Catalytic cracking additive, preparation method therefor, and application thereof

A catalytic cracking additive, comprising 10-50 wt % of a modified β zeolite, 20-85 wt % of a clay, and 5-35 wt % of a boron-containing binder, based on the total weight of the catalytic cracking additive, wherein:

• the modified β zeolite is the only zeolite present in the catalytic cracking additive and comprises 0.1-1 wt % of CuO and 1-15 wt % of P2O5, and has a micro-activity index of at least 58;
• and the boron-containing binder comprises 70-97 wt % of Al2O3 and 3-30 wt % of B2O3, and has a pH value of 1.0-3.5,
• wherein the catalytic cracking additive is prepared by a method comprising the steps of:
• S1:
• mixing a B zeolite, a phosphorus source, a copper source and a first solvent, and adjusting the pH value of the mixture to 1.0-6.0 to form a slurry;
• S2:
• mixing an aluminum source, a boron source, an acid and a second solvent to obtain the boron-containing binder, the aluminum source being the sole alumina source for the catalytic cracking additive and is selected from pseudo-boehmite, alumina, aluminum hydroxide, boehmite, and combinations thereof, and
• S3:
• mixing the boron-containing binder, the slurry, a clay and a third solvent, and drying the resulting mixture and calcining the dried mixture at 300-650° C. to obtain the catalytic cracking additive.