Alkylation of Isobutane and Isobutene in Acidic Polyether Ionic Liquids  

作　　者：Yu Fengli Gu Yulong Liu Qichun Xie Congxia 

机构地区：[1]State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology

出　　处：《China Petroleum Processing & Petrochemical Technology》2019年第3期29-35,共7页中国炼油与石油化工（英文版）

基　　金：supported by the National Natural Science Foundation of China (21476120);the Shandong Province Prioritized Development Plan (2017GGX40107);the Taishan Scholar Project of Shandong Province in China (ts201511033)

摘　　要：The Br?nsted-acidic polyether ionic liquids(ILs)with different polymerization degrees(n value)were prepared via the reaction of tetramethylguanidine and epoxy ethane,followed by successive reactions with 1,3-propane sultone and trifluoromethanesulfonic acid(TfOH).The prepared ILs were characterized by infrared spectroscopy and 1H nuclear magnetic resonance spectroscopy,and their thermal stability was determined by thermal gravimetry.The synthesized polyether ILs coupled with TfOH were used to catalyze the alkylation reaction of isobutane and isobutene for the preparation of alkylate gasoline.The polyether ILs could improve the substrate dissolution and promote the separation of the catalyst from the products.The ideal IL(n=94)was determined.The optimized alkylation reaction conditions covered:a VTfOH/VIL ratio of 0.35,a reaction temperature of 40℃,a reaction time of 50 min,and a stirring speed of 800 r/min.The conversion of isobutene was 92.4%and the selectivity for the C8-product was 81.6%.Under optimal conditions,the catalyst life was determined and TfOH showed improved cyclic performance in the polyether ILs.After 8 operating cycles,the catalytic activity of the catalyst showed negligible decline.The Br?nsted-acidic polyether ionic liquids（ILs） with different polymerization degrees（n value） were prepared via the reaction of tetramethylguanidine and epoxy ethane, followed by successive reactions with 1,3-propane sultone and trifluoromethanesulfonic acid（TfOH）. The prepared ILs were characterized by infrared spectroscopy and 1 H nuclear magnetic resonance spectroscopy, and their thermal stability was determined by thermal gravimetry. The synthesized polyether ILs coupled with TfOH were used to catalyze the alkylation reaction of isobutane and isobutene for the preparation of alkylate gasoline. The polyether ILs could improve the substrate dissolution and promote the separation of the catalyst from the products. The ideal IL（n = 94） was determined. The optimized alkylation reaction conditions covered: a VTfOH/VIL ratio of 0.35, a reaction temperature of 40 °C, a reaction time of 50 min, and a stirring speed of 800 r/min. The conversion of isobutene was 92.4% and the selectivity for the C8-product was 81.6%. Under optimal conditions, the catalyst life was determined and TfOH showed improved cyclic performance in the polyether ILs. After 8 operating cycles, the catalytic activity of the catalyst showed negligible decline.

关 键 词：ALKYLATION ALKYLATE gasoline tri fluoromethanesulfonic acid polyether-based ionic liquid ISOBUTENE 

分 类 号：TE[石油与天然气工程]