Cu对离子液体异丁烷/丁烯烷基化反应选择性的影响研究  

Study on the selectivity of isobutane /2-butene alkylation catalyzed by ionic liquid with Cu compound

作　　者：刘鹰[1] 孙宏娟[1] 丛迎楠 胡瑞生[1] 

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021

出　　处：《燃料化学学报》2014年第8期1003-1009,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21266015)

摘　　要：合成并表征了[BMIm]Cl-1.8AlCl3-0.5CuCl、[Et3NH]Cl-1.8AlCl3/CuAlCl4等离子液体,考察了含Cu离子液体等酸性催化剂中的异丁烷/丁烯烷基化反应,研究了Cu对离子液体烷基化选择性的影响。结果表明,Cu的引入对离子液体酸性的影响较小,不是反应选择性提高的主要原因,而烷基化过程中CuAlCl5-/CuAlCl4等配合物的存在,以及它们对2-丁烯的络合吸附是改善离子液体催化选择性的关键因素。相同反应条件下,[Et3NH]Cl-1.8AlCl3/CuAlCl4、[BMIm]Cl-1.8AlCl3/CuAlCl4等催化剂的三甲基戊烷选择性最高可达87.5%(质量分数),产物辛烷值100.5,明显优于硫酸、常规氯铝酸离子液体和复合离子液体等烷基化汽油辛烷值。The Cu-containing ionic liquids （IL）, like [BMIm] Cl-1. 8AlCl3-0. 5CuCl and [Et3NH] Cl-1. 8 AlCl3 / CuAlCl4, were synthesized and characterized. The selectivity of isobutene / butene alkylation of Cu-containing IL was also investigated. The results showed that the selectivity had little relation to the acidity of Cu-containing IL. The research octane number （RON） of [Et3NH]Cl-1. 8AlCl3 / CuAlCl4 alkylate could be higherthan 100, which was better than those obtained by sulfuric acid, common chloroaluminate IL, and composite ILunder the identical reaction conditions. The complexation of CuAlCl4 with 2-butene in alkylation process shouldbe accounted for the super selectivity of trimethylpentane （TMP） of isobutane alkylation catalyzed by Cu-containing IL.

关 键 词：离子液体 异丁烷 烷基化 选择性 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]