离子液体-DMSO混合溶剂精制RDX的研究  

Recrystallization of RDX in a Ionic Liquid-DMSO Co-solvent System

作　　者：任白玉[1] 王鹏[1] 李清霞[1] 孟子晖[1] 王伯周[2] 葛忠学[2] 

机构地区：[1]北京理工大学化工与环境学院,北京100081 [2]西安近代化学研究所,陕西西安710065

出　　处：《含能材料》2010年第6期639-642,共4页Chinese Journal of Energetic Materials

基　　金：爆炸科学与技术国家重点实验室资助(KFJJ-0904;YBKT-0908)

摘　　要：为了得到晶粒均一,形貌规整的RDX晶体,在70℃下,采用DMSO-[Emim]BF4,DMSO-[Bmim]Cl,DMSO-C6mimBr(质量比均为80:20)混合溶剂对RDX进行重结晶,室温冷却析晶得到精品,滤液再利用水或甲醇沉淀,将所得到的晶体用扫描电镜和差热扫描量热仪(DSC)进行分析。扫描电镜显示,利用离子液体和DMSO混合溶剂重结晶能得到粒度分布均匀,颗粒较分散,形状较圆整的RDX晶体;用DMSO-C6mimBr混合溶剂重结晶得到的晶体质量要优于DMSO-[Emim]BF4和DMSO-[Bmim]Cl混合溶剂得到的晶体。DSC分析结果表明,采用DMSO-[Emim]BF4,DMSO-[Bmim]Cl,DMSO-C6mimBr混合溶剂重结晶后能提高RDX的纯度,用DMSO-C6mimBr混合溶剂重结晶得到的晶体热安定性高于DMSO-[Emim]BF4和DMSO-[Bmim]Cl混合溶剂得到的晶体。Ionic liquid-DMSO co-solvent system（20：80 w/w） for recrystallizing RDX was investigated at 70 ℃.A non-agitated cooling crystallization method was employed for RDX growth and main collection,and rest RDX were collected by added some water or methanol to the filtrates.All the RDX samples were investigated by the DSC thermograph and SEM.The results obtained by the DSC thermograph and SEM show the thermal stability,purity,shape and quality of recrystallized RDX by Ionic liquid-DMSO co-solvent systems are improved while the H2O-precipitated or the MeOH-precipitated materials are not.The recrystallized RDX in the DMSO-C6mimBr co-solvent system are better than others.

关 键 词：有机化学 重结晶 离子液体 钝感炸药 

分 类 号：TQ564[化学工程—炸药化工]