Study on synthesis of <i>m</i>-dinitrobenzene based on continuous flow reaction

LI Bo; ZHU Xiaolei; SUN Cong; GU Wei; HAN Lulu; DI Meng; MAO Yongjun; WANG Han

Volume 35 Issue 2

Jun. 2021

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Article Navigation > Journal of Shanghai University of Engineering Science > 2021 > 35(2): 123-128

LI Bo, ZHU Xiaolei, SUN Cong, GU Wei, HAN Lulu, DI Meng, MAO Yongjun, WANG Han. Study on synthesis of m-dinitrobenzene based on continuous flow reaction[J]. Journal of Shanghai University of Engineering Science, 2021, 35(2): 123-128.

Citation:

LI Bo, ZHU Xiaolei, SUN Cong, GU Wei, HAN Lulu, DI Meng, MAO Yongjun, WANG Han. Study on synthesis of m-dinitrobenzene based on continuous flow reaction[J]. Journal of Shanghai University of Engineering Science, 2021, 35(2): 123-128.

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Study on synthesis of m-dinitrobenzene based on continuous flow reaction

School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Received Date: 2021-03-06
Publish Date: 2021-06-30

Abstract

Abstract

The process of nitrobenzene nitration was explored by using microchannel reactor. By adjusting concentration of sulfuric acid, molar ratio of nitric acid to sulfuric acid, molar ratio of nitric acid to nitrobenzene, reaction temperature and residence time, the optimal reaction conditions were obtained as follows: the concentration of sulfuric acid was 92%, molar ratio of nitric acid to sulfuric acid was 1∶5.3, molar ratio of nitrobenzene to nitric acid was 1∶1.15, reaction temperature was 85 ℃, and residence time was 70 s. The experimental result shows that average conversion of nitrobenzene is 99.2%, average yield of m-dinitrobenzene is 85.5%, average yield of p-dinitrobenzene is 3.5%, and average yield of o-dinitrobenzene is 10.2%. When nitrobenzene is nitrated in micro reactor, the waste acid can be recycled by adding concentrated sulfuric acid and fuming nitric acid, which will make it more green, safe and environmentally friendly.
- microchannel reactor,
- nitrobenzene,
- nitrification

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References(10)

References

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