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

doi:10.11949/j.issn.0438-1157.20160424

Abstract

Abstract:

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 (C₂H₅)₃NHCl-FeCl₃ (mole fraction of FeCl₃ is more than or equal to 0.55) 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[(C₂H₅)₃NH] Cl-0.6FeCl₃ is 0.25, the mass content of dimers and trimers in oligomers reach up to 90.20% and conversion of isobutene is 98%.

Key words: oligomerization, ionic liquid, iron(Ⅲ) chloride, isobutene, copper (Ⅰ) chloride

摘要：

离子液体（C₂H₅）₃NHCl-xFeCl₃（FeCl₃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30 min，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/[（C₂H₅）₃NH]Cl-0.6FeCl₃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%。

关键词: 齐聚, 离子液体, 三氯化铁, 异丁烯, 氯化亚铜

CLC Number:

643.32

YANG Shuqing, ZHENG Xianmin, WANG Luhui, ZHANG Renkun, WANG Dongguang. Oligomerization of isobutene catalyzed by ionic liquid consisting of anhydrous iron trichloride[J]. CIESC Journal, 2016, 67(S1): 276-282.

杨淑清, 郑贤敏, 王路辉, 张仁坤, 王东光. 三氯化铁离子液体催化异丁烯的齐聚反应[J]. 化工学报, 2016, 67(S1): 276-282.

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