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Being a main conversion process,FCC is evolving toward processing more heavier and dirtier feeds,and to produce varied product slates to meet the local market demands.Frequently many of the product demands made on the FCC process operator are seemingly contradictory.However,with the advance of FCC process and catalyst manufacture technology over the past few years,these contradictories can be solved profitbaly.Daqing VR FCC,maximized distillate production(MDP) technique and the maximizing gas and distillate(MGD) process are the examples.Specific data of each example will be revealed and shown on the poster.