High zeolite nanocrystallization ZSM-5 microsphere catalyst and preparation method thereof

The invention belongs to the technical field of catalysts, and particularly relates to a high zeolite nanocrystallization ZSM-5 microsphere catalyst and a preparation method thereof. According to the invention, the clay raw material is subjected to acid extraction to extract part of Al2O3 and impurities from the skeleton of the first clay to improve the SiO2/Al2O3 ratio of the skeleton, so that the pore structure is improved, the residual SiO2 can be activated in advance, and subsequent in-situ growth of ZSM-5 is facilitated; the extracted active Al2O3 is completely utilized, so that the loss and waste of the active aluminum are avoided; phosphorus pentoxide can be combined with aluminum oxide in the catalyst, so that the anti-wear strength of the catalyst can be improved, and the requirement on the strength of the microsphere catalyst in the high-speed fluidization process of an industrial catalytic device can be met. The high zeolite nanocrystallization ZSM-5 microsphere catalyst prepared by the invention i