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3. Di-[trioctyl-(8-phenyloctyl)-phosphonium] pamoate: synthesis and characterization of a novel, highly hydrophobic ionic liquid for the extraction of scandium, thorium and uranium.

Author

Gradwohl, Andreas, Windisch, Jakob, Rosner, Alexander, Heninger, Julia, Fuhrmann, Philipp L., Wallner, Gabriele, Keppler, Bernhard K., Kandioller, Wolfgang, and Jirsa, Franz

Subjects
RARE earth metals, LIQUID metals, IONIC liquids, NITRIC acid, THORIUM, URANIUM
Abstract

We synthesized and characterized a novel, task-specific ionic liquid for metal extraction with considerably reduced leaching behavior compared to similar, phosphonium-based ionic liquids. The synthesis involves the design of the novel compound [TOPP]2[PAM] featuring both a highly hydrophobic cation and a functional anion. The characterization of the novel ionic liquid confirmed the formation of the desired structure and sufficient purity. The high viscosity of [TOPP]2[PAM] is responsible for the comparably high working temperature of 50°C. Extraction experiments demonstrated the suitability of [TOPP]2[PAM] for extracting Sc, Th and U from aqueous matrices, whereby extraction efficacies of 87.3% ± 9.1% (Sc), 95.8% ± 2.3% (Th) and 92.7% ± 0.3% (U) were achieved over 24 h. Furthermore, Sc could be separated to a high degree via selective extraction from Th as well as from the rare earth elements Y, La, Ce, Nd, Eu, Ho and Lu. Th was separated from La, Ce, Nd, Eu, Ho and Lu at pH 1.00. During all extraction experiments, leaching into the aqueous extraction matrix peaked at only 0.134% ± 0.011% after 24 h. The loading capacities for [TOPP]2[PAM] differed between the investigated metals, the highest values being achieved for U. After extraction, 82.7% ± 2.8% of the extracted Sc could be recovered from the IL using nitric acid (10%), but less of Th and U. [ABSTRACT FROM AUTHOR]

Published
2024
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43. Ingredient-Dependent Extent of Lipid Oxidation in Margarine

Author

Fruehwirth, Sarah, primary, Egger, Sandra, additional, Kurzbach, Dennis, additional, Windisch, Jakob, additional, Jirsa, Franz, additional, Flecker, Thomas, additional, Ressler, Miriam, additional, Reiner, Agnes T., additional, Firat, Nesrin, additional, and Pignitter, Marc, additional

Published
2021
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50. Extraction of natural radionuclides from aqueous solutions by novel maltolate-based task-specific ionic liquids

Author

Platzer, Sonja, Sap, Orhan, Leyma, Raphlin, Wallner, Gabriele, Jirsa, Franz, Kandioller, Wolfgang, Krachler, Regina, and Keppler, Bernhard K.

Subjects
Inorganic Chemistry, Nuclear Energy and Engineering, Maltol, Natural radionuclides, Extraction of radionuclides, Article, Analytical Chemistry, Ionic liquids
Abstract

Two novel maltol-based ionic liquids, namely [A336][Mal] and [C101][Mal], were synthesized as potential extracting agents for radionuclides from water. These two room temperature task-specific ionic liquids could be easily prepared by anion metathesis starting from commercially available materials. The isolated compounds were characterized by standard analytical methods. Their application as extraction agent for Unat., 234Th, 210Pb, 210Bi, 210Po and 226Ra was elucidated by liquid–liquid extraction and scintillation counting. Uranium was totally extracted by both ionic liquids over a broad pH range (2–8), while the other radionuclides were removed with differing efficacies depending on the respective pH value. Electronic supplementary material The online version of this article (doi:10.1007/s10967-014-3782-x) contains supplementary material, which is available to authorized users.

Published
2014

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