新型两步法合成高质量Silicalite-1分子筛膜  

Synthesis of High Quality Silicalite-1 Membrane by a Novel Two-Step Method

作　　者：管卉[1,2] 郑均林[2] 孔德金[2] 黄民[1] 

机构地区：[1]同济大学化学系,上海200092 [2]中国石油化工股份有限公司上海石油化工研究院,上海201208

出　　处：《化学反应工程与工艺》2009年第5期396-401,共6页Chemical Reaction Engineering and Technology

摘　　要：通过一种新颖的两步合成方法,即先用改性剂溶液对镀有二氧化硅缓冲层的多孔氧化铝(孔径0.1～0.5μm)载体管进行浸泡处理,再水热合成,制备了Silicalite-1分子筛膜,并考察了晶化温度、晶化时间对成膜的影响。采用溶胶-凝胶(sol-gel)法,在最优粘度5～25cp内制得平整连续的介孔缓冲层,达到了修饰载体材料表面性能的目的。X射线衍射(XRD)和扫描电镜(SEM)结果表明,160℃下,晶化24h得到表面致密、连续的b取向的Silicalite-1分子筛膜。A novel two-step method were used to synthesize silicalite-1 membranes on porous alumina supports(pore size of 0.1-0.5 μm).Firstly,alumina ceramic tubes with buffer layer were immersed in modifier solution for a few hours.Secondly,silicalite-1 membranes were prepared through hydrothermal synthesis.Effects of crystallization temperature and crystallization time on the growth of molecular sieve membrane were investigated.Smooth and continuous amorphous mesoporous silica buffer layer was prepared on the surface of the support using sol-gel technique.From X-ray diffraction(XRD)and scanning electron microscope(SEM)images,the compact and b-oriented silicalite-1 membrane was obtained when the conditions of crystallization were 160 ℃ and 24 h.

关 键 词：沸石膜 Silicalite-1分子筛 水热合成 晶化 

分 类 号：TB383.2[一般工业技术—材料科学与工程]