ThuliumV1, Istex, Corpus, bibRecord, 000923

Synergic solvent extraction of lanthanides with mixtures of aliphatic fluorinated β-diketones and organophosphorus donors

Identifieur interne : 000923 ( Istex/Corpus ); précédent : 000922; suivant : 000924

Synergic solvent extraction of lanthanides with mixtures of aliphatic fluorinated β-diketones and organophosphorus donors

Auteurs : James W. Mitchel ; Charles V. Banks

Source :

Talanta [ 0039-9140 ] ; 1972.

RBID : ISTEX:29C3A0341A8F4BAD5DC149D0A7BC19DB1D893AC1

English descriptors

Abstract

Abstract: The extraction of lanthanides from an aqueous acetatechloride medium into cyclohexane solutions of trifluoroacetylacetone, hexafluoroacetylacctone, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione and tri-n-butyl phosphate was studied. The extraction properties of other fluorinated aliphatic β-diketones and fluoroorganophosphates were also investigated. The efficiency of the extraction of the lanthanides, the composition of the complexes transferred to the organic phase and the extraction and stability constants for the synergic reactions were determined. Synergic extraction, as a technique for the preparation of lanthanide species, was evaluated for compatibility with subsequent gas chromatography. The lanthanides were found to be rapidly and quantitatively transferred into organic phases containing mixtures of fluorinated aliphatic β-diketones and TBP. The resulting mixed complexes that contained fully fluorinated β-diketones had a distinct stoichiometry and were thermodynamically more stable dan similar mixed complexes of partially fluorinated β-diketones. These properties of the synergic systems allow precise control of the formation of anhydrous complexes in the organic phase and are compatible with the use of these systems for gas chromatography.

Url:

https://api.istex.fr/document/29C3A0341A8F4BAD5DC149D0A7BC19DB1D893AC1/fulltext/pdf

DOI: 10.1016/0039-9140(72)80056-0

Links to Exploration step

ISTEX:29C3A0341A8F4BAD5DC149D0A7BC19DB1D893AC1

Le document en format XML

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<front><div type="abstract" xml:lang="en">Abstract: The extraction of lanthanides from an aqueous acetatechloride medium into cyclohexane solutions of trifluoroacetylacetone, hexafluoroacetylacctone, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione and tri-n-butyl phosphate was studied. The extraction properties of other fluorinated aliphatic β-diketones and fluoroorganophosphates were also investigated. The efficiency of the extraction of the lanthanides, the composition of the complexes transferred to the organic phase and the extraction and stability constants for the synergic reactions were determined. Synergic extraction, as a technique for the preparation of lanthanide species, was evaluated for compatibility with subsequent gas chromatography. The lanthanides were found to be rapidly and quantitatively transferred into organic phases containing mixtures of fluorinated aliphatic β-diketones and TBP. The resulting mixed complexes that contained fully fluorinated β-diketones had a distinct stoichiometry and were thermodynamically more stable dan similar mixed complexes of partially fluorinated β-diketones. These properties of the synergic systems allow precise control of the formation of anhydrous complexes in the organic phase and are compatible with the use of these systems for gas chromatography.</div>
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<abstract xml:lang="en"><p>The extraction of lanthanides from an aqueous acetatechloride medium into cyclohexane solutions of trifluoroacetylacetone, hexafluoroacetylacctone, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione and tri-n-butyl phosphate was studied. The extraction properties of other fluorinated aliphatic β-diketones and fluoroorganophosphates were also investigated. The efficiency of the extraction of the lanthanides, the composition of the complexes transferred to the organic phase and the extraction and stability constants for the synergic reactions were determined. Synergic extraction, as a technique for the preparation of lanthanide species, was evaluated for compatibility with subsequent gas chromatography. The lanthanides were found to be rapidly and quantitatively transferred into organic phases containing mixtures of fluorinated aliphatic β-diketones and TBP. The resulting mixed complexes that contained fully fluorinated β-diketones had a distinct stoichiometry and were thermodynamically more stable dan similar mixed complexes of partially fluorinated β-diketones. These properties of the synergic systems allow precise control of the formation of anhydrous complexes in the organic phase and are compatible with the use of these systems for gas chromatography.</p>
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<abstract xml:lang="de"><p>Zusammenfassung: Es wurde die Ausscheidung von Lanthaniden aus einem wässrigen Cloracetatmedium in Hexamethylenlösungen von Trifluoracctylaceton, Hexafluoracetylaceton, 6,6,7,7,8,8,8-Heptafluor2, 2-Äthan-3, 5-Oktanedion und Tri-n-Butylphosphat untersucht. Auch wurden die Ausscheidungseigenschaften anderer, fluorierter, aliphatischer β-Diketone und Fluororganophosphate untersucht. Es wurde die Wirksamkeit der Ausscheidung der Lanthaniden. die Zusammensetzung der Komplexverbindungen, welche in die organische Phase übergingen, und die Ausscheidung und Beständigkeitskonstanten für die synergetischen Reaktionen bestimmt. Es wurde die synergetische Ausscheidung ab ein Verfahren für die Vorbereitung von Lanthanidenarten im Hinblick auf Vereinbarkeit mit danachfolgender Gaschromatographie beurteilt. Es wurde gefunden, dass die Lanthaniden schnell und in Mengen in organische Phasen mit Mischungen von fluorierten aliphatischen β-Diketonen und TBP übergingen. Die resultierenden gemischten Komplexverbindungen enthielten voll fluorlerte β-Diketone, hatten eine deutliche Stöchiometrie und waren thermodynamisch beständiger als ähnliche Mischkomplexverbindungen von teilweise fluorierten β-Diktonen. Diese Eigenschaften der synergetischen Systeme ermöglichen genaue Kontrolle der Bildung anhydrischer Komplexverbindungen in der organischen Phase und sind mit Benutzung dieser Systeme mit Gas chromatographie vereinbar.</p>
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<abstract xml:lang="fr"><p>Résumé: On a étudié l'extraction de lanthanides d'un milieu aqueux acétate-chlorure dans des solutions en cyclohexanc de trifluoracétylacétone, hexafluoracétylacétone, 6,6,7,7,8,8,8-heptafluoro 2,2-diméthyl 3, 5-octanedione et tri-n-butyl phosphate. On a aussi examiné les propriétés d'extraction d'autres β-dicétones aliphatiques fluorées et fluoro-organophosphates. On a déterminé l'efficacité de l'extraction des lanthanides, la composition dea complexes transférés dans la phase organique et les constantes d'extraction et de stabilité pour les réactions synergiques. On a évalué l'extraction synergique, en tant que technique pour la préparation de l'espèce lanthanide, pour sa compatibilité avec une chromatographie en phase gazeuse subséquente. On a trouve que les lanthanides sont transférés rapidement et quantitativement dans des phases organiques contenant des mélanges de β-diacétooes aliphatiques fluorées et de TBP. Les complexes mixtes résultants contenant des β-dicétones totalement fluorées ont une stoechiométrie distincte et sont thermodynamiquement plus stables que les complexes mixtes similaires de β-dicétones partiellement fluorées. Ces propriétés des systèmes synergiques permettent un contrôle précis de la formation de complexes anhydres dans la phase organique et sont compatibles avec l'emploi de ces systèmes avec la chromatographie en phase gazeuse.</p>
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<ce:date-received day="24" month="8" year="1971"></ce:date-received>
<ce:date-accepted day="31" month="1" year="1972"></ce:date-accepted>
<ce:abstract><ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec><ce:simple-para>The extraction of lanthanides from an aqueous acetatechloride medium into cyclohexane solutions of trifluoroacetylacetone, hexafluoroacetylacctone, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione and tri-n-butyl phosphate was studied. The extraction properties of other fluorinated aliphatic β-diketones and fluoroorganophosphates were also investigated. The efficiency of the extraction of the lanthanides, the composition of the complexes transferred to the organic phase and the extraction and stability constants for the synergic reactions were determined. Synergic extraction, as a technique for the preparation of lanthanide species, was evaluated for compatibility with subsequent gas chromatography. The lanthanides were found to be rapidly and quantitatively transferred into organic phases containing mixtures of fluorinated aliphatic β-diketones and TBP. The resulting mixed complexes that contained fully fluorinated β-diketones had a distinct stoichiometry and were thermodynamically more stable dan similar mixed complexes of partially fluorinated β-diketones. These properties of the synergic systems allow precise control of the formation of anhydrous complexes in the organic phase and are compatible with the use of these systems for gas chromatography.</ce:simple-para>
</ce:abstract-sec>
</ce:abstract>
<ce:abstract xml:lang="de"><ce:section-title>Zusammenfassung</ce:section-title>
<ce:abstract-sec><ce:simple-para>Es wurde die Ausscheidung von Lanthaniden aus einem wässrigen Cloracetatmedium in Hexamethylenlösungen von Trifluoracctylaceton, Hexafluoracetylaceton, 6,6,7,7,8,8,8-Heptafluor2, 2-Äthan-3, 5-Oktanedion und Tri-<ce:italic>n</ce:italic>
-Butylphosphat untersucht. Auch wurden die Ausscheidungseigenschaften anderer, fluorierter, aliphatischer β-Diketone und Fluororganophosphate untersucht. Es wurde die Wirksamkeit der Ausscheidung der Lanthaniden. die Zusammensetzung der Komplexverbindungen, welche in die organische Phase übergingen, und die Ausscheidung und Beständigkeitskonstanten für die synergetischen Reaktionen bestimmt. Es wurde die synergetische Ausscheidung ab ein Verfahren für die Vorbereitung von Lanthanidenarten im Hinblick auf Vereinbarkeit mit danachfolgender Gaschromatographie beurteilt. Es wurde gefunden, dass die Lanthaniden schnell und in Mengen in organische Phasen mit Mischungen von fluorierten aliphatischen β-Diketonen und TBP übergingen. Die resultierenden gemischten Komplexverbindungen enthielten voll fluorlerte β-Diketone, hatten eine deutliche Stöchiometrie und waren thermodynamisch beständiger als ähnliche Mischkomplexverbindungen von teilweise fluorierten β-Diktonen. Diese Eigenschaften der synergetischen Systeme ermöglichen genaue Kontrolle der Bildung anhydrischer Komplexverbindungen in der organischen Phase und sind mit Benutzung dieser Systeme mit Gas chromatographie vereinbar.</ce:simple-para>
</ce:abstract-sec>
</ce:abstract>
<ce:abstract xml:lang="fr"><ce:section-title>Résumé</ce:section-title>
<ce:abstract-sec><ce:simple-para>On a étudié l'extraction de lanthanides d'un milieu aqueux acétate-chlorure dans des solutions en cyclohexanc de trifluoracétylacétone, hexafluoracétylacétone, 6,6,7,7,8,8,8-heptafluoro 2,2-diméthyl 3, 5-octanedione et tri-<ce:italic>n</ce:italic>
-butyl phosphate. On a aussi examiné les propriétés d'extraction d'autres β-dicétones aliphatiques fluorées et fluoro-organophosphates. On a déterminé l'efficacité de l'extraction des lanthanides, la composition dea complexes transférés dans la phase organique et les constantes d'extraction et de stabilité pour les réactions synergiques. On a évalué l'extraction synergique, en tant que technique pour la préparation de l'espèce lanthanide, pour sa compatibilité avec une chromatographie en phase gazeuse subséquente. On a trouve que les lanthanides sont transférés rapidement et quantitativement dans des phases organiques contenant des mélanges de β-diacétooes aliphatiques fluorées et de TBP. Les complexes mixtes résultants contenant des β-dicétones totalement fluorées ont une stoechiométrie distincte et sont thermodynamiquement plus stables que les complexes mixtes similaires de β-dicétones partiellement fluorées. Ces propriétés des systèmes synergiques permettent un contrôle précis de la formation de complexes anhydres dans la phase organique et sont compatibles avec l'emploi de ces systèmes avec la chromatographie en phase gazeuse.</ce:simple-para>
</ce:abstract-sec>
</ce:abstract>
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<name type="personal"><namePart type="given">James W.</namePart>
<namePart type="family">Mitchel</namePart>
<affiliation>Institute for Atomic Research and Department of Chemistry, Iowa State University, Ames, Iowa 50010, U.S.A.</affiliation>
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<name type="personal"><namePart type="given">Charles V.</namePart>
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<affiliation>Institute for Atomic Research and Department of Chemistry, Iowa State University, Ames, Iowa 50010, U.S.A.</affiliation>
<description>Deceased 29 February 1971.</description>
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<abstract lang="en">Abstract: The extraction of lanthanides from an aqueous acetatechloride medium into cyclohexane solutions of trifluoroacetylacetone, hexafluoroacetylacctone, 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione and tri-n-butyl phosphate was studied. The extraction properties of other fluorinated aliphatic β-diketones and fluoroorganophosphates were also investigated. The efficiency of the extraction of the lanthanides, the composition of the complexes transferred to the organic phase and the extraction and stability constants for the synergic reactions were determined. Synergic extraction, as a technique for the preparation of lanthanide species, was evaluated for compatibility with subsequent gas chromatography. The lanthanides were found to be rapidly and quantitatively transferred into organic phases containing mixtures of fluorinated aliphatic β-diketones and TBP. The resulting mixed complexes that contained fully fluorinated β-diketones had a distinct stoichiometry and were thermodynamically more stable dan similar mixed complexes of partially fluorinated β-diketones. These properties of the synergic systems allow precise control of the formation of anhydrous complexes in the organic phase and are compatible with the use of these systems for gas chromatography.</abstract>
<abstract lang="de">Zusammenfassung: Es wurde die Ausscheidung von Lanthaniden aus einem wässrigen Cloracetatmedium in Hexamethylenlösungen von Trifluoracctylaceton, Hexafluoracetylaceton, 6,6,7,7,8,8,8-Heptafluor2, 2-Äthan-3, 5-Oktanedion und Tri-n-Butylphosphat untersucht. Auch wurden die Ausscheidungseigenschaften anderer, fluorierter, aliphatischer β-Diketone und Fluororganophosphate untersucht. Es wurde die Wirksamkeit der Ausscheidung der Lanthaniden. die Zusammensetzung der Komplexverbindungen, welche in die organische Phase übergingen, und die Ausscheidung und Beständigkeitskonstanten für die synergetischen Reaktionen bestimmt. Es wurde die synergetische Ausscheidung ab ein Verfahren für die Vorbereitung von Lanthanidenarten im Hinblick auf Vereinbarkeit mit danachfolgender Gaschromatographie beurteilt. Es wurde gefunden, dass die Lanthaniden schnell und in Mengen in organische Phasen mit Mischungen von fluorierten aliphatischen β-Diketonen und TBP übergingen. Die resultierenden gemischten Komplexverbindungen enthielten voll fluorlerte β-Diketone, hatten eine deutliche Stöchiometrie und waren thermodynamisch beständiger als ähnliche Mischkomplexverbindungen von teilweise fluorierten β-Diktonen. Diese Eigenschaften der synergetischen Systeme ermöglichen genaue Kontrolle der Bildung anhydrischer Komplexverbindungen in der organischen Phase und sind mit Benutzung dieser Systeme mit Gas chromatographie vereinbar.</abstract>
<abstract lang="fr">Résumé: On a étudié l'extraction de lanthanides d'un milieu aqueux acétate-chlorure dans des solutions en cyclohexanc de trifluoracétylacétone, hexafluoracétylacétone, 6,6,7,7,8,8,8-heptafluoro 2,2-diméthyl 3, 5-octanedione et tri-n-butyl phosphate. On a aussi examiné les propriétés d'extraction d'autres β-dicétones aliphatiques fluorées et fluoro-organophosphates. On a déterminé l'efficacité de l'extraction des lanthanides, la composition dea complexes transférés dans la phase organique et les constantes d'extraction et de stabilité pour les réactions synergiques. On a évalué l'extraction synergique, en tant que technique pour la préparation de l'espèce lanthanide, pour sa compatibilité avec une chromatographie en phase gazeuse subséquente. On a trouve que les lanthanides sont transférés rapidement et quantitativement dans des phases organiques contenant des mélanges de β-diacétooes aliphatiques fluorées et de TBP. Les complexes mixtes résultants contenant des β-dicétones totalement fluorées ont une stoechiométrie distincte et sont thermodynamiquement plus stables que les complexes mixtes similaires de β-dicétones partiellement fluorées. Ces propriétés des systèmes synergiques permettent un contrôle précis de la formation de complexes anhydres dans la phase organique et sont compatibles avec l'emploi de ces systèmes avec la chromatographie en phase gazeuse.</abstract>
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Synergic solvent extraction of lanthanides with mixtures of aliphatic fluorinated β-diketones and organophosphorus donors

Synergic solvent extraction of lanthanides with mixtures of aliphatic fluorinated β-diketones and organophosphorus donors

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