Cation exchange extraction of neptunium(V) and protactinium(V) from molten nitrate salt

T. Mitsugashira; S. Suzuki

doi:10.1007/BF02519580

Cation exchange extraction of neptunium(V) and protactinium(V) from molten nitrate salt

T. Mitsugashira, S. Suzuki

Micro System Integration Center (μSIC)

Tohoku University

Research output: Contribution to journal › Article › peer-review

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Abstract

Cu-di-(2-ethylhexyl)phosphate was used as the cation exchange extractant from molten nitrate salt. IR absorption spectra of di-(2-ethylhexyl)phosphoric acid and Cu-di-(2-ethylhexyl)phosphate were compared and it was proved that the acidic form of the extractant is not Cu-di-(2-ethylhexyl)-phosphate. Using LiNO₃-NH₄NO₃ eutectic melt, it was shown that the back-extraction of Cu²⁺ is a cation exchange reaction. Np(V) and Pa(V) were extracted by Cu-di-(2-ethylhexyl)phosphate from LiNO₃-NaNO₃-KNO₃ eutectic melt. The distribution ratio of Np(V) was greater than that of Pa(V) on the contrary of their distribution ratios in the aqueous extraction system. A possible cation exchange extraction reaction was proposed for the extraction of Np(V).

Original language	English
Pages (from-to)	309-317
Number of pages	9
Journal	Journal of Radioanalytical Chemistry
Volume	34
Issue number	2
DOIs	https://doi.org/10.1007/BF02519580
Publication status	Published - 1976 Sept

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title = "Cation exchange extraction of neptunium(V) and protactinium(V) from molten nitrate salt",

abstract = "Cu-di-(2-ethylhexyl)phosphate was used as the cation exchange extractant from molten nitrate salt. IR absorption spectra of di-(2-ethylhexyl)phosphoric acid and Cu-di-(2-ethylhexyl)phosphate were compared and it was proved that the acidic form of the extractant is not Cu-di-(2-ethylhexyl)-phosphate. Using LiNO3-NH4NO3 eutectic melt, it was shown that the back-extraction of Cu2+ is a cation exchange reaction. Np(V) and Pa(V) were extracted by Cu-di-(2-ethylhexyl)phosphate from LiNO3-NaNO3-KNO3 eutectic melt. The distribution ratio of Np(V) was greater than that of Pa(V) on the contrary of their distribution ratios in the aqueous extraction system. A possible cation exchange extraction reaction was proposed for the extraction of Np(V).",

author = "T. Mitsugashira and S. Suzuki",

year = "1976",

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doi = "10.1007/BF02519580",

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volume = "34",

pages = "309--317",

journal = "Journal of Radioanalytical Chemistry",

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TY - JOUR

T1 - Cation exchange extraction of neptunium(V) and protactinium(V) from molten nitrate salt

AU - Mitsugashira, T.

AU - Suzuki, S.

PY - 1976/9

Y1 - 1976/9

N2 - Cu-di-(2-ethylhexyl)phosphate was used as the cation exchange extractant from molten nitrate salt. IR absorption spectra of di-(2-ethylhexyl)phosphoric acid and Cu-di-(2-ethylhexyl)phosphate were compared and it was proved that the acidic form of the extractant is not Cu-di-(2-ethylhexyl)-phosphate. Using LiNO3-NH4NO3 eutectic melt, it was shown that the back-extraction of Cu2+ is a cation exchange reaction. Np(V) and Pa(V) were extracted by Cu-di-(2-ethylhexyl)phosphate from LiNO3-NaNO3-KNO3 eutectic melt. The distribution ratio of Np(V) was greater than that of Pa(V) on the contrary of their distribution ratios in the aqueous extraction system. A possible cation exchange extraction reaction was proposed for the extraction of Np(V).

AB - Cu-di-(2-ethylhexyl)phosphate was used as the cation exchange extractant from molten nitrate salt. IR absorption spectra of di-(2-ethylhexyl)phosphoric acid and Cu-di-(2-ethylhexyl)phosphate were compared and it was proved that the acidic form of the extractant is not Cu-di-(2-ethylhexyl)-phosphate. Using LiNO3-NH4NO3 eutectic melt, it was shown that the back-extraction of Cu2+ is a cation exchange reaction. Np(V) and Pa(V) were extracted by Cu-di-(2-ethylhexyl)phosphate from LiNO3-NaNO3-KNO3 eutectic melt. The distribution ratio of Np(V) was greater than that of Pa(V) on the contrary of their distribution ratios in the aqueous extraction system. A possible cation exchange extraction reaction was proposed for the extraction of Np(V).

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ER -

Cation exchange extraction of neptunium(V) and protactinium(V) from molten nitrate salt

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