Abstract: As demand for diesel continues to slump, the reduction of LCO becomes the major concern for oil refineries. LTAG（LCO To Aromatics and Gasoline）is the technology developed by RIPP to convert LCO into high octane gasoline or light aromatics, where the technical parameters of hydrogenation and catalytic cracking are comprehensive considered and optimized to maximize the production of high octane gasoline. To use LTAG technology, the 2.0Mt/a RFCC unit of Yansan refinery was revamped, and the original lubricating oil hydrogenation device was used as LCO hydrotreating unit. As a result, the gasoline yield is increased from 43.2% to 51.8%, the yield of diesel oil is decreased from 20.5% to 5.9%, the LPG yield is increased from 17.5% to 21.5%, the yields of dry gas and slurry are increased by 0.9 and 1.5 percentage points, respectively, while the coke make is lowered by 0.4 percentage points. The benzene content in gasoline is raised from 1.00% to 1.65%, the aromatics mass content is increased to 38.36% from 34.11%. The RON is increased by 2 units. The adoption of LTAG greatly reduces the amount of LCO output for the refinery.

Key words: LTAG technology, FCC, LCO, hydrogenation, gasoline yield, RON