Abstract: A new catalytic cracking additive HBC-B for boosting butylene yield was developed by SINOPEC Research Institute of Petroleum Processing Co., Ltd., and the commercial application was carried out on the maximizing catalytic propylene from heavy oil (MCP) unit of Yangzhou Petrochemical Co., Ltd.. The results showed that butylene yield increased by 1.47 percentage points, isobutylene yield increased by 0.34 percentage point, and the volume fraction of butylene in liquefied petroleum gas (LPG) increased by 4.05 percentage points when HBC-B additive accounts for 5.0% of the catalyst inventory in the system. The product distribution was improved, the yield of LPG increased by 0.55 percentage point, the yield of gasoline increased by 0.71 percentage point, and the yield of light cycle oil decreased by 1.28 percentage points, the yields of slurry and coke were basically the same. The commercial application results showed that HBC-B additive had excellent butylene selectivity and heavy oil cracking ability.

Key words: deep catalytic cracking, aid catalyst, butylene, isobutylene