TNT清洁生产过程分析

为减少TNT生产过程中副产物和污染物的产生与排放,对TNT的清洁生产工艺进行了理论和实验研究.结果表明,TNT粗品中的不对称TNT主要来自甲苯硝化过程产生的间硝基甲苯;在二段硝化过程中对一硝基甲苯进行分离后,使用邻硝基甲苯或对硝基甲苯作原料生产TNT,可以大大降低产品中的不对称TNT含量,实现清洁生产;使用清洁生产工艺后废水的总化学耗氧量减少88.8%,减轻了红水处理的负荷.

Analysis of Clean Production Process of TNT

To reduce the by-products in the TNT production process, and decrease the production and discharge of pollutants, the theoretic and experimental study about the clean production technology of TNT was done. The results show that the unsymmetrical TNT in the crude TNT comes mainly from the m-nitrotoluene in the nitration process of toluene, seperating the mono-nitrotoluene can get m-nitrotoluene, o-nitrotoluene and p-nitrotoluene. Using one of the o-nitrotoluene and/or p-nitrotoluene as the raw material of TNT can increase the economical profit and decrease the by-products, realizing the clean production of TNT. The clean production process with new purifying agent and new purification process can reduce the total chemical oxygen demand by 88.8%, and decrease the treatment duty of the red water.