Abstract: Fluid catalytic cracking (FCC), as a core process in the petroleum refining industry, is crucial to China's energy demands and the development of the petrochemical industry. By addressing the contradictions between thermal and catalytic reactions, as well as between unimolecular and bimolecular reactions, innovations in FCC technology have been propelled. SINOPEC Research Institute of Petroleum Processing Co., Ltd. has developed various catalytic materials,catalysts and processes, such as SRNY zeolite and Min-Coke catalysts, significantly enhancing heavy oil conversion efficiency and reducing coke yield. The development of the series olefin-reducing catalyst GOR and the variable-diameter fluidized bed reactor technology has successfully met the requirements for unleaded gasoline and environmental protection, driving the upgrade of China's gasoline quality. Additionally, the development of catalytic cracking technologies (such as DCC and CPP) and the maximum selective catalytic cracking (MSC) process has achieved the goal of transitioning from refining to chemicals production, improving the production efficiency of light olefins and clean fuels. The innovative thinking and technological breakthroughs in FCC have not only advanced the development of FCC technology in China but also provided significant references for the global refining industry.

Key words: fluid catalytic cracking, catalyst, zeolite, variable-diameter fluidized bed, reactor, deep catalytic cracking, light olefin