A Study on the Scale-up Test for the Nitration Process using NO2-O3

이산화질소-오존을 이용한 니트로화 반응의 Scale-up 연구

  • Cho, Jin-Ku (Division of Chemical Engineering, Seoul National University) ;
  • Kim, Young-Tae (Division of Chemical Engineering, Seoul National University) ;
  • Sung, Si-Young (Department of Chemistry, Inha University) ;
  • Chung, Kyoo-Hyun (Department of Chemistry, Inha University) ;
  • Lee, Bon-Su (Department of Chemistry, Inha University) ;
  • Kim, Young Gyu (Division of Chemical Engineering, Seoul National University) ;
  • Lee, Yoon-Sik (Division of Chemical Engineering, Seoul National University)
  • 조진구 (서울대학교 공과대학 응용화학부) ;
  • 김영태 (서울대학교 공과대학 응용화학부) ;
  • 성시영 (인하대학교 이과대학 화학과) ;
  • 정규현 (인하대학교 이과대학 화학과) ;
  • 이본수 (인하대학교 이과대학 화학과) ;
  • 김영규 (서울대학교 공과대학 응용화학부) ;
  • 이윤식 (서울대학교 공과대학 응용화학부)
  • Received : 1999.04.07
  • Accepted : 1999.09.21
  • Published : 1999.11.10

Abstract

The well-known mixed-acid process for the aromatic nitration requires subsequent separation of spent acid, mainly dilute sulfuric acid. A novel nitration process using $HNO_3-NO_2-O_3$ was tested in a small pilot scale with 3 mol of p-nitrotoluene. Nitrogen dioxide(14.3 mol) was added three times in parts into the solution of p-nitrotoluene and $HNO_3$(6 mol) in dichloroethane. The nitration proceeded to more than 97% conversion within 5.5 h using 0.871 mol/h of ozone. As a clean process of aromatic nitration, this method is expected to replace the present process which causes the environmental problems.

Acknowledgement

Supported by : 인하대학교

References

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