催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (4): 357-363.

• 研究论文 • 上一篇    下一篇

介孔硅铝分子筛的合成、表征及其作为固体酸催化苯酚与1-辛烯的烷基化反应

Zahra MEHRABAN1, Faezeh FARZANEH1, Mehdi GHANDI2, Alireza ABBASI2   

  1. 1 埃尔扎哈卡大学化学系, 德黑兰 1993891176, 伊朗; 2 德黑兰大学理学院化学系, 德黑兰 141556455, 伊朗
  • 收稿日期:2007-04-25 出版日期:2007-04-25 发布日期:2011-03-28

Synthesis and Characterization of Mesoporous Aluminum Silicate as a Remarkable Solid Acid Catalyst for Alkylation of Phenol with 1-Octene

Zahra MEHRABAN1, Faezeh FARZANEH1, Mehdi GHANDI2, Alireza ABBASI2   

  1. 1 Department of Chemistry, University of Alzahra, Vanak, Tehran 1993891176, Iran; 2 School of Chemistry, University College of Science, University of Tehran, Tehran 141556455, Iran
  • Received:2007-04-25 Online:2007-04-25 Published:2011-03-28

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摘要： 以异丙醇铝、硅酸四乙酯和十六烷基三甲基溴化胺为原料,以乙酰丙酮为螯合剂,采用溶胶-凝胶法合成了硅铝比分别为25, 50, 100和150的介孔硅铝分子筛,并用其催化苯酚与1-辛烯的液相烷基化反应. X射线衍射、 N2吸附、高分辨透射电镜及 27Al 核磁共振光谱表征结果表明,该介孔分子筛具有蠕虫状骨架结构. 在160 ℃时,硅铝比为25的介孔硅铝分子筛催化剂上苯酚可以完全转化为单烷基苯酚.

关键词: 介孔硅铝分子筛, 溶胶-凝胶法, 乙酰丙酮, 苯酚, 1-辛烯, 烷基化

Abstract: Mesoporous aluminum silicate molecular sieves with Si/Al molar ratios of 25, 50, 100, and 150 were synthesized from aluminum isopropoxide, tetraethylorthosilicate, and cetyltrimethylammonium bromide by the sol-gel method using acetylacetone as the chelating agent. The results of X-ray diffraction, N2 adsorption, high-resolution transmission electron microscopy, and 27Al nuclear magnetic resonance showed that a mesoporous molecular sieve with a wormhole framework structure was formed. The synthesized molecular sieve with a Si/Al molar ratio of 25 successfully catalyzed the alkylation of phenol with 1-octene at 160 ℃ in liquid phase to the monoalkyl-substituted product quantitatively.

Key words: mesoporous aluminum silicate, sol-gel method, acetylacetone, phenol, 1-octene, alkylation