微波辅助晶化法合成MCM-22分子筛的研究  

A Study on Microwave-Assisted Synthesis of MCM-22 Zeolite

作　　者：凌云[1] 郑玉婷[1] 刘月明[1] 王振东[1] 吴海虹[1] 吴鹏[1] 

机构地区：[1]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《化学学报》2010年第20期2035-2040,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.20873043;20925310);上海市科委(Nos.08JC1408700;09XD1401500);国家重点基础研究发展"973"计划(No.2006CB202508);国家高技术研究发展"863"计划(Nos.2007AA03Z342;2008AA030801);上海市重点学科建设(No.B409)资助项目

摘　　要：开展了微波辅助法合成MCM-22分子筛的研究,经过29h微波晶化得到了与传统水热法合成5d相同的100%晶化的样品,有效地缩短了合成时间.通过XRD,SEM,FT-IR,ICP和27AlMASNMR技术表征,微波辅助合成样品具有高纯度、均一形貌,Al原子有效进入骨架等特征.对合成中的关键性条件,如结构导向剂的含量进行了深入研究,并给出了可能的合成机理.此外,通过在合成液中添加少量高介电损失物质,进一步缩短了合成时间.MCM-22 zeolite has been synthesized successfully from hydrogels with microwave （MW） heating method,the process of which was compared with that of conventional hydrothermal synthesis （HTS）.The MW-assisted heating showed a significant advantage that it reduced greatly the crystallization time.For instance,it led to a fully crystallized MCM-22 within 29 h in contrast to 5 d required by HTS synthesis.Microwave-assisted MCM-22 had good quality in phase purity,crystallinity,textual properties and incorporated tetrahedral Al ions as evidence by the characterizations with XRD,SEM,FT-IR,ICP and 27Al MAS NMR techniques.The paramount role of structure-directing agent in the MW-assisted process has been investigated to give a possible mechanism of crystallization.Moreover,by adding a small amount of alcohols in the initial gels,the crystallization time was further shortened to 24 h.

关 键 词：MCM-22 沸石 微波合成 水热合成 

分 类 号：TQ424.25[化学工程]