3,5-二甲基苯酚气相胺化合成3,5-二甲基苯胺的工艺研究  

Study on the Synthesis of 3,5-Dimethylaniline with 3,5-Dimethylphenol by Gas Phase Amination

作　　者：张秀成[1] 陈立宇[1] 孙荣华[1] 潘海卫[1] 

机构地区：[1]西北大学化工系,陕西西安710069

出　　处：《化学反应工程与工艺》2003年第2期145-149,共5页Chemical Reaction Engineering and Technology

基　　金：陕西省教育厅重点科研项目(编号:JZK08)

摘　　要：　以γ-Al2O3为载体、用浸渍法制作了钯系催化剂,在固定床反应器中研究了该工艺。考察了催化剂载体结构、钯含量、反应温度、反应接触时间及进料配比对反应的影响。结果表明:载体的孔结构对胺的选择性有较大的影响;在反应温度255℃、接触时间W/F=80g·h·mol-1时,酚的转化率约为90%,3,5-二甲基苯胺的收率在75%以上。Catalysts with 0.5%(mass) Pd used in experiments were prepared by impregnation methods with 3mm γAl2O3 as supports. The synthesis of 3,5dimethylaniline with 3,5dimethylphenol by gas phase amination were investigated in a continuous fixed bed reactor. The effects of the pore structure of supports and various operation conditions were examined. The experimental results showed that effect of the pore structure of supports on the selectivity of the reaction product is more sensible. Under favorable conditions the reactant conversion and the product yield could be up to 90% and 75%, respectively. 

关 键 词：3 5-二甲基苯酚 气相胺化 合成 3 5-二甲基苯胺 钯系催化剂 固定床反应器 颜料 中间体 染料 工艺 

分 类 号：TQ612[化学工程—精细化工] TQ620.4