Extraction and Separation between Light and Heavy Lanthanides by N,N,N′,N′-Tetraoctyl-diglycolamide from Organic Acid

Lanthanide (Ln) extractions from organic acids to n-dodecane by N,N,N′,N′-tetraoctyl-diglycolamide (TODGA) were conducted. Four organic acids (lactic acid, malonic acid, tartaric acid, and citric acid) were employed. Although these acids stabilize lanthanides in the aqueous phase, a distribution rat...

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Veröffentlicht in:Chemistry letters 2020-10, Vol.49 (10), p.1216-1219
Hauptverfasser: Sasaki, Yuji, Matsumiya, Masahiko, Nakase, Masahiko, Takeshita, Kenji
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Sprache:eng
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Zusammenfassung:Lanthanide (Ln) extractions from organic acids to n-dodecane by N,N,N′,N′-tetraoctyl-diglycolamide (TODGA) were conducted. Four organic acids (lactic acid, malonic acid, tartaric acid, and citric acid) were employed. Although these acids stabilize lanthanides in the aqueous phase, a distribution ratio (D) greater 1 was obtained for heavy Ln. Ln patterns (D(Ln) against atomic number of Ln) show maximum values of Ho and Er. In order to obtain high D values, the addition of HNO3 in aqueous phase was found to be effective.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.200431