Study on mechanism for oxidation of N,N-dimethylhydroxylamine by nitrous acid

被引：5
|
作者：
Li Gaoliang [1 ]
He Hui [1 ]
机构：
[1] China Inst Atom Energy, Beijing 102413, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2011年 / 287卷 / 03期
关键词：
Kinetics; N; N-dimethylhydroxylamine; Nitrous acid; Mechanism; HYDROXYLAMINE DERIVATIVES; PUREX PROCESS; KINETICS;
D O I：
10.1007/s10967-010-0912-y
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The oxidation of N,N-dimethylhydroxylamine (DMHAN) by nitrous acid is investigated in perchloric acid and nitric acid medium, respectively. The effects of H+, DMHAN, ionic strength and temperature on the reaction are studied. The rate equation in perchloric acid medium has been determined to be -d[HNO2]/dt = k[DMHAN][HNO2], where k = 12.8 +/- A 1.0 (mol/L)(-1) min(-1) when the temperature is 18.5 A degrees C and the ionic strength is 0.73 mol/L with an activation energy about 41.5 kJ mol(-1). The reaction becomes complicated when it is performed in nitric acid medium. When the molarity of HNO3 is higher than 1.0 mol/L, nitrous acid will be produced via the reaction between nitric acid and DMHAN. The reaction products are analyzed and the reaction mechanism is discussed in this paper.
引用
收藏
页码：673 / 678
页数：6
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