Vacuum and atmospheric re-refining catalytically stabilized gasoline
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After catalytic stabilization of vacuum distillation refined gasoline, the propylene and methanol contents in the gas stream increase; changes in the feedstock used for reforming lead to an increase in the pre-hydrogenation temperature to over 30 degrees? Is there anyone who can explain what’s going on?
What is the purpose of reprocessing catalytically stabilized gasoline through atmospheric and vacuum distillation?
Catalytically stabilized gasoline is produced from catalytic startup and shutdown residues, reducing inventory holding
I suggest that your plant make more changes to the processes during the next maintenance session. Dirty oil can be reprocessed either at normal pressure or under catalytic conditions. In the event of an accident or when the plant needs to stop operating and remove materials, it is possible to transfer gasoline and diesel to their respective storage tanks, and it is also possible to bring back the dirty oil from those storage tanks for reprocessing. This requires modifications not only to the processes within the plant itself but also to those in the storage areas. The same is true for liquefied gas; it can be refined not only from stable, purified gas streams but also by reprocessing materials derived from those sources. Given that you cannot change the current situation, it is recommended to reduce the amount of reprocessing.
It has nothing to do with the propylene produced in the amylaceous fraction, right?
Does catalytically stabilized gasoline also not contain oxygen? It is necessary to determine where the oxygen content comes from in order to solve the problem. Perhaps your stable gasoline vapor pressure is high, containing C4 compounds; the degassing in the regeneration process is inadequate, resulting in some oxygen content, which in turn increases the methanol level in the liquefied gas. Stable gasoline contains a certain amount of olefins, which leads to an increase in hydrogenation temperature
Treat restructuring like refining anything else! ! !
Refining catalytic gasoline through atmospheric and vacuum distillation isn’t very good; a large vapor load has a significant impact on the atmospheric distillation column, and it can even cause the trays to be overturned