Abstract: The industrial application of ROC-1 catalyst for improving ring-opening reaction to produce high octane gasoline in SINOPEC Qilu Company was described.The first application showed that the yield of gasoline increased by 0.43 percentage point with RON improvement of 0.6,the liquid yield increased by 1.27 percentage points,the yield of coke decreased by 0.68 percentage point under uniform operating condition.The distribution of product was significantly improved through increasing the yield of high octane gasoline and decreasing coke selectivity.The apparent selectivity of the ring-opening cracking reaction of polycyclic naphthenes and napthenic aromatics increased by 18.37%.ROC-1 catalyst has stronger ability to promote the conversion of polycyclic naphthenes and napathenic aromatics,and is suitable for processing of catalytic cracking feedstock rich in naphthenes.

Key words: catalytic cracking, catalyst, ring-opening cracking, octane number, gasoline