Method for synthesizing NaY molecular sieves from compound clay microspheres by virtue of in-situ crystallization

The invention provides a method for synthesizing NaY molecular sieves from compound clay microspheres by virtue of in-situ crystallization. The method comprises the following steps: by taking the mixture of kaoline and acid treated diatomite as the raw material, adding chemical water, a structural a...

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Main Authors ZHAO XIAOZHENG, HU QINGXUN, LIU MINGXIA, GAO XIONGHOU, LIU HONGHAI, XIONG XIAOYUN, ZHAO HONGJUAN, TIAN AIZHEN, WANG BAOJIE, ZHANG LI
Format Patent
LanguageEnglish
Published 14.01.2015
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention provides a method for synthesizing NaY molecular sieves from compound clay microspheres by virtue of in-situ crystallization. The method comprises the following steps: by taking the mixture of kaoline and acid treated diatomite as the raw material, adding chemical water, a structural auxiliary, a dispersant and/or a reinforcing agent, mixing and pulping, and spraying to obtain microspheres; roasting the sprayed microspheres, mixing the roasted microspheres with a guiding agent, water glass and sodium hydroxide, and performing a crystallization reaction under a hydrothermal condition to obtain a crystallization product which is excellent in pore structure and wear resistance and contains 20-60% of NaY molecular sieves; and the in-situ crystallized microspheres can be taken as a precursor for preparing a catalytic cracking catalyst.
Bibliography:Application Number: CN201310293756