摘要
用HNIL.NO3-和HNIL.HSO4-新型酸性离子液体为Lewis酸催化剂,考察了催化剂种类、用量、硝化反应时间、温度、醋酐等因素对甲苯选择性硝化反应的影响,并研究了催化剂的循环使用效果。结果表明,醋酐存在条件下,以CCl4为溶剂、95%发烟硝酸为硝化剂,温度控制在55℃,反应60 min,3.0 g HNIL.HSO4-新型酸性离子液体催化剂对甲苯硝化表现出较强的区域选择性,产物收率达到99.4%,硝化产物邻位和对位异构体的重量比达1.12,较硝硫混酸的1.67显著降低。该催化剂可循环使用5次,催化活性变化很小。
Two new acidic ionic liquids catalysts-HNIL·NO3^- and HNIL·HSO4^-were employed as Lewis acid catalysts for nitration of toluene.The effects of kind of catalyst,dosage of catalyst,nitrated reaction time and temperature,acetic anhydride and recovered catalyst,etc.on the selectivity of nitration of toluene were investigated.With 95% nitric acid as nitrating reagent and CCl4 as solvent at the presence of acetic anhydride.The results show high selectivity when the temperature is controlled at 55 ℃,and the nitrated reaction time is 60 min.The o/p（ratio of ortho to paro isomer of toluene nitration） ratio is 1.12 in product distribution of toluene nitration.It is lower than1.67 using sulfonitric acid as catalyst.The yield of products is 99.4%.The catalyst can be reutilized up to five times with little decrease in activity.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2009年第6期717-721,共5页
Chinese Journal of Energetic Materials
基金
国家重点基础研究发展计划973课题(61374)资助项目
关键词
应用化学
新型酸性离子液体
催化
甲苯
选择性硝化
applied chemistry
new acidic ionic liquid
catalyst
toluene
selective nitration
