Abstract: The RHT technology licensed by RIPP was applied in 2.0 Mt/a residue hydrotreating unit at Anqing Company, Sinopec. The process is characterized by the cutting-out of the first reactor R-101. The 3rd generation RHT serious catalysts and the optimized catalyst grading technology developed by RIPP were adopted in first and second cycles (RUN-1 and RUN-2). Commercial applications in both runs showed that R-101 cutting out technology is feasible and the catalyst grading technology is reasonable. After R-101 is cut-out, the product quality is almost not affected and meets the requirements for RFCC feedstock; the cycle length can be prolonged for two or three months and the activity of catalyst system can be fully utilized.

Key words: residue hydrotreating, first reactor, cut-out, catalyst grading, activity, cycle length