| 以硅溶胶为硅源高效合成MCM-22分子筛 |
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| 引用本文： | 刘百军,侯辉娟.以硅溶胶为硅源高效合成MCM-22分子筛[J].石油化工,2004,33(6):527-530. |
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| 作者姓名： | 刘百军 侯辉娟 |
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| 作者单位： | 石油大学(北京)中国石油天然气集团公司催化重点实验室,北京,102249 |
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| 摘 要： | 以六亚甲基亚胺(HMI)为模板剂,采用静态水热晶化法制得不同硅铝比的MCM-22分子筛,并通过XRD,SEM方法对制备的MCM-22分子筛进行了表征。结果表明,以硅溶胶为硅源,在n(HMI)/n(SiO2)为0.18~0.75、n(H2O)/n(SiO2)为35~50、n(Na)/n(SiO2)和n(OH)/n(SiO2)为0.127~0.177、n(SiO2)/n(Al2O3)为25~75的较宽范围内,在158℃晶化温度下,于5~8d内高效合成出高质量的MCM-22分子筛。同时表明,动态陈化过程有利于硅的溶解和MCM-22分子筛晶核的形成。
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| 关 键 词： | MCM-22分子筛 硅溶胶 静态晶化 水热晶化 |
| 文章编号： | 1000-8144(2004)06-0527-04 |
| 修稿时间： | 2004年1月12日 |
Highly Efficient Synthesis of Molecular Sieve MCM-22 Using Silicasol as Silicon Source |
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| Liu Baijun,Hou Huijuan.Highly Efficient Synthesis of Molecular Sieve MCM-22 Using Silicasol as Silicon Source[J].Petrochemical Technology,2004,33(6):527-530. |
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| Authors: | Liu Baijun Hou Huijuan |
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| Abstract: | MCM - 22 molecular sieves with different n (SiO2)/n (Al2O3) were synthesized via static hydrothermal route and characterized by XRD and SEM. With silicasol as silicon source,and under the conditions of n(hexamethylene imine)/n(SiO2),0.18-0.75;n(H2O)/n(SiO2),35-50;n(Na)/n(SiO2) and n(OH)/ n(SiO2),0.127-0.177;and n (SiO2)/n(Al2O3) ,25-75,a pure molecular sieve MCM-22 could be highly efficiently obtained at 158 ℃ within 5-8 days.Dynamic aging step accelerates silicon dissolution and MCM-22 crystal formation. |
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| Keywords: | MCM-22 molecular sieve silicasol static crystallization hydrothermal crystallization |
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