Abstract: The HBC-B catalytic additive developed by SINOPEC Research Institute of Petroleum Processing Co., Ltd. exhibits both robust heavy oil conversion capability and exceptional butylene selectivity, enabling increased butylene production without compromising gasoline yield. The industrial trial was conducted on the 2.80 Mt/a heavy oil fluid catalytic cracking (FCC) unit of SINOPEC Jingmen Petrochemical Company. The results revealed that when HBC-B constituted 4.5% of the total catalyst inventory, the overall butylene yield improved from 4.55% to 5.20%, representing a 0.65 percentage point increase (14.3% growth). Concurrently, the volume fraction of butylene in LPG rose by 2.60 percentage points while LPG yield itself increased by 0.39 percentage points. Notably, the combined production rate of slurry oil and coke decreased by 0.43 percentage points, resulting in an overall increase in the combined yield of gasoline and LPG, accompanied by a slight improvement in gasoline octane number. The commercial application results have confirmed that the HBC-B additive exhibits excellent performance in increasing butylene production, providing a reference for FCC units with a demand for boosting butylene.

Key words: heavy oil catalytic cracking, catalytic additive, butylene