Hydroxylamine derivative in Purex Process. Part 4. A study on the kinetics of the oxidation-reduction reaction between N,N-diethylhydroxylamine and plutonium(IV)

The kinetics of oxidation-reduction reactions between N,N-diethylhydroxylamine (DEHAN) and plutonium(IV) in nitric acid solution have been studied by spectrophotometry at 25.2 deg C. The initial rate equation of the reaction is -d[Pu(IV)]/dt k0[Pu(IV)]2[DEHAN]1.26/[H+]2.53, where the rate constant of the reaction (k0) is (5.93 ± 0.84) x 103 (mol/l)0.27 min-1. The complete rate equation and the rate constants of the reaction are also derived. (author)