微反应器技术在芳胺类重氮化合成中的应用及安全性改进

Application and Safety Enhancements of Microreactor Technology in Aromatic Amine Diazotization Synthesis

摘要

芳胺类重氮化反应在染料、医药、农药、精细化学品合成里是重要的单元过程。不过此反应放热速度快、温升剧烈，重氮盐稳定性不佳，传统釜式生产会出现局部过热及产物分解情况，存在批次波动、安全风险。微反应器技术依靠微尺度通道、高效混合、快速换热还有低持液量等优点，能够实现反应物瞬间均匀接触、热量及时移出，极大抑制副反应发生，给芳胺重氮化过程给予了更具安全性、可控性的工程化途径。本文针对微反应器在芳胺类重氮化合成中的应用基础、工艺优势、风险控制、安全改进策略进行分析，同时也探讨了设备材质选择、通道结构优化等工程化要点，以期为提升该类反应的本质安全水平提供实用参考。

Abstract

The diazotization reaction of aromatic amines serves as a critical unit process in the synthesis of dyes, pharmaceuticals, pesticides, and fine chemicals. However, this reaction exhibits rapid exothermic release and significant temperature rise, coupled with poor stability of diazide salts. Traditional batch reactor production often suffers from localized overheating and product decomposition, leading to batch variability and safety risks. Microreactor technology leverages advantages such as micro-scale channels, efficient mixing, rapid heat transfer, and low liquid hold-up to achieve instantaneous uniform reactant contact and timely heat removal, significantly suppressing side reactions and providing a safer, more controllable engineering approach for aromatic amine diazotization. This paper analyzes the fundamental applications, process advantages, risk control strategies, and safety improvement measures of microreactors in aromatic amine diazotization synthesis, while also discussing key engineering considerations—including material selection for equipment and channel structure optimization—to enhance the intrinsic safety of such reactions.

关键词

微反应器技术 / 芳胺 / 重氮化合成 / 过程安全 / 连续流反应

Key words

microreactor technology / aromatic amine / diazotization synthesis / process safety / continuous flow reaction

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