催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (7): 725-728.

• 研究快讯 • 上一篇    下一篇

AlCl3/Al-MCM-41 催化剂上萘与丙烯的烷基化反应

唐华, 纪敏, 王新葵, 贺民, 蔡天锡   

  1. 大连理工大学化学系, 辽宁大连 116012
  • 收稿日期:2010-07-25 出版日期:2010-07-25 发布日期:2010-07-25

Alkylation of Naphthalene with Propylene Catalyzed by Aluminum Chloride Immobilized on Al-MCM-41

TANG Hua, JI Min*, WANG Xinkui, HE Min, CAI Tianxi   

  1. Department of Chemistry, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2010-07-25 Online:2010-07-25 Published:2010-07-25

PDF

1235

被引次数

17

摘要： 采用两步气相法制备了 AlCl3/Al-MCM-41 催化剂, 在浆态鼓泡床反应器中考察了其催化萘和丙烯烷基化反应性能, 并通过粉末 X 射线衍射、N2 吸附-脱附、吸附吡啶红外光谱及化学分析等方法, 表征了载体的物化性质及催化剂表面酸性. 结果表明, 在萘与丙烯的烷基化反应中, 具有与 2,6-二异丙基萘 (2,6-DIPN) 分子动力学尺寸相匹配的孔道和适当的[-O-AlCl2]担载量是提高 AlCl3/Al-MCM-41 催化剂活性和选择性的关键, 其中以较大孔径的 AlCl3/H/Al-MCM-41 催化剂活性最高, 在 0.1 MPa, 85 oC 反应 5 h 时, 萘转化率达 82.1%, 2,6-DIPN 在 DIPN 中的摩尔含量达 32.2%.

关键词: 萘, 烷基化, 丙烯, 固载化, 三氯化铝, MCM-41, 浆态鼓泡床反应器

Abstract: AlCl3 catalysts immobilized on mesoporous Al-MCM-41 were prepared by a two step vapor method and their catalytic performance was evaluated for the alkylation of naphthalene with propylene in a slurry bubble column reactor. The physico-chemical properties of the supports and catalysts were characterized by X-ray diffraction, N2 adsorption, and pyridine adsorption infrared spectroscopy. The halide loadings of the catalysts were analyzed by a chemical method. For the alkylation of naphthalene with propylene over AlCl3/Al-MCM-41, pore diameters that match the molecular dimensions of 2,6-diisopropylnaphthalene (2,6-DIPN) and an appropriate amount of [–O–AlCl2] in the catalyst are key to controlling activity and selectivity. The AlCl3 catalyst immobilized on mesoporous H/Al-MCM-41 with a Si/Al ratio of 15 exhibited high activity when the alkylation was carried out at 0.1 MPa and 85 oC for 5 h. A naphthalene conversion of 82.1% and a 2,6-DIPN selectiv-ity of 32.2% were obtained.

Key words: naphthalene, alkylation, propylene, immobilization, aluminium chloride, MCM-41, slurry bubble column reactor