# US 11,028,326 B2 · Process for hydrotreating a residue stream with hydrogen recycle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,326 B2 - Document ID: US11028326B2 - Status: Granted - Kind: B2 - Application number: 15/884,219 - Filed: 2018-01-30 - Published: 2019-08-01 - Granted: 2021-06-08 - Earliest claimed: 2018-01-30 - Assignees: Uop LLC - Applicants: Uop LLC - Inventors: Ping Sun - Web page: https://patentgrep.com/patent/US11028326B2 ## CPC - C10B 57/005: {After-treatment of coke, e.g. calcination desulfurization} - B01D 3/06: Flash distillation - B01D 3/143: {by two or more of a fractionation, separation or rectification step} - B01D 53/02: by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} - B01D 53/1468: {Removing hydrogen sulfide} - C10G 7/00: Distillation of hydrocarbon oils - C10G 65/04: including only refining steps - B01D 3/4205: {Reflux ratio control splitter} - C10G 2300/1077: Vacuum residues - C10G 2300/202: Heteroatoms content, i.e. S, N, O, P - C10G 2300/206: Asphaltenes - C10G 2300/42: Hydrogen of special source or of special composition - C10G 2300/708: Coking aspect, coke content and composition of deposits - C10G 2400/16: Residues - C10B: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES ## Abstract The subject process enhances catalytic activity for demetallization and desulfurization of a residue feed stream by splitting a recycle hydrogen stream and feeding each of the split hydrogen streams to the first and second stages of demetallation and desulfurization, respectively, with interstage separation. The recycle hydrogen stream may first undergo scrubbing to remove acid gases and compression before recycle. The recycle hydrogen stream is taken from a first hot vapor stream from the first hydrotreating unit and a second hot vapor stream from the second hydrotreating unit. ## Claims ### Claim 1 A process for hydrotreating a hydrocarbon resid stream comprising: adding a first stage hydrogen stream and a water stream to a resid stream; hydrotreating said resid stream over a demetallation catalyst to demetallize said resid stream in the presence of the first stage hydrogen stream to provide a demetallized resid stream reduced in metals and sulfur concentration, wherein said demetallation catalyst has a pore size distribution with at least about 25% of the pores on said demetallation catalyst being characterized as large pores; separating said demetallized resid stream into a first stage hot vapor stream and a first stage hot liquid stream with a smaller concentration of hydrogen sulfide than in the demetallized resid stream; adding a second stage hydrogen stream to said first stage liquid stream; and hydrotreating said first stage liquid stream over a desulfurization catalyst and the second stage hydrogen stream to provide a desulfurized resid stream; separating said desulfurized resid stream into a second stage hot vapor stream and a second stage hot liquid stream with a smaller concentration of hydrogen sulfide than in the desulfurized resid stream; separating said first stage hot vapor stream and said second stage hot vapor stream to provide a cold vapor stream and a cold liquid stream; compressing said cold vapor stream to provide a recycle hydrogen stream; and splitting said recycle hydrogen stream into said first stage hydrogen stream and said second stage hydrogen stream. ### Claim 2 (depends on 1) The process of claim 1 wherein separating said first stage hot vapor stream and said second stage hot vapor stream to provide a cold vapor stream and a cold liquid stream further comprises separating said first stage hot vapor stream into a first stage cold vapor stream and a first stage cold liquid stream and separating said second stage hot vapor stream into a second stage cold vapor stream and a second stage cold liquid stream and combining said first stage cold vapor stream and said second stage cold vapor stream to provide said cold vapor stream. ### Claim 3 (depends on 1) The process of claim 1 wherein separating said first stage hot vapor stream and said second stage hot vapor stream to provide a cold vapor stream and a cold liquid stream further comprises combining said first stage hot vapor stream and said second stage hot vapor stream, separating said first stage hot vapor stream and said second stage hot vapor stream together into said cold vapor stream and said cold liquid stream. ### Claim 4 (depends on 1) The process of claim 1 further comprising absorbing hydrogen sulfide from said cold vapor stream into a solvent to provide a scrubbed cold vapor stream and compressing said scrubbed cold vapor stream. ### Claim 5 (depends on 4) The process of claim 4 further comprising splitting said scrubbed cold vapor stream into a purge stream and a recycle cold vapor stream and compressing said recycle cold vapor stream. ### Claim 6 (depends on 5) The process of claim 5 further comprising contacting said purge stream on one side of a membrane and transporting a permeate gas from said membrane to a make-up gas compressor. ### Claim 7 (depends on 1) The process of claim 1 wherein said resid stream comprise an asphaltic sulfur concentration of at least 10 wt % of total sulfur. ### Claim 8 (depends on 1) The process of claim 1 further comprising fractionating said second stage hot liquid stream. ### Claim 9 (depends on 8) The process of claim 8 further comprising fractionating said cold liquid stream. ### Claim 10 (depends on 8) The process of claim 8 further comprising flashing said second stage hot liquid stream to provide a hot flash vapor stream and a hot flash liquid stream and fractionating said hot flash liquid stream. ### Claim 11 (depends on 9) The process of claim 9 further comprising flashing said cold liquid stream into a cold flash liquid stream and a cold flash vapor stream and fractionating said cold flash liquid stream. ### Claim 12 A process for hydrotreating a hydrocarbon resid stream comprising: adding a first stage hydrogen stream and a water stream to a resid stream; hydrotreating said resid stream over a demetallation catalyst to demetallize said resid stream in the presence of the first stage hydrogen stream to provide a demetallized resid stream reduced in metals and sulfur concentration; separating said demetallized resid stream into a first stage hot vapor stream and a first stage hot liquid stream with a smaller concentration of hydrogen sulfide than in the demetallized resid stream; adding a second stage hydrogen stream to said first stage liquid stream; and hydrotreating said first stage liquid stream over a desulfurization catalyst and the second stage hydrogen stream to provide a desulfurized resid stream; separating said desulfurized resid stream into a second stage hot vapor stream and a second stage hot liquid stream with a smaller concentration of hydrogen sulfide than in the desulfurized resid stream; separating said first stage hot vapor stream and said second stage hot vapor stream to provide a cold vapor stream and a cold liquid stream; compressing said cold vapor stream to provide a recycle hydrogen stream; and taking said first stage hydrogen stream from said recycle hydrogen stream and taking said second stage hydrogen stream from said recycle hydrogen stream. ### Claim 13 (depends on 12) The process of claim 12 wherein separating said first stage hot vapor stream and said second stage hot vapor stream to provide a cold vapor stream and a cold liquid stream further comprises separating said first stage hot vapor stream into a first stage cold vapor stream and a first stage cold liquid stream and separating said second stage hot vapor stream into a second stage cold vapor stream and a second stage cold liquid stream and combining said first stage cold vapor stream and said second stage cold vapor stream to provide said cold vapor stream. ### Claim 14 (depends on 12) The process of claim 12 wherein separating said first stage hot vapor stream and said second stage hot vapor stream to provide a cold vapor stream and a cold liquid stream further comprises combining said first stage hot vapor stream and said second stage hot vapor stream, separating said first stage hot vapor stream and said second stage hot vapor stream together into said cold vapor stream and said cold liquid stream. ### Claim 15 (depends on 12) The process of claim 12 further comprising absorbing hydrogen sulfide from said cold vapor stream into a solvent to provide a scrubbed cold vapor stream and taking said first stage hydrogen stream from said scrubbed cold vapor stream and taking said second stage hydrogen stream from said scrubbed cold vapor stream. ### Claim 16 (depends on 12) The process of claim 12 wherein said resid stream comprise an asphaltic sulfur concentration of at least 10 wt % of total sulfur. ### Claim 17 A process for hydrotreating a hydrocarbon resid stream comprising: hydrotreating said resid stream over a demetallation catalyst to demetallize said resid stream in the presence of a first stage hydrogen stream to provide a demetallized resid stream reduced in metals and sulfur concentration, wherein said demetallation catalyst has a bimodal pore size distribution with at least about 25% of the pores on said demetallation catalyst being characterized as large pores; separating said demetallized resid stream into a first stage hot vapor stream and a first stage hot liquid stream with a smaller concentration of hydrogen sulfide than in the demetallized resid stream; hydrotreating said first stage liquid stream over a desulfurization catalyst and a second stage hydrogen stream to provide a desulfurized resid stream, wherein said desulfurization catalyst has a monomodal pore size distribution; separating said desulfurized resid stream into a second stage hot vapor stream and a second stage hot liquid stream with a smaller concentration of hydrogen sulfide than in the desulfurized resid stream; combining said first stage hot vapor stream and said second stage hot vapor stream, separating said first stage hot vapor stream and said second stage hot vapor stream together into a cold vapor stream and said cold liquid stream; and taking said first stage hydrogen stream from said cold vapor stream and taking said second stage hydrogen stream from said cold vapor stream. ### Claim 18 (depends on 17) The process of claim 17 further comprising absorbing hydrogen sulfide from said cold vapor stream into a solvent to provide a scrubbed cold vapor stream and taking said first stage hydrogen stream from said scrubbed cold vapor stream and taking said second stage hydrogen stream from said scrubbed cold vapor stream. ### Claim 19 (depends on 17) The process of claim 17 wherein said resid stream comprise an asphaltic sulfur concentration of at least 10 wt % of total sulfur. ### Claim 20 (depends on 17) The process of claim 17 further comprising fractionating said second stage hot liquid stream.