# US 9,752,085 B2 · Process and apparatus for producing diesel from a hydrocarbon stream > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,085 B2 - Document ID: US9752085B2 - Status: Granted - Kind: B2 - Application number: 13/922,478 - Filed: 2013-06-20 - Published: 2014-12-25 - Granted: 2017-09-05 - Earliest claimed: 2013-06-20 - Assignees: Uop LLC - Applicants: Uop LLC - Inventors: Paul R. Zimmerman; Peter Kokayeff; Michael R. Smith - Web page: https://patentgrep.com/patent/US9752085B2 ## CPC - C10G 65/12: including cracking steps and other hydrotreatment steps - C10L 1/08: for compression ignition - C10G 2400/04: Diesel oil - 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 - C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS ## Abstract A process and apparatus are disclosed for hydrotreating a hydrocarbon feed in a hydrotreating unit and hydrocracking a liquid hydrotreating effluent stream in a hydrocracking unit. A hot separator separates the diesel in a liquid hot hydrotreating effluent stream that serves as feed to the hydrocracking unit. Low sulfur diesel product can be saturated to further upgrade its cetane rating. ## Claims ### Claim 1 A process for producing diesel from a hydrocarbon stream comprising: hydrotreating a hydrocarbon feed stream over hydrotreating catalyst in the presence of hydrogen; separating a hydrotreating effluent stream into a vaporous hot hydrotreating effluent stream and a liquid hot hydrotreating effluent stream; obtaining a greater proportion of diesel from said hydrotreating effluent stream in said liquid hot hydrotreating effluent stream than in said vaporous hot hydrotreating effluent stream; separating said vaporous hot hydrotreating effluent stream into a vaporous cold hydrotreating effluent stream and a liquid cold hydrotreating effluent stream; fractionating said liquid cold hydrotreating effluent stream; and hydrocracking said liquid hot hydrotreating effluent stream. ### Claim 2 (depends on 1) The process of claim 1 further comprising hydrotreating said hydrocarbon feed at a pressure within about 500 kPa of hydrocracking said liquid hot hydrotreating effluent stream. ### Claim 3 (depends on 1) The process of claim 1 further comprising adding fresh hydrogen to the hydrocracking reactor. ### Claim 4 (depends on 1) The process of claim 1 further comprising separating said hydrocracking effluent with said vaporous hot hydrotreating effluent stream in a cold separator. ### Claim 5 (depends on 1) The process of claim 1 further comprising separating said hydrocracking effluent stream into a vaporous hydrocracking effluent stream and a liquid hydrocracking effluent stream and mixing said vaporous hydrocracking effluent stream with said vaporous cold hydrotreating effluent stream and mixing said liquid hydrocracking effluent stream with said liquid cold hydrotreating effluent stream. ### Claim 6 (depends on 5) The process of claim 5 further comprising fractionating said liquid hydrocracking effluent stream in said fractionation column. ### Claim 7 (depends on 6) The process of claim 6 further comprising producing a diesel stream from said fractionation column. ### Claim 8 (depends on 7) The process of claim 7 further comprising saturating said diesel stream to increase its cetane rating. ### Claim 9 (depends on 8) The process of claim 8 further comprising separating a saturation effluent stream into a vaporous warm saturation effluent stream and a liquid warm saturation effluent stream. ### Claim 10 (depends on 9) The process of claim 9 further comprising mixing said vaporous warm saturation stream with said hydrocracking effluent stream. ### Claim 11 (depends on 8) The process of claim 8 further comprising separating said liquid warm saturation effluent stream to provide a high cetane, low sulfur diesel stream. ### Claim 12 A process for producing diesel from a hydrocarbon stream comprising: hydrotreating a hydrocarbon stream over hydrotreating catalyst in the presence of hydrogen; separating a hydrotreating effluent stream into a vaporous hot hydrotreating effluent stream and a liquid hot hydrotreating effluent stream; obtaining a greater proportion of diesel from said hydrotreating effluent stream in said liquid hot hydrotreating effluent stream than in said vaporous hot hydrotreating effluent stream; separating said vaporous hot hydrotreating effluent stream into a vaporous cold hydrotreating effluent stream and a liquid cold hydrotreating effluent stream; fractionating said liquid cold hydrotreating effluent stream to produce a diesel stream; hydrocracking said liquid hot hydrotreating effluent stream; and saturating said diesel stream. ### Claim 13 (depends on 12) The process of claim 12 further comprising hydrotreating a hydrocarbon feed and a hydrocarbon co-feed together. ### Claim 14 (depends on 12) The process of claim 12 further comprising obtaining a greater proportion of diesel from said hydrotreating effluent stream in said liquid hot hydrotreating effluent stream than in said vaporous hot hydrotreating effluent stream. ### Claim 15 (depends on 12) The process of claim 12 further comprising hydrotreating said hydrocarbon feed at a pressure within about 500 kPa of hydrocracking said liquid hot hydrotreating effluent stream. ### Claim 16 (depends on 12) The process of claim 12 further comprising separating said saturation effluent stream into a vaporous warm saturation effluent stream and a liquid warm saturation effluent stream and mixing said vaporous warm saturation stream with a hydrocracking effluent stream. ### Claim 17 A process for producing diesel from a hydrocarbon stream comprising: hydrotreating a hydrocarbon stream over hydrotreating catalyst in the presence of hydrogen; separating a hydrotreating effluent stream into a vaporous hot hydrotreating effluent stream and a liquid hot hydrotreating effluent stream; obtaining a greater proportion of diesel from said hydrotreating effluent stream in said liquid hot hydrotreating effluent stream than in said vaporous hot hydrotreating effluent stream; separating said vaporous hot hydrotreating effluent stream into a vaporous cold hydrotreating effluent stream and a liquid cold hydrotreating effluent stream; fractionating said liquid cold hydrotreating effluent stream; and hydrocracking said liquid hot hydrotreating effluent stream at a pressure within about 500 kPa of a pressure at which said hydrocarbon stream is hydrotreated. ### Claim 18 (depends on 1) The process of claim 1 further comprising hydrotreating a hydrocarbon feed and a hydrocarbon co-feed together.