氯铝酸离子液体催化异丁烯齐聚反应的研究  

OLIGOMERIZATION OF ISOBUTENE CATALYZED BY AlCl_3 IONIC LIQUIDS

作　　者：杨淑清[1] 刘植昌[2] 徐春明[2] 

机构地区：[1]浙江海洋学院石油化工学院,浙江舟山316000 [2]中国石油大学(北京)重质油国家重点实验室

出　　处：《石油炼制与化工》2012年第5期14-18,共5页Petroleum Processing and Petrochemicals

基　　金：浙江省教育厅资助项目(Y201122014);浙江海洋学院校级资助项目(21025010508)

摘　　要：合成出具有不同阳离子和阴离子结构的离子液体,在高压釜中评价其对异丁烯齐聚反应的催化性能,并且考察反应条件对异丁烯齐聚反应性能的影响。结果表明:由AlCl3与不同有机胺盐合成的离子液体具有良好的催化性能,异丁烯转化率达到95%以上;其中,由AlCl3与(C2H5)3NHCl合成的离子液体,当AlCl3与(C2H5)3NHCl摩尔比小于1时,对异丁烯齐聚反应没有催化性能,当AlCl3与(C2H5)3NHCl摩尔比等于1时,对异丁烯齐聚反应有一定的催化性能,液相产物的选择性较好,但重复性不好,当AlCl3与(C2H5)3NHCl摩尔比大于1时,异丁烯转化率达到95%以上,但是产物分布连续,选择性变差,有较多的裂化产物;反应温度、时间和搅拌速率在一定的范围内影响氯铝酸离子液体的催化活性和选择性,适宜的反应条件为温度80℃、时间30min、搅拌速率1 300r/min。AlCl3 ionic liquids having various cations and anions were synthesized. Tests for oligome- rization of isobutene catalyzed by various AlCl3 ionic liquids were conducted in an autoclave, and the effect of reaction temperature, reaction time and stirring speed was studied. Experimental results indicated that these AlCl3 ionic liquids exhibited good catalytic performance in isobutene oligomerization with conversion of isobutene over 95%. For ionic liquids synthesized by A1C13 and（C2 Hs）3NHCI, when the mole ratio of AlCl3 to（C2Hs）3NHC1 was below 1, the AlCl3 ionic liquid was inactive to isobutene oligomerization; when the mole ratio of AlCl3 to（C2 Hs）3NHC1 was 1, the ionic liquid exhibited certain catalytic activity and its selectivity to dimers and trimers was good when the mole ratio of AICla to （C2H5）3NHC1 was above 1, these ionic liquids could effectively catalyze oligomerization reactions, the conversion of isobutene reached more than 95 %, yet the selectivity to dimers and trimers declined and the product distributions were continuous with certain amount of cracking byproducts. The optimal reaction conditions were as follows： a reaction temperature of 80℃, a reaction time of 30 min and stirring speed of 1 300 r/min.

关 键 词：氯铝酸离子液体 催化 异丁烯 齐聚 

分 类 号：O643.32[理学—物理化学]