Abstract: The light naphtha produced in a hydrogenation unit of a refining and chemical enterprise is mainly used as the feedstock for the light hydrocarbon aromatization unit or sold as the feedstock for the steam cracking unit. In order to increase the value-added of the light naphtha, the C₅/C₆ of naphtha was cut precisely , and the C₆ was sent to the catalytic reforming unit for processing. After optimization, the benzene yield of the catalytic reforming unit was increased by 0.33 percentage point. At the same time, the C₅ processing capacity of the light hydrocarbon aromatization unit was increased, and the export proportion of C₅ as steam cracking feedstock was reduced. The measure can increase the benefit by 5.72 million yuan per year.

Key words: C₆, aromatic hydrocarbon, naphthene, methylcyclopentane, light hydrocarbon aromatization, catalytic reforming unit