Yuan Wenhui, Lin Y S, Yang Weishen
Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA.
J Am Chem Soc. 2004 Apr 21;126(15):4776-7. doi: 10.1021/ja031653t.
Molecular sieving MFI-type zeolite membranes were prepared by a secondary growth method without using an organic template. Silicalite membranes with intercrystalline pores minimized or eliminated were obtained by this synthesis method which avoids the template removal step. The silicalite membrane exhibits molecular sieving characteristics with pervaporation separation factor for p-xylene to o-xylene or m-xylene of as high as about 70, the highest ever reported for a pervaporation membrane.
采用二次生长法，在不使用有机模板的情况下制备了具有分子筛作用的MFI型沸石膜。通过这种合成方法避免了模板去除步骤，从而获得了晶间孔最小化或消除的硅沸石膜。该硅沸石膜表现出分子筛特性，对二甲苯与邻二甲苯或间二甲苯的渗透汽化分离因子高达约70，这是有报道以来渗透汽化膜的最高值。
