Abstract: As the high-load operation of the reforming unit was resumed to increase hydrogen production to meet the demand of hydrogenation unit, and the output of reformate oil also increased. At the same time, as the chemical and chemical fiber market was in a downturn, the aromatics complex unit of SINOPEC Luoyang Company adopted the operation mode of "pumping up extraction load and lowering load of p-xylene":The reformate pre-fractionation unit and liquid-liquid extraction unit operated at high load, while the disproportionation unit of xylene unit was stopped; and the isomerization unit, xylene fractionation unit and adsorption separation unit operated with low load; optimizing the processing mode of the extraction unit inside the plate and the toluene production process, shutting down the o-xylene tower, optimizing the C₈ aromatics external rejection process and the operation parameters of the heavy aromatics tower. By comprehensive adopting the above measures, the energy consumption and material consumption of the aromatics complex unit were effectively reduced, and the monthly cost reduction and efficiency increase were realized by 1.82 million Yuan per month.

Key words: aromatics complex unit, toluene, p-xylene, o-xylene tower