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Invention Grant
CN107519922B Y/Gd2O3/ZSM-23/ZSM-5/ASA复合材料及其制备方法 有权

Y/Gd2O3/ZSM-23/ZSM-5/ASA复合材料及其制备方法
Abstract:
本发明提供了一种含有规则介孔Y/Gd2O3/ZSM‑23/ZSM‑5/ASA复合材料的制备方法，包括：制备导向剂，制备Gd2O3/ZSM‑23/ZSM‑5前驱体，采用水热晶化法合成Y/Gd2O3/ZSM‑23/ZSM‑5复合分子筛，然后在含分子筛的浆液中加入表面活性剂和碱性铝源溶液，调节pH值，沉淀后产物经洗涤、干燥、焙烧，即得Y/Gd2O3/ZSM‑23/ZSM‑5/ASA复合材料。该方法得到的复合材料中Y分子筛的差热破坏温度可大于950℃，晶粒保持在400nm以下，复合材料具有微孔－介孔的孔分布特点，并且表面ASA中的介孔为规则介孔，改变合成工艺条件，可使介孔孔径可调。
Abstract(English):

The invention provides a method for preparing a Y/Gd2O3/ZSM-23/ZSM-5/ASA composite material containing regular mesopores. The method comprises the following steps: firstly, preparing a guiding agent, preparing a Gd2O3/ZSM-23/ZSM-5 precursor; synthesizing a Y/Gd2O3/ZSM-23/ZSM-5 composite molecular sieve by adopting a hydrothermal crystallization method; adding a surfactant and an alkaline aluminum-source solution into the slurry containing the molecular sieve, adjusting the pH value; and washing, drying and roasting the precipitated product to obtain the Y/Gd2O3/ZSM-23/ZSM-5/ASA composite material. In the Y/Gd2O3/ZSM-23/ZSM-5/ASA composite material, the differential thermal failure temperature of the Y molecular sieve can be higher than 950 DEG C, the grain size is kept to be lower than 400nm. The composite material has the porous distribution characteristics of micropore-mesopore, mesopores in the surface ASA are regular mesopores, and the mesoporous size can be adjusted by changing the synthesizing process condition.

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