Resid hydrotreating with resins
First Claim
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1. A hydrotreating process, comprising the steps of:
- feeding a first feed stream comprising resid to a combined feed line upstream of a reactorfeeding a separate second stream comprising recycled substantially deasphalted solvent-extracted resins to said combined feed line upstream of said reactormixing said first stream comprising said resid and said second stream comprising said recycled deasphalted solvent-extracted resins in said combined feed line;
feeding said mixed first stream comprising said resid and said second stream comprising said recycled deasphalted resin to said reactor;
feeding hydrotreating catalyst to said reactor;
injecting hydrogen-rich gases into said reactor; and
hydrotreating said mixed first stream comprising said resid and said second stream comprising said recycled deasphalted solvent-extracted resins in said reactor by contacting said mixed first stream comprising said resid and said second stream comprising said recycled deasphalted solvent-extracted resins with said hydrogen-rich gases in the presence of said hydrotreating catalyst under hydrotreating conditions to produce hydrotreated oil;
fractionating said hydrotreated oil in a fractionator to produce gas oil and resid bottoms;
substantially separating said resid bottoms by solvent extraction into one stream comprising asphaltenes and said second stream comprising said substantially deasphalted solvent-extracted resins; and
recycling said second stream comprising said recycled deasphalted solvent-extracted resins to said combined feed line upstream of said reactor.
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Abstract
A hydrotreating process if provided in which resid and resins are hydrotreated with hydrogen-rich gases in the presence of a hydrotreating catalyst in an ebullated bed reactor.
90 Citations
20 Claims
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1. A hydrotreating process, comprising the steps of:
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feeding a first feed stream comprising resid to a combined feed line upstream of a reactor feeding a separate second stream comprising recycled substantially deasphalted solvent-extracted resins to said combined feed line upstream of said reactor mixing said first stream comprising said resid and said second stream comprising said recycled deasphalted solvent-extracted resins in said combined feed line; feeding said mixed first stream comprising said resid and said second stream comprising said recycled deasphalted resin to said reactor; feeding hydrotreating catalyst to said reactor; injecting hydrogen-rich gases into said reactor; and hydrotreating said mixed first stream comprising said resid and said second stream comprising said recycled deasphalted solvent-extracted resins in said reactor by contacting said mixed first stream comprising said resid and said second stream comprising said recycled deasphalted solvent-extracted resins with said hydrogen-rich gases in the presence of said hydrotreating catalyst under hydrotreating conditions to produce hydrotreated oil; fractionating said hydrotreated oil in a fractionator to produce gas oil and resid bottoms; substantially separating said resid bottoms by solvent extraction into one stream comprising asphaltenes and said second stream comprising said substantially deasphalted solvent-extracted resins; and recycling said second stream comprising said recycled deasphalted solvent-extracted resins to said combined feed line upstream of said reactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A hydrotreating process, comprising the steps of:
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substantially desalting crude oil; heating said desalted crude oil in a pipestill furnace; pumping said heated crude oil to a primary distillation tower; separating said heated crude oil in said primary distillation tower into streams of naphtha, kerosene, primary gas oil, and primary reduced crude oil; pumping said primary reduced crude oil to a pipestill vacuum tower; separating said primary gas oil in said pipestill vacuum tower into streams of wet gas, heavy gas oil, and vacuum reduced crude oil providing resid oil; feeding a resid oil feed comprising solvent-extracted resins and said resid oil from said pipestill vacuum tower to a resid hydrotreating unit comprising a series of three ebullated bed reactors; injecting hydrogen-rich gases into said ebullated bed reactors; conveying resid hydrotreating catalysts to said ebullated bed reactors; ebullating said feed comprising said solvent-extracted resins and said resid oil with said hydrogen-rich gases in the presence of said resid hydrotreating catalyst in said ebullated bed reactors under hydrotreating conditions to produce upgraded hydrotreated resid oil; separating at least a portion of said hydrotreated resid oil in an atmospheric tower into atmospheric streams of distillate, atmospheric gas oil, and atmospheric tower bottoms comprising atmospheric resid oil; separating said atmospheric resid oil in a resid vacuum tower into vacuum streams of vacuum gas oil and vacuum tower bottoms comprising vacuum resid oil; conveying and feeding a substantial portion of said vacuum tower bottoms from said resid vacuum tower to a multistage solvent extraction unit; feeding a solvent to said multistage solvent extraction unit, said solvent comprising a member selected from the group consisting of butane and pentane; substantially deasphalting and solvent-extracting said vacuum tower bottoms with said solvent in said multistage solvent extraction unit to substantially separate said vacuum tower bottoms into streams of substantially deasphalted solvent-extracted oil, substantially deasphalted solvent-extracted resins, and substantially deresined solvent-extracted asphaltenes; recovering said solvent under supercritical conditions and recycling said solvent to said solvent extraction unit; transporting at least some of said solvent-extracted asphaltenes for use as solid fuel; and conveying said solvent-extracted resins from said solvent extraction unit to said resid hydrotreating unit as part of said resid oil feed. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A hydrotreating process comprising the steps of:
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feeding a first stream comprising resid to a reactor; feeding a second stream comprising recycled substantially deasphalted resins to said reactor; feeding hydrotreating catalyst to said reactor; injecting hydrogen-rich gases into said reactor; hydrotreating said first stream comprising resid and said second stream comprising recycled resins with said hydrogen-rich gases in the presence of said hydrotreating catalyst under hydrotreating conditions to produce hydrotreated oil; fractionating said hydrotreated oil in at least one fractionator selected from the group consisting of an atmospheric tower and a vacuum tower to produce gas oil and resid bottoms; substantially separating said resid bottoms into one stream comprising asphaltenes and said second stream comprising said substantially deasphalted resins; and recycling said second stream comprising said recycled deasphalted resins to said reactor. - View Dependent Claims (20)
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Specification