四氟硼酸1-甲基-3-丁基咪唑盐的合成、表征及萃取脱硫探索  

PREPARATION,CHARACTERIZATION AND EXTRACTIVE DESULFURIZATION PERFORMANCE OF 1-METHYL-3-BUTYL IMIDAZOLIUM TETRAFLUOROBORATE

作　　者：陈阳[1,2] 朱涵庆 李娟娟[1] 王光辉[1,2] 

机构地区：[1]武汉科技大学化学工程与技术学院,武汉430081 [2]湖北省煤转化与新型炭材料重点实验室

出　　处：《石油炼制与化工》2015年第1期20-24,共5页Petroleum Processing and Petrochemicals

基　　金：高等学校博士学科点专项科研基金项目(20114219120002);国家级大学生创新创业训练计划项目(201210488007);煤转化与新型炭材料湖北省重点实验2013年度开放基金项目(WKDM201308)

摘　　要：制备了环保型绿色离子液体——四氟硼酸1-甲基-3-丁基咪唑盐([BMIM]BF4),主要探讨"绿色合成"方法及其对模型油萃取脱硫的效果。在无溶剂条件下将N-甲基咪唑与1-氯代正丁烷通过高产率的亲核取代反应生成中间产物[BMIM]Cl,再使其与NaBF4进行复分解反应生成目标物质,经红外光谱(FT-IR)、紫外光谱(UV)等测试方法验证可知,产物的分子结构为[BMIM]BF4。考察了萃取时间、温度、含硫化合物种类(苯并噻吩BT或二苯并噻吩DBT)及剂油体积比对脱硫率的影响,在萃取温度40℃、萃取时间30min、剂油体积比1∶2的条件下,含DBT模型油的单级萃取脱硫率为54.4%。对含DBT模型油进行了三级萃取及离子液体回收再利用研究,结果表明,三级萃取脱硫率达到90%,离子液体可回收利用。An environment friendly ionic liquid （IL）1-methyl-3-butyl imidazoliumtetrafluroborate （[BMIM]BF4 ）was synthesized by green synthesis method. The investigations of preparation method and the extractive desulfurization performance were conducted. The intermediate product[BMIM]Cl was obtained firstly by nucleophilic substitution reaction of N-methyl imidazolium and 1-chlorobutane under solvent-free condition,and then the product reacts with NaBF4 to get the target product （[BMIM]BF4 ）. The molecular structure was confirmed by characterization of UV、FT-IR、MS and 13 C-NMR. The effect of extraction time,extraction temperature,sulfur compound type （BT or DBT）,ratio of IL to model oil on extractive desulfurization was presented. The multistage extraction of DBT model oil with IL [BMIM]BF4 and its regeneration were studied. The results indicate that at the conditions of extraction tem-perature 40 ℃,30 min,and IL to oil volume ratio 1∶2,the extraction desulfurization rate is 54.4% in single stage. While by 3 stage extractions,the sulfur removal rate is up to 90% and the IL can be recycled.

关 键 词：咪唑盐 萃取脱硫 模型油 离子液体 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]