Preparation method of NaY/kaolin composite microspheres

The invention provides a preparation method of NaY/kaolin composite microspheres. The preparation method comprises the following steps: step 1, mixing and grinding part of kaolin and alkali; step 2, mixing the mixture obtained in the step 1 with unground kaolin, pulping, and spraying to obtain kaolin microspheres; and step 3, roasting the kaolin microspheres at high temperature, then mixing with water, alkali liquor, a silicon source and a guiding agent, and crystallizing to obtain the NaY/kaolin composite microspheres. The in-situ crystallized kaolin microsphere product prepared by the method has higher crystallinity of the Y-type molecular sieve and more pore volumes of mesopores and macropores. 本发明提供了一种NaY/高岭土复合微球的制备方法，包括如下步骤：步骤1，将部分高岭土与碱混合研磨；步骤2，将步骤1得到的混合物与未研磨高岭土混合、打浆、喷雾，得到高岭土微球；步骤3，将所述高岭土微球高温焙烧，然后与水、碱液、硅源、导向剂混合，晶化，得到NaY/高岭土复合微球。采用本发明制备的原位晶化高岭土微球产物具有更高的Y型分子筛结晶度和更多的中大孔孔容。