作　　者： ; ; ; ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《华南理工大学学报（自然科学版）》 2007年第6期86-90,115,共6页

摘　　要： 分别用微波晶化、常温晶化、水热晶化3种方法合成MCM-41中孔分子筛,详细比较了这3种合成方法在操作参数和所合成分子筛物性方面的差异.实验结果表明,微波法合成的MCM-41中孔分子筛品质优于常温晶化法合成的分子筛,与传统的水热晶化法相当,甚至在某些方面优于水热晶化法.微波晶化法具有下列明显的优势：节能、操作便利、环境污染少,且在实验过程中无转晶现象;合成时间短,较传统水热晶化法省时3-4倍;样品比表面积可达1000m^2/g以上,晶粒直径小至30nm,且呈高度均匀分散分布,结构致密,孔径最可几分布极窄,孔容积可达1.178mL/g,具有良好的高温稳定性（大于900℃）及水热稳定性（分子筛孔壁厚可达2.55 nm）.因此微波晶化法完全有望取代传统的水热晶化法,成为制备MCM-41中孔分子筛的实用化技术. Meso-pore zeolite MCM-41 was synthesized by means of microwave crystallization, room-temperature crystallization and hydrothermal crystallization. Then, the operation parameters of these three methods and the physical properties of the resulted MCM-41 were compared in detail. Experimental results suggest that （1） MCM- 41 prepared via microwave crystallization possesses better properties than that prepared via room-temperature crystallization, even better than that prepared via the traditional hydrothermal crystallization; （2） microwave crystallization is energy-saving and eco-friendly, and is easy to operate without crystalline conversion in the crystallization process; （3） the synthesis period of microwave crystallization is 2 -3 times less than that of the traditional hydrothermal crystallization; （4） the resulted MCM-41 prepared via microwave crystallization possesses high dispersion degree, narrow pore size distribution, good thermal stability （more than 900 ℃ ） and excellent hydrothermal stability, and is of a specific surface area of more than 1000 m^2/g, a crystal diameter of 30 nm, a pore volume of 1. 178 mL/g and a pore wall thickness of 2. 55 nm. It is thus concluded that the microwave crystallization, instead of the traditional hydrothermal one, will become a practical technology for synthesizing MCM-41.

关 键 词： 分子筛 微波晶化 常温晶化 水热晶化

领　　域： [化学工程]