石油炼制与化工 ›› 2012, Vol. 43 ›› Issue (5): 14-18.

• 基础研究 • 上一篇    下一篇

氯铝酸离子液体催化异丁烯齐聚反应的研究

杨淑清1,刘植昌2,徐春明2   

  1. 1. 浙江海洋学院
      2. 中国石油大学(北京)重质油国家重点实验室
  • 收稿日期:2011-09-21 修回日期:2011-11-22 出版日期:2012-05-12 发布日期:2012-04-28
  • 通讯作者: 杨淑清 E-mail:ysqjane@163.com
  • 基金资助:

    浙江省教育厅资助项目;浙江海洋学院校级资助项目

OLIGOMERIZATION OF ISOBUTENE CATALYZED BY AlCl3 IONIC LIQUIDS

  • Received:2011-09-21 Revised:2011-11-22 Online:2012-05-12 Published:2012-04-28

摘要: 合成出具有不同阳离子和阴离子结构的离子液体,在高压釜中评价其异丁烯齐聚反应的催化性能,并且考察了反应条件对异丁烯齐聚反应性能的影响。结果表明:由AlCl3与不同有机胺盐参与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︰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︰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︰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30 min,搅拌速率1 300 r/min。

关键词: 氯铝酸离子液体, 催化, 异丁烯, 齐聚

Abstract: AlCl3 ionic liquids having various cations and anions were synthesized. Tests for oligomerization 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 AlCl3 and [C2H5]3NHCl, when the mole ratio of AlCl3 to [C2H5]3NHCl was below 1:1, the AlCl3 ionic liquid was inactive to isobutene oligomerization; when the mole ratio of AlCl3 to [C2H5]3NHCl was 1:1, the ionic liquid exhibited certain catalytic activity and its selectivity to dimers and trimers was good; when the mole ratio of AlCl3 to [C2H5]3NHCl was above 1:1, 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.