负载型磷钨酸催化苯气相硝化  

Study on the Vapor Phase Nitration of Benzene over Supported Phospho-Tungstic Acid Catalysts

作　　者：陈景林 林青松[1] 吕连海[1] 蔡天锡[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012

出　　处：《石油化工》2001年第1期17-19,共3页Petrochemical Technology

基　　金：辽宁省回国博士启动资金资助项目

摘　　要：研究了负载型磷钨酸对苯气相硝化反应的催化活性 ,探讨了载体、反应温度、杂多酸负载量、苯 硝酸摩尔比对硝化率的影响。试验表明 ,H3PW1 2 O40 SiO2 催化剂对苯气相硝化反应具有很好的催化活性 ,在苯 硝酸摩尔比为 2、反应温度 15 5～ 16 0℃时 ,硝基苯产率可达 90 6 %Catalytic activities of supported phospho-tungstic acid catalysts in the vapor phase nitration of benzene were studied The effects on nitration of supports,reaction temperatures,loading amount of hetero-polyacid and molar ratio of benzene to HNO 3 were also investigated The results show that H 3PW 12 O 40 /SiO 2 is an excellent catalyst for the vapor phase nitration of benzene, and the optimum reaction conditions are: molar ratio of benzene to HNO 3,2∶1 and reaction temperature, 155～160 ℃ Under above conditions, the yield of nitrobenzene based on HNO 3 is 90 6% [

关 键 词：气相硝化 负载型磷钨酸 硝基苯 苯 催化 

分 类 号：TQ246.12[化学工程—有机化工]