Abstract: The efficient processing of typical macromolecular aromatic hydrocarbons in light cycle oil (LCO) has always been one of the keys to improve enterprise economic efficiency. Based on the chemical reaction network of macromolecular aromatics in LCO, through the integrated innovation of catalytic materials, process technology and reaction engineering, SINOPEC Research Institute of Petroleum Processing Co. Ltd. has successively developed the medium pressure hydro-upgrading technology (MHUG) and LCO hydrocracking to produce gasoline with high octane or aromatics technology (RLG). MHUG technology can process inferior raw materials such as LCO and coking diesel, and the clean vehicle diesel with high cetane number can be obtained through aromatics hydrogenation saturation and ring opening reaction. RLG technology can process LCO and C₉/C₁₀+ heavy aromatics, and the high-octane gasoline blending components or BTX extracts can be obtained through aromatics selective hydrogenation saturation, selective ring opening, and side chain break reaction. The development and application of the platform technology provides strong technical support for LCO upgrading, oil-to-chemicals, reducing the ratio of diesel to gasoline, and improving economic benefits.

Key words: aromatic hydrocarbon, LCO, hydrogenation upgrading, hydrocracking, MHUG, RLG