催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (11): 931-933.

• 研究快讯 •    下一篇

基于烧结微纤多孔结构材料的微反应器中的苯硝化反应

李剑锋,杨九龙,王苗苗,路勇,何鸣元   

  1. 华东师范大学化学系, 上海市绿色化学与化工过程绿色化重点实验室, 上海 200062
  • 收稿日期:2007-11-25 出版日期:2007-11-25 发布日期:2011-10-13

A Microreactor Based on Sinter-Locked Microfibrous Media with Open Porous Structure for Nitration of Benzene

LI Jianfeng, YANG Jiulong, WANG Miaomiao, LU Yong*, HE Mingyuan   

  1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, China
  • Received:2007-11-25 Online:2007-11-25 Published:2011-10-13

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摘要： 基于烧结微纤结构材料发展了一种集微混合、反应和换热于一体的微反应器,以苯硝化为模型反应考察了该微反应器用于快速、强放热的液-液两相混合反应的效果. 烧结微纤材料具有大的空隙率、三维开放孔结构和大的面积与体积比,有利于传质和传热,同时微纤三维网络具有微搅拌器的作用,有利于流体的微米尺度分割和快速混合. 因此,苯硝化反应得以在很短的时间内高选择性地进行完全. 在一定的操作条件下,苯转化率可以达到91.7%, 硝基苯选择性高达99.4%.

关键词: 微纤, 微反应器, 苯, 硝化

Abstract: A microreactor with an integrated heat-exchanger has been developed for strongly exothermic liquid-liquid reactions on the basis of novel metallic microfibrous structure. The microreactor was made from simply inserting quadrate pieces of the microfibrous media in the reaction and heat-exchange chambers. This microreactor was examined in the use with the nitration of benzene. This new approach facilitates mass and heat transfer by taking the beneficial properties in terms of large void volume, three-dimensional micron-grade pore structure, and large surface area to volume ratio. Note that three-dimensional network structure acts as a micromixer thereby leading to micronic segmentation and fast mixing of fluids. The results showed that nitration of benzene could proceed completely in this novel microreactor with high selectivity at a short residence time. The selectivity of 99.4% to nitrobenzene was achieved with a benzene conversion of 91.7% at a residence time of30 sand 60 ℃.

Key words: microfiber, microreactor, benzene, nitration