Method for continuously preparing 2-nitro-4-methylsulfonyl toluene

The invention relates to the field of chemical production, and discloses a method for continuously preparing 2-nitro-4-methylsulfonyl toluene. The method comprises the following steps: feeding raw materials into a pre-cooling area, and then feeding the raw materials into a micro-channel reaction are...

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Bibliographische Detailangaben
Hauptverfasser: GUO XIAOWEI, WANG TAO, WU KUN, WANG HAILIANG, NI XIAOYUAN
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention relates to the field of chemical production, and discloses a method for continuously preparing 2-nitro-4-methylsulfonyl toluene. The method comprises the following steps: feeding raw materials into a pre-cooling area, and then feeding the raw materials into a micro-channel reaction area for contact, the micro-channel reaction zone comprises a low-temperature module, a medium-temperature module, a high-temperature module and a quenching module which are connected in sequence, and the low-temperature module, the medium-temperature module, the high-temperature module and the quenching module respectively consist of at least one set of static tubular reactors; the raw material B is mixed acid of concentrated sulfuric acid and concentrated nitric acid. According to the method provided by the invention, the reaction time is greatly shortened, the production efficiency is improved, the content of the dinitro product is reduced, the product quality is improved, and the potential safety hazard is reduced