三氧化硫脲的稳定性  

Study on Stability of Aminoiminomethanesulfonic Acid

作　　者：潘志信[1] 

机构地区：[1]烟台师范学院化学与材料科学学院,烟台264025

出　　处：《应用化学》2007年第3期349-352,共4页Chinese Journal of Applied Chemistry

摘　　要：研究了固体三氧化硫脲和固体一水三氧化硫脲的热稳定性。固体三氧化硫脲和水合三氧化硫脲在大气条件下均缓慢分解成SO2和脲,随温度升高分解加快。研究了温度、浓度和pH值对水溶液中的三氧化硫脲水解速率的影响。三氧化硫脲的水解速率方程可以表示为r/(mol.L-1.s-1)=k/(L0.5.mol-0.5.s-1)×c(AIMSO3H)/(mol.L-1)×(c(OH-)/(mol.L-1))0.5。水解反应活化能为73.56kJ/mol。在弱酸性条件下,三氧化硫脲对许多氧化剂稳定。The thermal stability of solid aminoiminomethanesulfonic acid （AIMSO3 H） was studied. The solid aminoiminomethanesuffonic acid and solid aminoiminomethanesuffonic acid hydrate can be decomposed into SO2 and urea under atmosphere condition. The decomposition increases with temperature. The hydrolysis rate of aminoiminomethanesuffonic acid in water solution was studied. It is influenced by temperature, concentration and pH. The hydrolysis rate equation of aminoiminomethanesuffonic acid is r/（mol·L^-1·s^-l） = k/ （L^0.5 · mol^-0.5 · s^-1） ×c（AIMSO3n）/（mol. L-） ×（c（OH^-）/（mol·L^-1）^.0.5 The activation energy of the hydrolysis reaction is 73.56 kJ/mol. Aminoiminomethanesulfonic acid is stable to some oxidants in weak acid condition.

关 键 词：三氧化硫脲 稳定性 水解 速率方程 

分 类 号：O643[理学—物理化学]