# US 11,299,442 B2 · Process for producing acetylene and ethylene > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,442 B2 - Document ID: US11299442B2 - Status: Granted - Kind: B2 - Application number: 17/218,394 - Filed: 2021-03-31 - Published: 2021-09-30 - Granted: 2022-04-12 - Earliest claimed: 2020-03-31 - Assignees: Uop LLC - Applicants: Uop LLC - Inventors: Nathan Siedler; Charles Luebke; David Wegerer; Parag Jain - Web page: https://patentgrep.com/patent/US11299442B2 ## CPC - B01D 53/1475: {Removing carbon dioxide} - C07C 1/12: from carbon dioxide with hydrogen - B01D 53/047: Pressure swing adsorption - C07C 1/0485: {Set-up of reactors or accessories; Multi-step processes} - C07C 2/76: by condensation of hydrocarbons with partial elimination of hydrogen - C07C 9/04: Methane (production by treatment of sewage C02F11/04; natural gas, synthetic natural gas C10L3/06) - C07C 11/04: Ethene - C07C 11/24: Acetylene (production of acetylene gas by wet methods C10H) - B01D 2252/204: Amines - B01D 2256/245: Methane - B01D 2257/108: Hydrogen - B01D 2257/504: Carbon dioxide - C07C 2523/755: Nickel - Y02C 20/40: of CO2 - Y02P 20/129: Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines - Y02P 20/151: Reduction of greenhouse gas [GHG] emissions, e.g. CO2 - Y02P 20/50: Improvements relating to the production of bulk chemicals - Y02P 30/40: Ethylene production - 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) - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS - Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A process for producing acetylene, ethylene, or both is disclosed. The process includes combusting a fuel stream to produce a combustion gas effluent stream and pyrolyzing a feed stream in a pyrolysis zone in the presence of the combustion gas effluent stream to produce a pyrolysis zone effluent stream which is further quenched and compressed. The compressed quenched stream is separated in a solvent separation column to produce a net gas stream comprising hydrogen, methane, and at least one carbon oxide and a product stream. A portion of the carbon oxide of the net gas stream is converted into methane in a methanation reactor and a reactor effluent stream is sent to an amine scrubber where carbon dioxide is removed and a methane containing stream is generated as an effluent. The methane containing stream is then recycled to the pyrolysis zone of the supersonic reactor. ## Claims ### Claim 1 A process for producing acetylene, ethylene, or both, the process comprising: combusting a fuel stream in presence of oxygen in a combustion zone of a supersonic reactor to produce a combustion gas effluent stream; pyrolyzing a feed stream in a pyrolysis zone of the supersonic reactor in the presence of the combustion gas effluent stream to produce a pyrolysis zone effluent stream; quenching the pyrolysis zone effluent stream to produce a quenched stream; compressing the quenched stream to form a compressed quenched stream; separating the compressed quenched stream in a solvent separation column into a product stream and a net gas stream, the net gas stream comprising hydrogen, methane, and at least one carbon oxide; converting a portion of the carbon oxide of the net gas stream in a methanation reactor, into methane and producing a methanation reactor effluent; removing a carbon dioxide stream from the methanation reactor effluent in an amine scrubber and generating a methane containing stream; and recycling the methane containing stream to the supersonic reactor, wherein a mole ratio of oxygen to fuel and feed in the supersonic reactor varies between 0.223-0.26. ### Claim 2 (depends on 1) The process of claim 1, wherein the fuel stream supplied to the combustion zone comprises methane or pipeline natural gas. ### Claim 3 (depends on 1) The process of claim 1, wherein the feed stream to the pyrolysis zone of the supersonic reactor comprises a combined methane feed stream. ### Claim 4 (depends on 1) The process of claim 1, further comprising passing a fresh methane containing feed stream to the methane containing stream of the amine scrubber. ### Claim 5 (depends on 1) The process of claim 1, further comprising: hydrogenating the product stream from the solvent separation column in a hydrogenation reactor to generate a hydrogenated product stream; compressing the hydrogenated product stream in a compressor to form a compressed hydrogenated product stream; separating the compressed hydrogenated product stream in a product fractionation column to provide a C2 and/or C3+ hydrocarbon stream and a hydrogen stream; and recycling the hydrogen stream from the product fractionation column to the hydrogenation reactor. ### Claim 6 (depends on 5) The process of claim 5, further comprising drying the compressed product stream in a dryer prior to separating the compressed hydrogenated product stream to the product fractionation column. ### Claim 7 (depends on 5) The process of claim 5, further comprising: compressing a portion of the net gas stream from the solvent separation column to form a compressed net gas stream; adsorbing the compressed net gas stream in a pressure swing adsorption zone to recover an adsorbed hydrogen stream; and recycling the adsorbed hydrogen stream to the hydrogenation reactor. ### Claim 8 A process for converting a carbon oxide into methane in an acetylene or ethylene production process, the process comprising: combusting a fuel stream in a combustion zone of a supersonic reactor to produce a combustion gas effluent stream; pyrolyzing a feed stream in a pyrolysis zone of the supersonic reactor in the presence of the combustion gas effluent stream to produce a pyrolysis zone effluent stream; quenching the pyrolysis zone effluent stream to produce a supersonic reactor effluent; separating the supersonic reactor effluent from the supersonic reactor in a solvent separation column to provide a product stream comprising acetylene, or ethylene, or both and a net gas stream comprising hydrogen, methane and at least one carbon oxide; sending a first portion of the net gas stream to a pressure swing adsorption zone to recover hydrogen to produce a hydrogen stream; sending a second portion of the net gas stream to a methanation reactor to convert at least one carbon oxide of the second portion of the net gas stream into methane and producing a methanation reactor effluent; removing a carbon dioxide stream from the methanation reactor effluent in an amine scrubber generating a methane containing stream; and recycling the methane containing stream to the supersonic reactor, wherein a mole ratio of oxygen to fuel and feed in the supersonic reactor varies between 0.223-0.26. ### Claim 9 (depends on 8) The process of claim 8, further comprising: hydrogenating the product stream in a hydrogenation reactor to generate a hydrogenated product stream; compressing the hydrogenated product stream in a compressor to form a compressed hydrogenated product stream; separating the compressed hydrogenated product stream in a product fractionation column to provide a C2 and/or C3+ hydrocarbon stream and a hydrogen stream; and recycling the hydrogen stream from the product fractionation column to the hydrogenation reactor. ### Claim 10 (depends on 9) The process of claim 9, further comprising: compressing the first portion of the net gas stream in a compressor prior to sending the net gas stream to the pressure swing adsorption zone; and recycling the hydrogen in the hydrogen stream to the hydrogenation reactor. ### Claim 11 (depends on 8) The process of claim 8, further comprising compressing the supersonic reactor effluent in a compressor located upstream of the solvent separation column. ### Claim 12 (depends on 8) The process of claim 8, further comprising recycling the methane containing stream from the amine scrubber to the supersonic reactor. ### Claim 13 (depends on 8) The process of claim 8, further comprising introducing a fresh methane containing stream to the methane containing stream of the amine scrubber.