| 具有强酸位的六方和立方介孔硅铝分子筛合成及催化活性比较 |
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| 引用本文： | 李工,阚秋斌,吴通好,侯长民,黄家辉,吴淑杰,李灿.具有强酸位的六方和立方介孔硅铝分子筛合成及催化活性比较[J].高等学校化学学报,2002,23(6):1171-1173. |
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| 作者姓名： | 李工 阚秋斌 吴通好 侯长民 黄家辉 吴淑杰 李灿 |
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| 作者单位： | 1. 吉林大学化学学院, 长春 130023;
2. 中国科学院大连化学物理研究所催化基础国家重点实验室, 大连 116023 |
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| 基金项目： | 国家自然科学基金 (批准号 :2 9973 0 0 1)资助 |
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| 摘 要： | 六方 MCM- 41和立方 MCM- 48介孔分子筛是长程有序的介孔材料 ,由于其孔壁是无定形结构 ,具有较弱的酸性 ,限制了其应用范围 .若能提高它们的酸强度则可提高其在石油炼制和精细化工中的应用价值 .现已采用多种改进方法来提高其酸强度 1～ 6 ] ,但所合成的介孔材料均为六方结构 ,而具有立方结构的材料未见文献报道 .本文采用两步晶化合成法 ,用低浓度的表面活性剂合成出具有强酸位的立方介孔分子筛 ( MB48) ,还通过调节溶液的酸碱性合成出六方介孔分子筛 ( MB41 ) ,对样品的结构、酸性和催化性能进行了表征和比较 .1 实验部分1 .1 β…
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| 关 键 词： | 介孔材料 立方和六方介孔结构 酸性 烷基化 |
| 文章编号： | 0251-0790(2002)06-1171-03 |
| 收稿时间： | 2001-12-25 |
Synthesis and Catalytic Performances of Mesoporous Aluminosilicates of Cubic and Hexagonal Structure with Stronger Acid Sites |
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| LI Gong ,KAN Qiu Bin ,WU Tong Hao ,HOU Chang Min ,HUANG Jia Hui ,WU Shu Jie ,LI Can.Synthesis and Catalytic Performances of Mesoporous Aluminosilicates of Cubic and Hexagonal Structure with Stronger Acid Sites[J].Chemical Research In Chinese Universities,2002,23(6):1171-1173. |
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| Authors: | LI Gong KAN Qiu Bin WU Tong Hao HOU Chang Min HUANG Jia Hui WU Shu Jie LI Can |
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| Institution: | 1. College of Chemistry, Jilin University, Changchun 130023,China;
2. State Key Laboratory of Catalysis, Dalian Institute of Chmical Physics, The Chinese Academy of Sciences, Dalian 116023, China |
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| Abstract: | Mesoporous aluminosilicates with cubic and hexagonal structure have been synthesized by structure units of β-zeolite in a two step crystallization process and characterized by XRD, IR, N2 physical adsorption and desorption, 27Al MAS NMRand NH3 TPDtechniques. The results show that MB48(25) and MB41(25) were similar to MCM 48 and MCM-41 on the long range structure respectively and MB48 with a cubic structure can be synthesized under the condition of a lower n (CTMAB)/ n (SiO2) ratio. HMB48(25) and HMB41(25) exhibit a stronger acidic strength than conventional HMCM-41. The catalytic activity of HMB48(25) was the highest for cumene cracking and alkylation of 2,4-tert-butylphenol with tert-butylalcohol. |
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| Keywords: | Mesoporous materials Cubic and hexagonal structure Acidity Alkylation |
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