Title:
PRODUCTION METHOD FOR NITROBENZENE
Document Type and Number:
WIPO Patent Application WO/2024/001054
Kind Code:
A1
Abstract:
The present application belongs to the field of production of nitrobenzene, and particularly relates to a production method for nitrobenzene. The method comprises the following steps: mixing benzene and an acid, sending the resulting mixture to a microreactor, and performing a nitration reaction; then sending same to a centrifuge for centrifugation, passing an obtained organic phase through a second centrifuge, a third centrifuge and a fourth centrifuge in sequence for pre-washing, alkali washing and final washing, and finally discharging the nitrobenzene, which is obtained by means of the centrifuge and washing, out of the centrifuge from an organic phase discharging port of the fourth centrifuge. The present invention provides a novel process for continuously producing nitrobenzene, wherein a microreactor is used for nitration and dilution, and centrifuges are used for washing and separation. When the microreactor is used for nitration, mass transfer and heat transfer effects during the reaction process are good, and the separation efficiency of a centrifugal device is high. The method has the advantages of intrinsic safety, a high product selectivity, a high production efficiency, etc.
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Inventors:
MA HAIBING (CN)
LIANG YULONG (CN)
LIANG YULONG (CN)
Application Number:
PCT/CN2022/137440
Publication Date:
January 04, 2024
Filing Date:
December 08, 2022
Export Citation:
Assignee:
NINGXIA SYNGOHO NEW MATERIALS TECH CO LTD (CN)
International Classes:
C07C205/06; C07C201/08; C07C201/16
Foreign References:
| CN115057781A | 2022-09-16 | |||
| US3092671A | 1963-06-04 | |||
| CN103044261A | 2013-04-17 | |||
| CN113248385A | 2021-08-13 | |||
| CN102675118A | 2012-09-19 |
Other References:
WEI WEI, XU WEI-CHANG; YAN DONG-MAO; LI GU-GANG; ZHOU CHUAN: "Nitrification of Benzene in Micro-reactor", RANLIAO YU RANSE - DYESTUFFS AND COLORATION, SHENYANG HUAGONG YANJIUYUAN, CN, vol. 58, no. 1, 28 February 2021 (2021-02-28), CN , pages 52 - 56, XP093124719, ISSN: 1672-1179
CEN YONG, LI ZHENGQI: "Application of centrifugal extractors in production of nitrobenzene", CHLOR-ALKALI INDUSTRY, vol. 46, no. 4, 30 April 2010 (2010-04-30), pages 29 - 30, XP093124720, ISSN: 1008-133X
CEN YONG, LI ZHENGQI: "Application of centrifugal extractors in production of nitrobenzene", CHLOR-ALKALI INDUSTRY, vol. 46, no. 4, 30 April 2010 (2010-04-30), pages 29 - 30, XP093124720, ISSN: 1008-133X
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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