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US 10,800,982 B2Granted
Processing scheme for production of low sulfur bunker fuel
AssigneeIFP Energies nouvelles (IFPEN)
InventorsEric D. Peer, John E. Duddy, Sophie M. Babusiaux
Life of this patent
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Abstract
This invention describes a novel and efficient processing scheme that can be used to transform a vacuum residue feedstock into 0.5 wt % sulfur bunker fuel that fulfills the specifications required by the International Maritime Organization (IMO).
Claims20
A novel process configuration for the production of low sulfur fuel products from heavy residue feedstocks comprising:
- a) feeding a feedstock comprising a heavy oil, and a hydrogen stream to one or more ebullated-bed reactors to provide a first effluent;
- and
- b) feeding said first effluent from said one or more ebullated-bed reactors to a separation section comprising separation vessels, said separation vessels independently maintained at different temperatures and pressures within each said separation vessel to recover hydrogen-rich gases and liquid effluents, and
- c) feeding said liquid effluents from said separation section to an atmospheric distillation unit and thereafter sending the bottoms from said atmospheric distillation unit to a vacuum distillation unit to recover a vacuum residue stream, vacuum gas oil stream(s), naphtha stream(s), and middle distillate stream(s);
- and
- d) feeding a light cycle oil stream from a fluid catalytic cracking unit and a second hydrogen stream to a fixed-bed or ebullated-bed hydrodesulfurization unit to provide a second liquid effluent and a hydrogen-rich vapor stream wherein said second hydrogen stream flows once-through said fixed-bed or ebullated bed hydrodesulfurization unit and is obtained at least in part from said hydrogen stream from step (a) via a common multi-stage hydrogen compression system and wherein there is no separate make-up or recycle compressor fluidly connected to said fixed-bed or ebullated-bed hydrodesulfurization unit;
- and
- e) feeding said hydrogen-rich vapor stream from step (d) back to a different stage of said common multi-stage hydrogen compression system where it is further compressed to be fed to step (a);
- and
- f) fractionating said second liquid effluent in a stripping column to separate a wild naphtha stream and a stabilized low sulfur light cycle oil stream;
- and
- g) blending said low sulfur light cycle oil stream with said vacuum residue stream from step c) to provide a final fuel oil product;
- and
- wherein said final fuel oil product contains no more than 0.5% weight percent sulfur, less than 18% weight percent conradson carbon residue, less than 350 wppm vanadium, a density of less than 991 kg/m3 at 15° C., less than 0.1 weight percent sediment by IP-390, and a viscosity of less than 380 centistokes at 50° C.
11 more elements
A novel process configuration for the production of low sulfur fuel products from heavy residue feedstocks comprising:
- a) feeding a feedstock comprising a heavy oil, and a hydrogen stream to one or more ebullated-bed reactors to provide a first effluent;
- and
- b) feeding said first effluent from said one or more ebullated-bed reactors to a separation section comprising separation vessels, said separation vessels independently maintained at different temperatures and pressures within each said separation vessel to recover hydrogen-rich gases and liquid effluents, and
- c) feeding said liquid effluents from said separation section to an atmospheric distillation unit and thereafter sending the bottoms from said atmospheric distillation unit to a vacuum distillation units to recover a vacuum residue stream, vacuum gas oil stream(s), naphtha stream(s), and middle distillate stream(s);
- and
- d) feeding a light cycle oil stream from a fluid catalytic cracking unit and a second hydrogen stream to a fixed-bed or ebullated-bed hydrodesulfurization unit to provide a second liquid effluent and a hydrogen-rich vapor stream wherein said second hydrogen stream is obtained from the said hydrogen-rich gases in step (b) and thereafter flows once-through the said fixed-bed or ebullated-bed hydrodesulfurization unit and further wherein said hydrogen-rich vapor stream from step (d) is thereafter returned to said separation section in step (b);
- and further where said hydrogen rich gases from step (b) are compressed and fed to step (a) and wherein there is no separate make-up or recycle compressor fluidly connected to said fixed-bed or ebullated-bed hydrodesulfurization unit of step d);
- and
- e) fractionating said second liquid effluent in a stripping column to separate a wild naphtha stream and a stabilized low sulfur light cycle oil stream;
- and
- f) blending said low sulfur light cycle oil stream with said vacuum residue stream from step c) to provide a final fuel oil product;
- and
- wherein said final fuel oil product contains no more than 0.5% weight percent sulfur, less than 18% weight percent conradson carbon residue, less than 350 wppm vanadium, a density of less than 991 kg/m3 at 15° C., less than 0.1 weight percent sediment by IP-390, and a viscosity of less than 380 centistokes at 50° C.
10 more elements
Dependencies are inferred from the claim text.