高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (8): 1385.

• 研究快报 • 上一篇    下一篇

三氯化铝固载化的新方法

蔡天锡, 贺民, 石先哲, 宋朝霞, 曹殿学   

  1. 精细化工国家重点实验室, 大连理工大学化工学院, 大连 116012
  • 收稿日期:2001-01-20 出版日期:2001-08-24 发布日期:2001-08-24
  • 通讯作者: 蔡天锡(1938年出生),男,博士,教授,博士生导师,从事催化化学及新工业催化剂开发研究.

New Approaches to Immobilization of Aluminium Chloride on γ-Al2O3

CAI Tian-Xi, HE Min, SHI Xian-Zhe, SONG Zhao-Xia, CAO Dian-Xue   

  1. State Key Laboratory for Fine Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
  • Received:2001-01-20 Online:2001-08-24 Published:2001-08-24

关键词: AlCl3固载化, &gamma, -Al2O3, 异丁烯聚合

Abstract: The method of preparation of AlCl3 catalyst immobilized on γ-Al2O3 was investigated. AlCl3 generated by reacting CCl4 with pure γ-Al2O3 at 500℃ and γ-Al2O3 with bimodal meso-and macro-pore structure were used as immobilizing agent and support, respectively, to prepare the catalyst. The effect of various factors of immobilization conditions on catalytic property in isobutene polymerization was examined. The catalyst, in which the mass fraction of AlClx is about 7.5 and x=2.2, showed a high activity, selectivity and stability, and no considerable differences in the catalytic behavior were founDIn the following ranges: reaction temperature, 300-400 ℃; reaction time, 0.5-4.0 h; flow of CCl4 of adding, 1.15-2.01 mL/h for 15 mL γ-Al2O3. Additionally, it was shown that the catalytic property in isobutene polymerization is not only dependent on the nature of support, but also on its geometric structure. Compared with the catalysts having micro-porous and meso-porous structure which showed a poor stability, the catalyst with meso-and macro-pore bimodal structure exhibited a very high stability, and was supposed to be most suitable one, anDIt was ascribed to that in the case of the latter, harmfuLInfluence of intraparticle diffusion caused by "pore clogging" of large product molecules in the pore channel effectively reduced.

Key words: AlCl3 immobilization, γ-Al2O3, Isobutene polymerization

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