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在Na2OSiO2CTABH2O四元水热体系中系统地考察了晶化温度对中孔MCM41分子筛合成及其骨架结构的影响。实验结果表明,提高晶化温度虽然能明显加快晶化速率,缩短晶化时间,但同时样品的结晶度和中孔骨架结构的有序度却被迅速破坏。这些特点与传统沸石的合成过程完全不同,其原因主要是合成MCM4l时所用的模板剂及其在合成中所起的模板作用与传统沸石完全不同。相对低的晶化温度(如100℃)有利于高质量和高热稳定性的中孔MCM4l分子筛的合成。
In Na2O SiO2 CTAB H2O quaternary hydrothermal system systematically investigated the crystallization temperature of mesoporous MCM 41 molecular sieve synthesis and its skeletal structure. The experimental results show that although the crystallization temperature can significantly accelerate the crystallization rate, shorten the crystallization time, but at the same time the crystallinity of the sample and the mesostructure structure of the degree of order has been rapidly destroyed. These characteristics are completely different from those of the traditional zeolite synthesis. The main reason is that the template used in the synthesis of MCM-41 and the template used in the synthesis are totally different from the traditional zeolites. Relatively low crystallization temperature (such as 100 ℃) is conducive to the synthesis of mesoporous MCM 4l molecular sieve with high quality and high thermal stability.