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Solvent extraction of lanthanide ions with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (HPMBP), II. Extraction of erbium(III), ytterbium(III) and lutetium(III) by HPMBP from aqueous-methanol solutions

Extraktion von Seltenerdmetall-Ionen mit 1-Phenyl-3-methyl-4-benzoyl-pyrazolon-5 (HPMBP), II. Extraktion von Er(III), Yb(III) und Lu(III) aus Wasser-Methanol-Lösungen

  • Anorganische Und Physikalische Chemie
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Abstract

The solvent extraction of lanthanides(III) (Ln=Er, Yb, Lu) by 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (HL) in carbon tetrachloride from aqueous-methanol phase was investigated. The equilibrium constants for the extraction from aqueous −50% (v/v) methanol phase (K ex ), two-phase stability constants of the complexesLnL 3 (β *3 ) and stability constants of complexesLnL 2+,LnL +2 ,LnL 3 (β n ) (Ln=Yb, Lu) were calculated. It was confirmed that the addition of methanol to the aqueous phase causes a synergistic effect. The influence of methanol on the dissociation constant of HPMBP (K a ) and the distribution constant of HPMBP (p HL ) between carbon tetrachloride and water-methanol solutions was investigated.

Zusammenfassung

Die Extraktion von Lanthaniden (Ln=Er, Yb, Lu) mittels 1-Phenyl-3-methyl-4-benzoyl-pyrazolon-5 (HL) in Kohlenstofftetrachlorid aus Wasser-Methanol Phase wurde untersucht. Die Werte der Gleichgewichtskonstante für Extraktion aus Wasser −50% (v/v) Methanol-Phase (K ex ), der zweiphasigen Beständigkeitskonstante für die KomplexeLnL 3 (β *3 ), sowie der Stabilitätskonstante des KomplexesLnL 2+,LnL +2 undLnL 3 (β n ) (Ln=Yb, Lu), wurden berechnet. Es wurde festgestellt, daß die Zugabe von Methanol zur wäßrigen Phase einen synergistischen Effekt hat. Der Einfluß von Methanol auf die Dissoziationskonstante von HPMBP (K a ) und die Verteilungskonstante des HPMBP (p HL zwischen organischer und wäßrig-methanolischer Phase wurde untersucht.

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Authors and Affiliations

  1. Institute of General Chemistry, Technical University, PL-90-924, Łódź, Poland

    D. M. Czakis-Sulikowska, B. Kuźnik & A. Malinowska

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  1. D. M. Czakis-Sulikowska
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  2. B. Kuźnik
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  3. A. Malinowska
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Czakis-Sulikowska, D.M., Kuźnik, B. & Malinowska, A. Solvent extraction of lanthanide ions with 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (HPMBP), II. Extraction of erbium(III), ytterbium(III) and lutetium(III) by HPMBP from aqueous-methanol solutions. Monatsh Chem 121, 585–592 (1990). https://doi.org/10.1007/BF00809760

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  • DOI: https://doi.org/10.1007/BF00809760

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