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ANS > Publications > Journals > Nuclear Technology > Volume 122 |
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Reduction of Neptunium(VI) by Butyraldehyde Isomers in Nitric Acid Solution Volume 122 · Number 2 · May 1998 · Pages 222-227 Technical Paper · Enrichment  Gunzo Uchiyama, Shinobu Hotoku, Sachio Fujine, Mitsuru Maeda ANS Store: Purchase Article The kinetics of the reaction between Np(VI) and butyraldehyde isomers in nitric acid solution was studied to find flow-sheet conditions of the Np separation process from U and Pu. Iso-butyraldehyde was found to have a higher reduction rate than n-butyraldehyde. The former reduction rate at T = 283 to 323 K is described by the following equation: -d[Np(VI)]/dt = 6.0 × 106exp(-4.1 × 103/T) × [Np(VI)]  [iso-C3H7CHO]0[H+] (M/min).The latter reduction rate is described by the following equation: -d[Np(VI)]/dt = 4.2 × 104exp(-3.4 × 103/T) × [Np(VI)] [n-C3H7CHO]0[H+] (M/min). |
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