Process for recovering hydrocracked effluent
First Claim
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1. A hydroprocessing process comprising:
- hydrocracking a diesel feed stream in a hydrocracking reactor with a hydrogen stream over hydrocracking catalyst to provide a hydrocracked stream;
separating said hydroprocessed effluent stream in a separator to provide a vaporous hydrocracked stream and a liquid hydrocracked stream;
fractionating the liquid hydrocracked stream in a first fractionation column to provide a first overhead stream comprising LPG and light naphtha and a first bottoms stream comprising heavy naphtha and kerosene;
fractionating the first overhead stream in a second fractionation column to provide a second overhead stream comprising LPG and a second bottoms stream comprising light naphtha;
fractionating the first bottoms stream in a third fractionation column to provide a third overhead stream comprising heavy naphtha and the second bottoms stream comprising distillate; and
heat exchanging the third overhead stream with a boilup stream taken from the second bottoms stream to reboil the boilup stream and return it to the second fractionation column.
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Abstract
We have discovered a process for hydrocracking a distillate stream and separating it into several product cuts including LPG, light naphtha, heavy naphtha and distillate without a stripper column. Additionally, no more than two heaters relying on external utilities are required for reboiling fractionator bottoms.
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Citations
17 Claims
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1. A hydroprocessing process comprising:
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hydrocracking a diesel feed stream in a hydrocracking reactor with a hydrogen stream over hydrocracking catalyst to provide a hydrocracked stream; separating said hydroprocessed effluent stream in a separator to provide a vaporous hydrocracked stream and a liquid hydrocracked stream; fractionating the liquid hydrocracked stream in a first fractionation column to provide a first overhead stream comprising LPG and light naphtha and a first bottoms stream comprising heavy naphtha and kerosene; fractionating the first overhead stream in a second fractionation column to provide a second overhead stream comprising LPG and a second bottoms stream comprising light naphtha; fractionating the first bottoms stream in a third fractionation column to provide a third overhead stream comprising heavy naphtha and the second bottoms stream comprising distillate; and heat exchanging the third overhead stream with a boilup stream taken from the second bottoms stream to reboil the boilup stream and return it to the second fractionation column. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A hydroprocessing process comprising:
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hydrocracking a diesel feed stream in a hydrocracking reactor with a hydrogen stream over hydrocracking catalyst to provide a hydrocracked stream; separating said hydroprocessed effluent stream in a separator to provide a vaporous hydrocracked stream and a liquid hydrocracked stream; fractionating the liquid hydrocracked stream in a first fractionation column to provide a first overhead stream comprising LPG and light naphtha and a first bottoms stream comprising heavy naphtha and kerosene; fractionating the first overhead stream in a second fractionation column to provide a second overhead stream comprising LPG and a second bottoms stream comprising light naphtha; taking a boilup stream from the second bottoms stream and returning the boilup stream to the second fractionation column; fractionating the first bottoms stream in a third fractionation column to provide a third overhead stream comprising heavy naphtha and the second bottoms stream comprising distillate; and heat exchanging the first bottoms stream with the boilup stream to reboil the boilup stream. - View Dependent Claims (11, 12, 13, 14)
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15. A hydroprocessing process comprising:
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hydrocracking a diesel feed stream, having a T5 between about 150°
C. (302°
F.) and about 200°
C. (392°
F.) and a T95 between about 343°
C. (650°
F.) and about 399°
C. (750°
F.) using the TBP distillation method, in a hydrocracking reactor with a hydrogen stream over hydrocracking catalyst to provide a hydrocracked stream;separating said hydroprocessed effluent stream in a separator to provide a vaporous hydrocracked stream and a liquid hydrocracked stream; fractionating the liquid hydrocracked stream in a first fractionation column to provide a first overhead stream comprising LPG and light naphtha and a first bottoms stream comprising heavy naphtha and kerosene; fractionating the first overhead stream in a second fractionation column to provide a second overhead stream comprising LPG and a second bottoms stream comprising light naphtha; and fractionating the first bottoms stream in a third fractionation column to provide a third overhead stream comprising heavy naphtha and the second bottoms stream comprising kerosene; and heat exchanging the first bottoms stream with a boilup stream taken from the second bottoms stream to reboil the boilup stream and return it to the second fractionation column. - View Dependent Claims (16, 17)
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Specification