How should the oil from the reformer outlet be handled?
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I would like to ask the students: How is the extractor oil from reformation units generally handled? (It consists of 70–80% C5 components, with the remainder being C4; its dry point is 70 degrees.) Send it out directly as takeaway or recycle it to other units? In recent days, the catalytic unit has reprocessed some of the overhead oil, which has had a significant impact on the load of the stabilizer tower; as a result, C5 is present in the liquefied gas. Is there any good solution to this problem? Thank you!
There are actually many uses for reformation stripping oil; it depends on what the refinery’s processing procedures are In the case of integrated refining and chemical processing, ethylene can be supplied, which is highly desirable; otherwise, it can be used as a blending component for gasoline or as light chemical oil for external distribution
Reply to 1# yiransunny: It is possible to proceed with diesel hydrogenation； However, it’s better to proceed with catalysis. Should you go straight to the catalytic absorption stage for stabilization? That might not be advisable, as it could lead to the problems mentioned earlier. You could try going to the lift pipe instead; the results should be good
This post was last edited by Petroman 001 on 2011-5-3 at 17:40. The purpose and destination of the oil from the pre-hydrogenation stage are determined by the process layout; in the case of a single-column distillation system, this oil has a high sulfur content and can only be used as feed for ethylene production or in other processes that involve sulfur removal. In a two-column process, it is best to send this oil to the debutanization column in the reforming unit in order to recover liquefied gas (however, the sulfur content in the oil from pre-hydrogenation may be too high, affecting the total sulfur level in gasoline)
In winter, reforming topcoat oil can be mixed into gasoline, but it’s more difficult to handle in summer. If there is ethylene cracking, it can be used as a cracking feedstock, which is very good. Or used as a feedstock for hydrogen production via light hydrocarbon cracking.
It seems that you haven’t managed your reprocessing amount well; reducing the reprocessing ratio appropriately should work. If the reprocessing ratio is too high, it will also affect the octane rating of gasoline, which is not worth it. It is recommended to control the reprocessing ratio. We just go straight into the crude gasoline tank for reprocessing. The effect is pretty good. The octane rating decreases by about 1 point. Hope it’s useful
The stripping oil from our plant is fed directly into the C4/C5 separation tower, where LPG and pentane oil are separated. The LPG is sold directly, while the pentane oil and the residue oil are mixed in certain proportions to serve as raw material for ethylene cracking.
It can be used as a component for gasoline blending or as feedstock for ethylene cracking, and its price is quite good
It can be used to produce ethylene; in addition, it seems possible to use it for high-octane gasoline components through light hydrocarbon isomerization
Are you going for catalytic reaction, distillation, or stabilized reprocessing? If the quantity is small, the impact of fractional distillation is minimal.