Abstract: The operation of 3 Mt/a hydrogenated gas oil (HVGO) MIP-CGP unit using HVGO as feed in Zhejiang Petrochemical Co., Ltd. was summarized and analyzed. The propylene content of liquefied petroleum gas produced by this unit was compared and analyzed by using MFP (FCC process for Marine Fuel and Propylene), MIP-CGP (Clean Gasoline and Propylene Production) and DCC (Deep Catalytic Cracking). The results showed that compared with the design value, the olefin mass fraction of the stabilized gasoline produced by MIP-CGP technology reached 15.9%, the research octane number reached 93.0, and the sulfur mass fraction was only 108 μg/g, which could be used as the high-quality raw material for producing high octane gasoline in S Zorb unit. The coke yield decreased by 0.64 percentage point, and the yield of liquefied petroleum gas increased by more than 3 percentage points, reaching a higher level of liquefied petroleum gas production by gas oil catalytic cracking. In view of the problem of the low olefin content of liquefied petroleum gas produced by HVGO MIP-CGP process, it was suggested that the MFP process should be used to improve the adaptability of the unit to increase the content of propylene and butylene in liquefied petroleum gas, and to reduce gasoline production.

Key words: hydrogenated gas oil, catalytic cracking, propylene, gasoline