KOH/AC催化合成对硝基苯甲醚的研究  

Catalytic Synthesis of p-Nitroanisole over KOH/AC

作　　者：蔡明明[1] 薛冰[1] 李永昕[1] 

机构地区：[1]江苏工业学院化学化工学院,江苏常州213164

出　　处：《江苏工业学院学报》2010年第1期9-12,共4页Journal of Jiangsu Polytechnic University

基　　金：江苏省高技术研究项目(BG2006015);江苏省高校重大基础研究项目(06KJA5013)

摘　　要：考察了以碳酸二甲酯与对硝基苯酚在固体碱催化剂上液相合成对硝基苯甲醚的过程。研究结果表明:以活性炭(AC)为载体,以KOH为活性组分,当活性组分负载量达到20%(质量分数)时催化剂具有最高的活性和选择性。采用CO2-TPD对KOH/AC的性质进行了表征,结果表明KOH/AC催化剂的碱强度随KOH负载量的增加而增加,当KOH负载量超过20%时催化剂的碱强度开始降低。考察了反应温度,反应时间,原料配比,催化剂用量等因素对对硝基苯酚转化率和对硝基苯甲醚选择性的影响。在最佳反应条件下:反应温度393 K、反应时间2 h、n(DMC)∶n(p-nitrophenol)=10∶1,对硝基苯酚转化率和对硝基苯甲醚选择性都可以达到99%以上。O-alkylation of p-nitrophenol with dimethyl carbonate（DMC） in liquid phase was conducted to synthesize p-nitroanisole over solid base catalysts.The results showed that the KOH/Active carbon（AC） with KOH loading amount of 20 wt% exhibited the highest activity and selectivity.The base properties for KOH/AC were characterized by CO2-TPD.The base strength of KOH/AC increased with increase in KOH loading.A decrease in base strength of the catalyst was detected when KOH loading amount was over 20 wt%.The effects of reaction temperature,reaction time and molar ratio of DMC to p-nitrophenol on catalyst activity were investigated.Under the optimum reaction conditions,i.e., reaction temperature 393K,reaction time 2h and n（DMC）∶n（p-nitrophenol）=10∶1,both p-nitrophenol conversion and selectivity for p-nitroanisole were up to 99%.

关 键 词：对硝基苯酚 对硝基苯甲醚 碳酸二甲酯 固体碱 

分 类 号：TQ243.2[化学工程—有机化工]