Abstract: HBC series catalyst and additive for boosting butenes in FCC unit have been developed by SINOPEC Research Institute of Petroleum Processing Co., Ltd., enhancing the isomerization of carbocation ions and inhibiting the hydrogen transfer reaction in the catalytic cracking process to promote the directional conversion of hydrocarbon molecules to butenes, with the new catalytic materials and optimized preparation techniques. In the commercial application, HBC-A catalyst shows the abilities of both increasing butenes and enhancing bottom cracking, the butene yield increased by more than 0.5 percentage point, while the yield of light cycle oil (LCO) and slurry decreased. HBC-B additive can be flexibly mixed with the main catalyst according to a proper proportion, showing excellent butene selectivity and certain LCO conversion ability. When HBC-B accounts for 5.0% of the catalyst inventory in the system, the butenes yield increased by 0.5~1.0 percentage point, the LCO yield decreased, and the gasoline yield changed little or increase slightly.

Key words: catalytic cracking, butene, catalyst, additive, gasoline, diesel