Abstract: To promote the transition of traditional fuel-based refineries to chemical refineries, SINOPEC Anqing Petrochemical Company has implemented the resid to chemicals (RTC) technology in its 3.0 Mt/a heavy oil catalytic cracking unit. Commercial application results demonstrate that the RTC technology exhibits excellent heavy oil processing capabilities, enabling the blending ratio of hydrogenated heavy oil from the residue hydrodesulfurization unit to reach over 50%. The heavy oil catalytic cracking reaction exhibits high selectivity, with a total yield and total selectivity for light olefins and light aromatics of 40.71% and 49.67%, respectively. Specifically, the yield of ethylene and propylene is 4.34% and 19.14%, respectively. The hydrocarbon component distribution and output in the catalytic cracking gasoline can be flexibly adjusted according to market demands. The RTC reaction process achieves optimized distribution and efficient utilization of hydrogen elements in the feedstock. The RTC technology has pioneered a new path for low-cost "oil-to-chemicals" conversion, contributing to the realization of high-value utilization of resources.

Key words: heavy oil, deep catalytic cracking, ethylene, propylene, BTX, hydrogen balance