Many methods can be used to increase p-MNT yield in mononitration product of toluene in lab.It is found that the composition of mixed acid and of nitration method have considerable effect on isomer distribution of the product. With concentrated H2SO4 as substrate, toluene can be nitrated by adding diluted HNO3 at certain temperature, and the p-MNT in the product increased by 8%,which is promising to be used in industry.
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蔡春,吕春绪.提高对硝基甲苯生成比例的工业硝化方法探讨[J].含能材料, 1997, 5(4):171-174. Cai Chun, Lü Chun-xu. INVESTIGATION ON THE NITRATION METHOD FOR INCREASING THE YIELD OF p-MNT[J]. Chinese Journal of Energetic Materials, 1997, 5(4):171-174.