离子液体催化邻甲酚与叔丁醇烷基化反应  

SO_3H-Functionalized Ionic Liquids for Selective Alkylation of o-Cresol With tert-Butanol

作　　者：郜蕾[1,2] 刘民[1] 聂小娃[1] 高健[1,3] 郭新闻[1] 

机构地区：[1]大连理工大学化工学院催化化学工程系精细化工国家重点实验室,辽宁大连116012 [2]中国核电工程有限公司郑州分公司,河南郑州450052 [3]郑州大学化工与能源学院,河南郑州450002

出　　处：《石油学报（石油加工）》2011年第2期256-262,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：教育部新世纪优秀人才支持计划(NCET-04-0268);"111"引智计划项目资助

摘　　要：以烷基胺、吡啶、咪唑等为原料合成了SO3H-功能化的离子液体(ILs)。采用NMR、TG-DTG对离子液体的结构及物性进行了表征,并考察其在邻甲酚(o-Cresol)和叔丁醇(TBA)烷基化反应中的催化性能。考察了反应条件对离子液体催化邻甲酚烷基化反应的影响,以及离子液体的重复使用性,比较了离子液体与常规酸催化剂在邻甲酚叔丁醇烷基化反应中的催化性能。结果表明,以N-(4-磺酸基)丁基三乙胺硫酸氢盐离子液体(IL2)为催化剂,在优化条件(θ=80℃,t=6 h,n(o-Cresol)∶n(TBA)∶n(IL2)=1∶1∶0.2)下,邻甲酚的转化率、6-叔丁基邻甲酚(6-TBC)的选择性可分别达到80.9%和44.1%,优于液体酸和固体酸的催化效果。SO3H-functionalized ionic liquids（ILs） were synthesized by using tri-alkylamine and 1,4-butanesultone as the source.The structures and physical properties of ILs were characterized by means of NMR and TG-DTG.Their catalytic performances in the alkylation of o-cresol with tert-butyl alcohol（TBA） were investigated.The influences of reaction conditions on the catalytic tert-butylation of o-cresol were studied.Meanwhile,the catalytic performance of IL was compared with those of conventional liquid acids and solid acids.The results indicated that with N-（4-sulfo group）butyl-triethylamine-hydrogen sulfate（IL2） as catalyst under optimized reaction conditions of θ=80℃,t=6 h,n（o-Cresol）∶n（TBA）∶n（IL2）=1∶1∶0.2,the conversion of o-cresol and the selectivity of 6-TBC were 80.9% and 44.1%,respectively.The SO3H-functionlized ionic liquid exhibited high catalytic activity,which was better than liquid acid and solid acid.

关 键 词：离子液体 烷基化 邻甲酚 叔丁醇(TBA) 

分 类 号：O643.32[理学—物理化学]