三氯化铁离子液体催化异丁烯的齐聚反应

Oligomerization of isobutene catalyzed by ionic liquid consisting of anhydrous iron trichloride

离子液体(C_2H_5)_3NHCl-xFeCl_3(FeCl_3摩尔分率x≥0.55)对异丁烯齐聚反应具有良好的催化性能。在反应温度40℃,反应时间30min,酸烃比为1.2∶1的条件下,异丁烯齐聚转化率达到85%,液相产物中二聚物和三聚物的含量之和达到80%以上。在离子液体中引入适量CuCl可以提高异丁烯的转化率。当CuCl/[(C_2H_5)3NH]Cl-0.6FeCl_3的摩尔比为0.25时,异丁烯的转化率达到98%,液相产物中二聚物和三聚物的含量之和高达90.20%。

The oligomerization of butene is one of important process in chemical and oil refining industries.Its products are important chemical raw materials.Liquid isobutene oligomerization is investigated in a batch autoclave.The ionic liquid(C_2H_5)_3NHCl-FeCl_3(mole fraction of FeCl_3 is more than or equal to0.55)shows good catalytic performance for the oligomerization of isobutene.Under good operating conditions,conversion of isobutene is above 85%,and the total mass content of dimers and trimers in oligomers is above 80%.Addition of CuCl in the ionic liquid can increase both isobutene conversion and the selectivity of dimers and trimers.When the mole ratio of CuCl to[(C_2H_5)_3NH]Cl-0.6FeCl_3 is 0.25,the mass content of dimers and trimers in oligomers reach up to 90.20% and conversion of isobutene is 98%.