Home › Forums › CatCracking › FCC Process › Catalyst Flushing This topic contains 0 replies, has 1 voice, and was last updated by Hedewandro Lucredi 2 years, 9 months ago. Author Posts May 29, 2018 at 12:13 pm #28591 Hedewandro LucrediParticipant We usually do a catalyst flushing in order to save catalyst. We measure and control the specific área and metals. We usually mix 1 e-cat with 2 new catalyst. What are the criterias to do flushing in the FCCU ? Author Posts You must be logged in to reply to this topic.