Abstract: In the current situation of excess diesel capacity and increasingly saturated market demand for diesel, SINOPEC Zhenhai Refining and Chemical Company modified its two existing 3.0 Mt/a diesel hydrogenation units for cracking upgrading. By loading some cracking catalysts and taking a series of supporting modification measures, the naphtha yield after modification is increased by 3% to 10% respectively, and the diesel-gasoline ratio of the company is reduced by 0.13%, which improves the economic benefits of the refinery and provides direction and experience for modification of similar units.

Key words: diesel-gasoline ratio, diesel hydrogenation, cracking upgrading