# US 2013/0158312 A1 · Integrated hydrogenation/dehydrogenation reactor in a platforming process > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0158312 A1 - Document ID: US20130158312A1 - Status: Published application - Kind: A1 - Application number: 13/327,185 - Filed: 2011-12-15 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: Uop LLC - Inventors: Manuela Serban; Kurt M. Vanden Bussche; Mark D. Moser; David A. Wegerer - Web page: https://patentgrep.com/patent/US20130158312A1 ## CPC - C10G 35/06: characterised by the catalyst used - C10G 2400/30: Aromatics - 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 A process for reforming a hydrocarbon stream is presented. The process involves splitting a naphtha feedstream to at least two feedstreams and partially processing each feedstream in separate reactors. The processing includes passing the light stream to a combination hydrogenation/dehydrogenation reactor. The process reduces the energy by reducing the endothermic properties of intermediate reformed process streams. ## Claims ### Claim 1 A process for producing aromatic compounds from a hydrocarbon feedstream, comprising: passing the hydrocarbon feedstream to a fractionation unit to generate an overhead stream comprising C7 and lighter hydrocarbons, and a bottoms stream comprising C8 and heavier hydrocarbons; passing the overhead stream to a hydrogenation/dehydrogenation reactor system thereby generating a first stream having C6 and C7 aromatics with low olefin content; passing the bottoms stream to a bottoms reforming unit, to generate bottoms reformate comprising aromatics; passing the first stream and the bottoms reformate to a substantially isothermal reactor system, thereby generating an aromatics stream; and passing the aromatics stream to a reformate splitter, to generate a reformate overhead stream comprising C7 and lighter aromatics and C7 and lighter paraffins, and a bottoms stream comprising C8 and higher hydrocarbons. ### Claim 2 (depends on 1) The process of claim 1 further comprising passing the reformate overhead stream to an aromatics recovery unit to generate an aromatics product stream comprising benzene and toluene, and a raffinate stream. ### Claim 3 (depends on 2) The process of claim 2 further comprising passing the raffinate stream to the hydrogenation/dehydrogenation reactor system. ### Claim 4 (depends on 2) The process of claim 2 further comprising passing the raffinate stream to the substantially isothermal reactor system. ### Claim 5 (depends on 1) The process of claim 1 wherein the hydrocarbon feedstream is a full boiling range naphtha. ### Claim 6 (depends on 1) The process of claim 1 wherein the hydrogenation/dehydrogenation reactor system uses a catalyst that has a metal function to hydrogenate olefins and to dehydrogenate naphthenes. ### Claim 7 (depends on 1) The process of claim 1 wherein the isothermal reactor system comprises a plurality of reactors with inter-reactor heaters. ### Claim 8 (depends on 1) The process of claim 1 wherein the hydrogenation/dehydrogenation reactor system is operated at a temperature between 420° C. and 460° C. ### Claim 9 (depends on 8) The process of claim 8 wherein the hydrogenation/dehydrogenation reactor system is operated at a temperature between 425° C. and 450° C. ### Claim 10 (depends on 1) The process of claim 1 wherein the hydrogenation/dehydrogenation system comprises a metal only catalyst on an inert support material. ### Claim 11 (depends on 1) The process of claim 1 further comprising the hydrocarbon feedstream to a hydrotreater before passing the hydrocarbon feedstream to the fractionation unit. ### Claim 12 A process for producing aromatic compounds from a hydrocarbon feedstream, comprising: passing the hydrocarbon feedstream to a hydrotreater to generate a treated hydrocarbon stream; passing the treated hydrocarbon feedstream to a fractionation unit to generate an overhead stream comprising C7 and lighter hydrocarbons, and a bottoms stream comprising C8 and heavier hydrocarbons; passing the overhead stream to a hydrogenation/dehydrogenation reactor system having a metal only catalyst to generate a first stream having C6 and C7 aromatics with low olefin content; passing the bottoms stream to a bottoms reforming unit, to generate bottoms reformate comprising aromatics; passing the first stream and the bottoms reformate to a substantially isothermal reactor system, thereby generating an aromatics stream; and passing the aromatics stream to a reformate splitter, to generate a reformate overhead stream comprising C7 and lighter aromatics and C7 and lighter paraffins, and a bottoms stream comprising C8 and higher hydrocarbons. ### Claim 13 (depends on 12) The process of claim 12 further comprising passing the reformate overhead stream to an aromatics recovery unit to generate an aromatics product stream comprising benzene and toluene, and a raffinate stream. ### Claim 14 (depends on 12) The process of claim 12 further comprising passing a portion of the raffinate stream to the isothermal reactor system. ### Claim 15 (depends on 12) The process of claim 12 further comprising passing a portion of the raffinate stream to the hydrogenation/dehydrogenation reactor. ### Claim 16 (depends on 15) The process of claim 15 wherein the raffinate stream comprises more than 10 wt % olefins. ### Claim 17 (depends on 12) The process of claim 12 wherein the isothermal reactor system is operated at a temperature greater than 540° C. ### Claim 18 (depends on 12) The process of claim 12 wherein the hydrogenation/dehydrogenation catalyst has no acid function. ### Claim 19 (depends on 12) The process of claim 12 wherein the hydrogenation/dehydrogenation reactor is a fixed bed reactor.