes a significant increase of the KL,S values. The parameters of the extraction process were determined and the separation factors were calculated. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697534