Average continuous catalyst regeneration

Fresh hydrofluoric acid used for catalyst make-up is anhydrous and of 99.5%+ purity. Since the acid in the unit is continually being regenerated, the only hydrofluoric acid consumed in the process is that which is absorbed in the bauxite towers, lost to the acid tar, lost in handling, or lost through venting equipment and lines for maintenance access. Typically, hydrofluoric acid consumption, including losses to all sources, will average about 0.5 to 0.8 pound per barrel of alkylate. 

In the pilot-scale experiments, the continuous reaction-regeneration is also investigated. The details of the results will not be discussed here. However, we wiU focus on the influence of the average residence time and catalyst to methanol on the MTO reaction in pilot-scale fluidized bed reactor. 

One of the typical features of the FCC operation is the continuous regeneration of the catalyst which is being circulated. The average catalyst goes undergoes 10.000 to 50.000 regeneration cycles. 

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