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Imaizumi, Hirobumi; Ban, Yasutoshi; Asakura, Toshihide; Morita, Yasuji
JAEA-Technology 2006-043, 45 Pages, 2006/09
JAEA-Technology-2006-043.pdf:14.96MB
In JAEA, the solvent washing properties of n-butylamine compounds, which can be decomposed by incineration or electrolysis, have been investigated using simulated and real degraded tributylphosphate (TBP) solvent. Ion chromatography has been utilized as an analytical method to determine the concentration of dibutylphosphoric acid (DBP) in organic and aqueous phases. Recently, we met difficulty to maintain the reliability of analytical results. A gas chromatograph-mass spectroscope (GC-MS) was considered as new analytical method to solve these problems. As a result, it was confirmed that improved reliability of analysis can be obtained by utilizing a sample pre-treatment method to introduce tetra methyl silyl substituent to the target molecule, DBP. In a chromatogram, monobutylphosphoric acid also gave good peaks. I can be expected to analyze DBP and MBP simultaneously with only one sample in the TBP solvent.
Imaizumi, Hirobumi; Ban, Yasutoshi; Sato, Makoto; Asakura, Toshihide; Morita, Yasuji
JAERI-Research 2005-025, 94 Pages, 2005/09
JAERI-Research-2005-025.pdf:13.61MB
Washing properties of n-butylamine compounds, which are decomposable by burning or electrolysis, for dibutylphosphoric acid (DBP) and Zr in real and simulated degraded solvents have been investigated. In experiments with simulated degraded solvents, basic properties of n-butylamine compounds for washing DBP and Zr were examined and optimum condition was obtained. It was confirmed from the simulated degraded solvent washing tests that 0.25 mol/dm
n-butylamine oxalate of pH 2 could effectively remove Zr from the degraded solvent and the solution of pH 4 was effective for DBP, 95% removal of Zr and DBP were obtained by batch washing. The validity of n-butylamine as a degraded solvent wash reagent was shown by the washing test for real degraded solvent that was performed by continuous counter current flow using a miniature mixer-settler. The present study was carried out as a part of the joint study "Research and Development of Process Elements in an Advanced Aqueous Reprocessing" between Japan Nuclear Cycle Development Institute and JAERI.
Asakura, Toshihide; Imaizumi, Hirobumi; Sasaki, Yuji; Kitatsuji, Yoshihiro; Morita, Yasuji; Kimura, Takaumi
no journal, ,
Total TRU separation technology using diglycolamide as an extraction solvent has been developed to apply it to the MA separation process of the spent FBR fuel reprocessing, etc. Separation tests were performed using Mixer-settlers. 1 M (mol dm
) nitric acid solution containing Nd, Sr, Zr, Pd, H
O and EDTA was used as the feed, and 0.1 M tetradodecyl diglycolamide / docecane was used as the extraction solvent. Only Nd was used to represent the trivalent cations such as Am, Cm and rare earthes. As the results, Nd was extracted from the feed and Sr was separated from Nd, highly effectively. Almost all of Zr and Pd were not extracted and transferred to raffinate, 3 % of Zr and 0.4 % of Pd, however, were transferred to the Nd product.