H_2SO_4/MCM-41上苯的气相硝化反应  

Vapor-Phase Nitration of Benzene to Nitrobenzene on H_2SO_4/MCM-41

作　　者：刘洪峰[1] 周硼[1] 吕连海[1] 蒋山[1] 王安杰[1] 林青松[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》2003年第2期108-111,共4页Petrochemical Technology

基　　金：辽宁省博士生启动资金。

摘　　要：研究了在H2SO4/MCM-41上,以稀硝酸(60%～70%)作硝化剂苯的气相硝化反应。实验结果表明,在苯与硝酸摩尔比为2 5、MCM-41上硫酸负载量(质量分数)为20%、反应温度150～160℃、空速3279h-1条件下,硝基苯产率大于99%。维持其它实验条件不变,提高空速到5700h-1时,硝基苯产率达到91 2%;连续反应240h,催化剂活性没有明显下降。Vapor-phase nitration of benzene over solid acid catalyst MCM-41 loaded with 20% (mass fraction) H 2SO 4 using diluted nitric acid (60%～70%) as nitrating agent was investigated.Supported sulfuric acid catalyst exhibited a very high activity.At a reaction temperature of 150～160 ℃ and a space velocity (SV) of 3279 h -1 ,the yield of nitrobenzene(NB) based on HNO 3 was higher than 99%.High nitration activity of H 2SO 4/MCM-41 lasted for ten days.

关 键 词：H2SO4/MCM-41 苯 气相硝化反应 稀硝酸 硝基苯 负载型硫酸催化剂 

分 类 号：TQ246.12[化学工程—有机化工]