单甲基肼与亚硝酰钌硝酸根配合物的反应动力学

Reaction Between Monomethylhydrazine and Nitrosylruthenium Nitrato Complexes

摘要: 研究了单甲基肼（MMH）浓度、酸度、温度及预处理时间等对钌预处理效果的影响。采用溶剂萃取法研究了RuNO硝酸根配合物与MMH的反应动力学，75℃下该反应的表观速率方程为：r=Kc^6.38(RuNO(Ⅲ))•c^2.60(MMH)c^-0.88(HNO₃)。反应速度随着MMH浓度增加而加快，随着HNO₃浓度增加下降。75℃下，料液经MMH预处理2h，Ru的分配比显著降低，预处理效果明显。

Abstract: The influence of monomethylhydrazine(MMH) concentration, acidity, temperature and heat preservation time on decontamination of ruthenium(Ru) have been studied in the paper. By solvent extraction method, a reaction rate equation of the system studied is obtained as follows:r=Kc^6.38(RuNO(Ⅲ))•c^2.60(MMH)c^-0.88(HNO₃). The reaction rate increases with the increase of MMH concentration, while decreases with the increase of nitric acid concentration. The Ru distribution coefficient decreases obviously by 2 h pretreatment with the system of 0.1mol/L MMH and 0.2mol/L HNO₃ at 75℃. By this way, the extractable Ru content decreases, and the effect of pretreatment is obvious.