Thermal Hazard Analysis of Dinitrotoluene Nitration
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Differential Scanning Calorimeter(DSC),Accelerating Rate Calorimeter(ARC) and Reaction Calorimeter (RC) were used to study thermal hazard of dinitrotoluene(DNT) nitration. DSC results show onset temperature T0 of trinitrotoluene(TNT) is 298.38 ℃, which is lower than that of DNT. ARC results demonstrate that TNT starts to decompose at 232 ℃, and TD24 of TNT decomposition is about 224 ℃. Based on RC test results, there is a large amount of heat release during DNT nitration, and the heat generation at 110 ℃ is 1.4 times heat generation at 90 ℃, in which a large part comes from the exothermal side reaction actually. Therefore, temperature should be controlled strictly to avoid acutely exothermal side reaction and product decomposition.
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陈利平,陈网桦,彭金华,等.二硝基甲苯硝化反应的热危险性分析[J].含能材料,2010,18(6):706-710. CHEN Li-ping, CHEN Wang-hua, PENG Jin-hua, et al. Thermal Hazard Analysis of Dinitrotoluene Nitration[J]. Chinese Journal of Energetic Materials,2010,18(6):706-710.