Abstract: Light olefins are important petrochemical raw materials, mainly produced by steam cracking, fluid catalytic cracking, olefin cracking process and methanol to olefins. Through technical characteristics analysis of the mentioned processes, it is found that the ratio of ethylene to methane in steam cracking and fluid catalytic cracking processes is too low, accompanied by high methane yield. The source of crude materials for the olefin cracking process is insufficient, while that of methanol to olefins process mainly comes from coal to methanol, resulting in high carbon emissions. Given the existing series of scientific problems in the production of light olefins, the targeted cracking to olefin process is proposed. The innovation is carried out from three aspects of feedstock structure, catalyst active component and catalytic reaction engineering. Through deep integration of existing technologies, four different schemes for producing ethylene + propylene + butene, ethylene + propylene, propylene and propylene + butene are formed, and the production schemes can be flexibly switched.

Key words: ethylene, propylene, butene, fluid catalytic cracking, production plan