二氧化氮/氧气体系下选择性硝化制备4-硝基间二甲苯  

Preparation of 4-Nitro-m-xylene Using Nitrogen Dioxide/Molecular Oxygen

作　　者：吉呈 付潇[1] 董雄辎[1] 邰艳芳[1] 

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《化学试剂》2016年第1期80-82,共3页Chemical Reagents

摘　　要：间二甲苯的传统硝化方法有许多缺陷,为探索绿色硝化方法,对二氧化氮用量、不同类型的催化剂、催化剂用量和反应温度等因素进行了研究。当间二甲苯与二氧化氮物质的量比例为1∶3,β-280催化剂用量为0.32 g,25℃时反应,标题化合物的异构体选择性比例可以提高到91.6%,产率达96.0%,标题化合物与2-硝基间二甲苯的组成比达到了10.9∶1。The traditional method of nitration reaction has several disadvantages. The effects of amount of nitrogen dioxide and catalyst,various type of catalysts and reaction temperature on yield and isomer ratio of 4-nitro-m-xylene to 2-nitro-m-xylene were investigated when m-xylene reacted with nitrogen dioxide / molecular oxygen over zeolite HBEA of Si / Al = 280 at mid conditions to yield mono nitro-m-xylenes as the main products,where the 4-nitro-m-xylene isomer predominated up to 91. 6% and the nitro-mxylenes yield was improved to 96. 0%. The 4-nitro-m-xylene to 2-nitro-m-xylene ratio could reach 10. 9.

关 键 词：间二甲苯 硝化 二氧化氮 区域选择性 

分 类 号：O625.11[理学—有机化学]