Abstract: Based on the study of the reaction chemistry of DCC to produce ethylene, propylene and light aromatics, DCC plus technology with high propylene selectivity and CPP technology with ethylene and propylene production were developed, forming a DCC technology platform to meet the product needs of different users. The deep hydrotreating technology of DCC feedstock was developed. Its desulfurization rate is over 95%, denitrogenization rate is over 65%, carbon residue removal rate is over 76%, and metal removal rate is about 98%. According to the characteristics of DCC products, the characteristic chemical utilization technologies, such as dry gas liquid method for ethylbenzene, direct oxidation of propylene to epoxide, extraction distillation of DCC naphtha for BTX and hydrocracking of DCC light oil for BTX, have extended the industrial chain of DCC technology platform. All these have been successfully applied in chemical refining projects, creating a refining and petrochemical integration technology route in line with China's national conditions.

Key words: deep catalytic cracking, ethylbenzene, propylene oxide, extractive distillation, industrial chain, industrial application