Abstract: Pseudo-boehmite modified kaolinite was synthesized by in situ construction, and used as matrix material for preparation of anti-iron contamination FCC catalyst. Characterization results indicated that, compared with ordinary kaolinite, the synthesized compound material had much higher surface area, pore volume and surface acidity density, up to 112 m2/g, 0.39 cm3/g and 78.3μmol/g，respectively. Catalytic cracking performance evaluation results indicated that the conversion of the modified kaolinite increased by 1.96 percentage points, slurry yield decreased by 1.22 percentage points, gasoline yield and total liquid increased by 2.08 and 2.23 percentage points, respectively, compared with the traditional FCC catalyst at the same iron pollution, indicating a good anti-iron contamination performance.

Key words: pseudo-boehmite, kaolinite, catalytic cracking catalyst, iron contamination, matrix