摘要
工业甲基萘中含有大量的氮化物杂质,如喹啉、异喹啉、吲哚等,可以通过甲酸络合萃取法脱除。考察了萃取时间、萃取温度、甲酸体积分数和剂油体积比等因素对萃取效果的影响。结果表明,对于喹啉、异喹啉和甲基喹啉,体系在3 min内即达到萃取平衡;但对吲哚脱除,则需要更长的时间。甲酸的体积分数对喹啉、异喹啉和甲基喹啉的萃取效果几乎没有影响,但对吲哚的脱除有直接影响。甲酸体积分数越高,对吲哚萃取效果越好。40℃以下吲哚的萃取效果较好。萃取过程甲基萘收率在95%以上,该工艺为工业甲基萘脱氮找到了一个有效的办法。
The crude methylnaphthalene oil （CMNO） contains some nitrogen impurities, such as quinoline, isoquinoline and indole and so on. The nitrogen compounds can be removed off efficiently from CMNO by extraction with formic acid. Experiment was carried out to investigate the effect of the extraction time, temperature, formic acid concentration, volume ratio of solvent to oil on extraction. The result shows that extraction system reaches equilibrium within 3 min for quinoline, isoquinoline and methylquinoline, but needs longer time for indole, the formic acid concentration has little effect on removal of quinoline, isoquinoline and methylquinoline but has strong effect on removal of indole, the higher the formic acid concentration, the higher the indole removal efficiency, the removal efficiency for indole is higher below 40℃. The yield for methylnaphthalene is more than 95 %, which presents an effective method for removal of nitrogen compounds from CMNO.
出处
《石油化工高等学校学报》
EI
CAS
2007年第1期18-20,共3页
Journal of Petrochemical Universities
基金
北京市属
市管高校人才强教计划资助项目(BJJWR20051102)
关键词
工业甲基萘
氮化物
络合萃取
甲酸
Crude Methylnaphthalene oil
Nitrogen Compounds
Extraction
Formic Acid
