Porous spherical propylene polymerization catalyst and preparation method thereof

The invention relates to a porous spherical propylene polymerization catalyst and a preparation method thereof. The preparation method comprises the following steps: reacting a magnesium compound and an organic alcoholic compound, and contacting a product with a carboxylic acid ramification to generate an internal electron donor in situ; adding a halogenated alkane solution which contains a template agent to a system; mixing a formed mixture with a titanium compound for reaction, and adding an emulsifying agent and a turbulence weakening agent to form a stable liquid-liquid two-phase system; increasing the temperature of the formed liquid-liquid two-phase system for solidification, and precipitating solid granules to obtain a suspending liquid; washing the suspending liquid by using the halogenated alkane solution to remove the template agent, washing by using an inert hydrocarbon solvent, and drying in hot nitrogen to obtain catalyst granules. The porous spherical propylene polymerization ...