中华医学超声杂志

应用化学 ›› 2009, Vol. 26 ›› Issue (12): 1404-1408.

• 研究论文 • 上一篇    下一篇

中孔分子筛Al-MCM-41制备及催化合成二芳基乙烷

党富民1,甄新平2,牛春革2,孙超1,王吉德1,宿新泰1*   

  1. (1.新疆大学石油天然气教育部重点实验室 乌鲁木齐 830046；
    2.中国石油克拉玛依石化公司炼油化工研究院 克拉玛依)
  • 收稿日期:2008-11-28 修回日期:2009-04-03 出版日期:2009-12-10 发布日期:2009-12-10
  • 通讯作者: 宿新泰, 男, 博士, 副教授; E-mail:suxintai827@163.com; 研究方向：纳米材料,有机合成,催化
  • 基金资助:
    新疆自治区科技攻关重大专项项目（200732139）,校博士启动基金(BS080115)资助项目

Preparation for Mesoporous Molecular Sieve Al-MCM-41 and The Catalytic Synthesis of Diphenylethane

DANG Fu-Min1, ZHEN Xin-Beng2, NIU Chun-Ge2, SUN Chao1, WANG Ji-De1, SU Xin-Tai1*   

  1. (1.MOE Key Laboratory of Oil and Gas Fine Chemicals,Xinjiang University,Urumqi 830046;
    2.Petrochemical Research Institute,Karamay Petrochemical Company,Karamay)
  • Received:2008-11-28 Revised:2009-04-03 Published:2009-12-10 Online:2009-12-10

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摘要：

以硅酸钠为硅源、硫酸铝为铝源、CTAB为模板剂，采用水热法合成了负载型固体酸Al-MCM-41中孔分子筛催化剂，并通过X射线衍射（XRD）、热重差热分析（TG-DTA）、扫描电镜（SEM）和红外（IR）方法对其进行了表征，同时研究了该催化剂在二芳基乙烷合成反应中的催化性能。考察了各种反应因素的影响，确定其最佳合成条件为：原料苯乙烯与二甲苯质量之比为1∶7.5，催化剂用量为1 %(总投料质量百分比)，反应时间为3 h，反应温度为140 ℃，产率可达87.1 %，比传统催化剂浓硫酸提高了17 %。研究结果表明，该催化剂是替代液体酸合成二芳基乙烷的理想固体酸催化剂。

关键词: Al-MCM-41，苯乙烯，二甲苯，二芳基乙烷

Abstract:

Al-MCM-41 mesoporous sieves were synthesized by using Na2SiO3 as silica source, Al2(SO4)3 as aluminum source, and cetyltrimethylammonium bromide (CTAB) as template agent under hydrothermal condition. The Al-MCM-41 mesoporous sieves were characterized by X-ray diffraction (XRD), thermogravimetry differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and infrared spectroscopy (IR). The synthesis of diphenylethane over Al-MCM-41 catalyst and its catalytic performance were investigated. The results showed that the optimal conditions were: the mass percent of catalyst is 1 % of feed stock; molar ratio of xylene to styrene is 7.5: 1; reaction temperature is 140 °C and reaction time is 3 h. The yield of diphenylethane under such conditions was about 87.1 %, which was 17 % higher than the yield when using traditional sulfuric acid as catalyst. The results showed that Al-MCM-41 is a promising solid acid catalyst for synthesis of diphenylethylane instead of liquid acid.

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