由邻硝基甲苯生产三硝基甲苯过程模拟

引　言目前 ,国内外生产三硝基甲苯大都采用甲苯三段硝化工艺 .混合硝基甲苯生产线是由甲苯硝化成一硝基甲苯 ,然后再将一硝基甲苯根据其异构体性质的不同分离成对位 (36 .1% )、邻位 (5 9.2 % )、间位硝基甲苯 (4.7% ) 1] 3种产品 .市场上对硝基甲苯的需求量远远大于邻、间硝基甲苯 ,在生产中占较大比例的邻硝基甲苯不能得到充分利用 ,如用其代替甲苯生产三硝基甲苯 ,可将三段硝化工艺减为二段 ,且邻硝基甲苯得到合理利用 .本文根据硝化与氧化反应动力学理论2 ] 建立了用邻硝基甲苯生产三硝基甲苯的末段硝化过程的稳态模型 ,根据生产数据…

PROCESS SIMULATION IN PRODUCING TRINITROTOLUENE WITH o -NITROTOLUENE

Based on the kinetics of nitration and oxidation of dinitrotoluene,the steady-state mathematical model is developed for producing trinitrotoluene with o -nitrotoluene in the last-stage nitration process.The industrial process was simulated by using Monte Carlo and Quasi-Newton methods.The kinetic parameters are estimated according to the industrial process data.The results show that trinitrotoluene can be produced with o -nitrotoluene instead of toluene and a higher productivity can be obtained by using the same equipment.The simulation can provide theoretical guidance for innovation of industrial process.