Abstract: Two hydrofining catalysts, oxidation state RS-1(O) and sulfurized state RS-1(S), developed by Research Institute of Petroleum Processing were applied in the pre-hydrofining of 1.20 Mt/a CCR unit of SINOPEC Zhenhai Company, and the startups of using these two catalysts were reviewed. The commercial results showed that the hydrofining performances of both catalysts were excellent, the startups were successful and the properties of treated feeds well met the requirements of CCR process. As a comparison, when using RS-1(S) catalyst the startup was less pollutive, less time consuming, more cost saving, more reliable and with simple startup procedure.

Key words: CCR, Hydrogenation catalyst, startup