Cr-Cu硅胶催化间硝基甲苯气相制备间甲苯胺  

Gas Phase Catalytic Hydrogenation of m-Nitrotoluene to m-Toluidine Using Cr-Cu/SiO_2 Catalyst

作　　者：钱华[1] 刘大斌[1] 叶志文[1] 吕春绪[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《精细化工》2009年第7期720-723,共4页Fine Chemicals

摘　　要：用固定床反应器作为气相加氢装置,将自制Cu硅胶催化剂用于间硝基甲苯催化加氢制备间甲苯胺的反应。通过考察Cu含量以及助剂N i、Co、Cr、Mn对催化剂性能的影响,筛选出催化性能最佳的Cr-Cu硅胶催化剂。分析了各反应因素对间甲苯胺产率的影响:当反应时间1.5 h,反应温度270℃,氢气与间硝基甲苯摩尔比为9∶1时,间甲苯胺的产率达到最大值99.4%,此时Cr-Cu硅胶催化剂的最大负荷为1.1 mL/(h.mL-cat.),满足工业化应用水平。目前该工艺的中试生产线正在805厂调试中。The fixed-bed reactor was used as the device where m-toluidine was prepared from m- nitrotoluene by gas phase catalytic hydrogenation using home-made Cu-SiO2 catalyst. The effects of different contents of copper and supports, such as Ni, Co and Cr in Cu/SiO2 catalyst were studied. The optimum catalyst system was composed of Cu and Cr. Meanwhile, effects of the reaction parameters on the yield are studied. Results showed： the home-made Cu-SiO2 catalyst was effective. Under the conditions of reaction time 1.5 h, reaction temperature 270℃, n （ H2 ） ： n （m-nitrotoluene） = 9：1, the yield of m-toluidine reached 99.4%. Meanwhile, LHSV is 1.1 mL/（ h.mL-cat. ）, which meets the requirement of industrialization. The production line on pilot scale of this technology is being tested in the 805 factory.

关 键 词：间硝基甲苯 间甲苯胺 气相加氢 固定床 精细化工中间体 

分 类 号：TQ032[化学工程] TQ246.1