煤焦油洗油中苊的分离提纯研究  

Separation and purification of acenaphthylene from wash oil of coal tar

作　　者：张振华[1] 王瑞[1] 赵欣[1] 石辉文[1] 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000

出　　处：《洁净煤技术》2012年第3期71-73,77,共4页Clean Coal Technology

摘　　要：在通过精馏和重结晶从洗油中提取苊的研究基础上,提出了分离精制苊的精馏—共沸精馏—重结晶工艺。结果表明:在改进后的工艺路线中,通过共沸精馏对精馏收集到的苊馏分进一步富集,克服了因精馏获得苊馏分中苊含量低而多次重结晶造成苊回收率偏低的问题,提高了苊的回收率,且得到的苊纯度高达99.6%。To overcome shortcomings of distillation and recrystallization in extracting acenaphthene from wash oil, provide the process of rectification-azeotropie distillation-reerystallization. The results show that, the added process can further refine the acenaphthylene, which is pretreated in rectification stage. The improved process doesn＇t need many times of recrystallization, so reduce the loss of acenaphthene. The purity of acenaphthene reaches up to 99.6 percent.

关 键 词：洗油 苊 共沸精馏 回收率 共沸剂 煤焦油 

分 类 号：TQ523.5[化学工程—煤化学工程]