Abstract: The superiority of CDOS-FRCN Ⅱ technology applied for producing ultra-low sulfur gasoline was introduced. The splitter process (LCN/HCN) of gasoline was cut out in the technology. The technology has advantages in simple process, flexible operation, less investment, lower energy consumption. It used a new nano TiO2-based HDDO-100/HDOS-200/HDMS-100 catalyst system, which has high activity in desulfurization, selectivity and stability and is suitable for full distillate hydrodesulfurization. The catalyst system showed excellent activity and stability in treating DCC gasoline or FCC gasoline with high diene and olefin content. A new DCC gasoline hydrogenation unit with 0.5 Mt/a in CNOOC Dongfang Petrochemical Co. Ltd., achieves China V gasoline product using the technology.

Key words: DCC gasoline, CDOS-FRCNⅡtechnology, full distillate selectivity hydrodesulfurization, olefin, China V gasoline