Studies on the reaction kinetics between nitrous acidand N，N-Dimethylhydroxylamine

doi:10.3724/SP.J.1095.2010.90543

Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (08): 916-923.DOI: 10.3724/SP.J.1095.2010.90543

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Studies on the reaction kinetics between nitrous acidand N，N-Dimethylhydroxylamine

LI Gao-Liang, HE Hui*

(Radiochemistry Department of China Institute of Atomic Energy,Beijing 102413)

Received:2009-08-20 Revised:2010-01-12 Published:2010-08-10 Online:2010-08-10

Abstract

Abstract:

The oxidation of N,N-dimethylhydroxylamine(DMHAN) by nitrous acid in a perchloric acid and nitric acid medium as well as the effects of c(H⁺), c(DMHAN), ion strength and temperature on the reaction were studied. The rate equation in perchloric acid was determined as follows:-d[HNO₂]/dt=k[DMHAN][HNO₂], where k=(12.8±1.0) mol/(L·min) when the temperature is 18.5 ℃ and the ion strength is 0.73 mol/L with an activation energy about of 41.5 kJ/mol. The reaction became complicated when it was performed in nitric acid medium. The reaction between nitric acid and DMHAN occurred and nitrous acid was produced when the concentration of nitric acid was higher than 1.0 mol/L. The reaction products were analyzed and the reaction mechanism was discussed.

Key words: N,N-dimethylhydroxylamine, reaction kinetics, reaction mechanism, nitrous acid

CLC Number:

O615

LI Gao-Liang, HE Hui*. Studies on the reaction kinetics between nitrous acidand N，N-Dimethylhydroxylamine[J]. Chinese Journal of Applied Chemistry, 2010, 27(08): 916-923.

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Studies on the reaction kinetics between nitrous acidand N，N-Dimethylhydroxylamine

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