Abstract: The No.2 catalytic cracking unit of SINOPEC SK(Wuhan) Petrochemical Company Limited had the characteristics of long reaction time, high reaction pressure and processing hydrogenated VGO feedstock, and the gasoline had low octane number and the yield of propylene and butene was low. In order to improve the economic benefits, the catalytic cracking catalyst HBC-3WH developed by SINOPEC Research Institute of Petroleum Processing Co., Ltd., was used to increase the octane number of gasoline and produce more propylene and butene. The commercial application results showed that the target product (LPG + gasoline) yield was increased by 1.04 percentage points, the relative yields of propylene, isobutylene and n-butene were increased by 1.0 percentage point, 0.45 percentage point and 0.91 percentage point,respectively, the coke yield was basically unchanged, the olefin volume fraction in gasoline was increased by 8.4 percentage points, and the research octane number was increased by 2.3.

Key words: catalytic cracking, catalyst, gasoline, octane number, propylene, butene