Abstract: In order to optimize the enterprise product structure and improve the economic efficiency, SINOPEC Anqing Company built a new 1.0 Mt/a LCO hydrocracking unit using RLG technology developed by SINOPEC Reserach Institute of Petroleum Processing to produce high octane number gasoline with relative hydrofining catalyst and hydrocracking catalyst. The unit has been operating safely for 18 months under the condition of processing 100% low quality LCO raw materials. The calibration results after long term operation showed that the yield of high octane gasoline component was 45%-60% and RON was 90-95, sulfur mass fraction was less than 2 μg/g; at the same time, the diesel cetane index was improved by 12-14 units, sulfur mass fraction was less than 5 μg/g, indicating that RLG realized the efficient conversion of FCC LCO into high octane gasoline with good qualities and diesel products and low gas yield. The adoption of RLG technology reduced the ratio of diesel to gasoline from 1.03 to 0.74, and the economic benefit was significantly improved.

Key words: FCC diesel, hydrocracking, long cycle operation, diesel/gasoline ratio