Abstract: MHUG hydro-upgrading technology with hydrorefining catalyst RN-10B and hydrocracking catalyst RT-5 was applied in a 3.6Mt/a hydrocracking unit in CNOOC Huizhou Refining & Petrochemicals Company using the mixture of naphthenic straight-run gasoline/diesel and MIP diesel as feedstock, the main products are naphtha, 3# jet fuel and national V diesel. The ex-situ regeneration of the catalysts was conducted after continuous operation for 5 years and 6 months. The regenerated catalysts still show good activities for HDS, HDN, and cetane number improvement, equals to that of fresh one, indicating the good activity stability and regeneration performance of both the catalysts. The product distribution reaches or even better than the design value, showing the better long term operation ability of the catalysts, and lower activity declines after regeneration.

Key words: hydrocracking catalyst, RN-10B, RT-5, regeneration, reaction performance