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71.发明公开公开(公告)号：US20240307841A1
公开(公告)日：2024-09-19
申请号：US18573195
申请日：2022-06-24
Applicant: Dow Global Technologies LLC
Inventor： Matthew T. Pretz , Donald F. Shaw , Richard E. Walter , Albert Meza , Fermin Sandoval , Liwei Li
CPC classification number: B01J8/44 , B01J8/1881 , B01J2208/00884 , B01J2208/00902 , B01J2208/00938
Abstract: According to one or more embodiments, a chemical processing vessel may include side walls, a floor, a catalyst outlet through the floor, and a plate grid distributor for distributing a fluid. The plate may include a plurality of apertures extending through the thickness of the plate and a central opening. The plate may include a catalyst transport passage extending from the central opening to the catalyst outlet. The catalyst transport passage may have a greater cross section area at the central opening of the plate than at the catalyst outlet. According to one or more embodiments, a method of operating a chemical processing vessel passing a fluid into the chemical processing vessel, directing the fluid through a plate grid distributor, and passing catalyst from above the plate, through the catalyst transport passage, and out of the chemical processing vessel through the catalyst outlet.
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公开(公告)号：US20240100510A1
公开(公告)日：2024-03-28
申请号：US18257909
申请日：2021-12-15
Applicant: Dow Global Technologies LLC
Inventor： Lin Luo , Yang Yang , Matthew T. Pretz
CPC classification number: B01J23/62 , B01J35/40 , C07C5/325 , C07C2523/08 , C07C2523/42 , C07C2523/62
Abstract: According to one or more embodiments of the present disclosure, a fluidization promoter useful for dehydrogenation includes from 0.1 wt. % to 10 wt. % gallium, from 5 ppm to 500 ppm platinum, less than 5 wt. % alkali metal or alkaline earth metal, and a support material. A median particle size of the fluidization promoter is from 20 μm to 50 μm. Catalyst systems useful for dehydrogenation and methods for producing olefins using the same are also disclosed.
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公开(公告)号：US20240033723A1
公开(公告)日：2024-02-01
申请号：US18257328
申请日：2021-12-14
Applicant: Dow Global Technologies LLC
Abstract: According to one or more embodiments, particulate solids may be regenerated in a particulate solid treatment vessel. The particulate solid treatment vessel may be connected to a riser. The riser may extend through a riser port of an outer shell of a particulate solid separation section such that the riser may comprise an interior riser segment and an exterior riser segment. The particulate solid separation section may include a gas outlet port, a riser port, and a particulate solid collection area. The riser port may be positioned on a sidewall of the outer shell such that it is not located on a central vertical axis of the particulate solid separation section. The particulate solids may be separated from gasses in the particulate solid separation section.
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公开(公告)号：US20240024837A1
公开(公告)日：2024-01-25
申请号：US18257364
申请日：2021-12-14
Applicant: Dow Global Technologies LLC
CPC classification number: B01J8/1872 , B01J8/26
Abstract: According to one or more embodiments of the present disclosure, a riser may include a lower riser portion, where the lower riser portion terminates at an upper end of the vertical riser segment, and an upper riser portion including a lower end, where the lower end of the upper riser portion may be positioned around the upper end of the vertical riser segment of the lower riser portion. The riser may also include a first guide and a second guide each positioned on opposite sides of the interior of the lower end of the upper riser portion. The vertical riser segment of the lower riser portion may be guided in a direction substantially parallel with the outer surface of the first guide and the outer surface of the second guide when the lower riser portion expands or contracts due to changes in temperature.
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公开(公告)号：US20230372889A1
公开(公告)日：2023-11-23
申请号：US18247141
申请日：2021-09-28
Applicant: Dow Global Technologies LLC
Inventor： Matthew T. Pretz , Donald F. Shaw , Richard Walter , Albert Meza , Fermin Sandoval , Quan Yuan , Liwei Li , Pritish Kamat
CPC classification number: B01J8/1818 , B01J8/1872 , B01J4/004 , F23C10/22 , B01J2208/00938 , B01J2208/00911
Abstract: A fluidized bed processing system include a vessel having a vessel wall and a plurality of chemical feed distributors coupled to the vessel wall and extending into an internal volume of the vessel. Each of the chemical feed distributors includes a distributor body forming a chemical feed flow path and a plurality of chemical feed outlets. The fluidized bed processing system further includes at least one intermediate beam having at plurality of slots spaced apart along a beam length. That intermediate beam is coupled to the vessel wall at both ends, each chemical feed distributor passes through one slot of the intermediate beam, and the intermediate beam provides vertical support for each of the plurality of chemical feed distributors. The fluidized bed processing system can include lateral guides. The intermediate beams and lateral guides support the chemical feed distributors vertically and laterally.
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Patent Agency Ranking
公开(公告)号：US11773038B2
公开(公告)日：2023-10-03
申请号：US17621919
申请日：2020-06-08
Applicant: Dow Global Technologies LLC
Inventor： Lin Luo , Hangyao Wang , Yu Liu , Matthew T. Pretz , Andrzej Malek
CPC classification number: C07C5/3337 , B01J23/62 , C07C4/04 , C07C5/333 , C07C7/167 , C07C2523/62
Abstract: A method for operating an acetylene hydrogenation unit in an integrated steam cracking-fluidized catalytic dehydrogenation (FCDh) system may include separating a cracked gas from a steam cracking system and an FCDh effluent from an FCDh system into a hydrogenation feed and an acetylene-depleted stream, the hydrogenation feed comprising at least hydrogen, CO, and acetylene. During normal operating conditions, at least 20% of the CO in the hydrogenation feed is from the cracked gas. The method may include contacting the hydrogenation feed with an acetylene hydrogenation catalyst to hydrogenate at least a portion of the acetylene in the hydrogenation feed to produce a hydrogenated effluent. The steam cracking is operated under conditions that increase CO production such that a concentration of CO in the cracked gas is great enough that when a flowrate of the FCDh effluent is zero, a CO concentration in the hydrogenation feed is at least 100 ppmv.
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77.发明申请公开(公告)号：US20220340505A1
公开(公告)日：2022-10-27
申请号：US17860357
申请日：2022-07-08
Applicant: Dow Global Technologies LLC
Inventor： Matthew T. Pretz , Mark W. Stewart , Lin Luo , Hangyao Wang
IPC: C07C5/333 , B01J8/00 , B01J8/18 , B01J8/24 , B01J21/12 , B01J23/62 , B01J23/96 , B01J38/02 , B01J38/12
Abstract: A method for processing a chemical stream includes contacting a feed stream with a catalyst in a reactor portion of a reactor system that includes a reactor portion and a catalyst processing portion. The catalyst includes platinum, gallium, or both and contacting the feed stream with the catalyst causes a reaction which forms an effluent stream. The method includes separating the effluent stream from the catalyst, passing the catalyst to the catalyst processing portion, and processing the catalyst in the catalyst processing portion. Processing the catalyst includes passing the catalyst to a combustor, combusting a supplemental fuel in the combustor to heat the catalyst, treating the heated catalyst with an oxygen-containing gas to produce a reactivated catalyst, and passing the reactivated catalyst from the catalyst processing portion to the reactor portion. The supplemental fuel may include a molar ratio of hydrogen to other combustible fuels of at least 1:1.
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公开(公告)号：US11479521B2
公开(公告)日：2022-10-25
申请号：US16491318
申请日：2018-03-09
Applicant: Dow Global Technologies LLC
Inventor： Matthew T. Pretz
Abstract: According to one or more embodiments of the present disclosure, chemical streams may be processed by a method which may comprise operating a first chemical process, stopping the first chemical process and removing the first catalyst from the reactor, and operating a second chemical process. The reaction of the first chemical process may be a dehydrogenation reaction, a cracking reaction, a dehydration reaction, or a methanol-to-olefin reaction. The reaction of the second chemical process may be a dehydrogenation reaction, a cracking reaction, a dehydration reaction, or a methanol-to-olefin reaction. The first reaction and the second reaction may be different types of reactions.
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公开(公告)号：US20220251005A1
公开(公告)日：2022-08-11
申请号：US17621945
申请日：2020-06-08
Applicant: Dow Global Technologies LLC
Inventor： Hangyao Wang , Lin Luo , Yu Liu , Matthew T. Pretz , Andrzej Malek
Abstract: A method for operating an acetylene hydrogenation unit of a steam cracking system that integrates a fluidized catalytic dehydrogenation (FCDh) effluent from a fluidized catalytic dehydrogenation (FCDh) system may include separating a cracked gas from the steam cracking system into at least a hydrogenation feed comprising at least acetylene, CO, and hydrogen, introducing the FCDh effluent to the separation system, combining the FCDh effluent with the cracked gas upstream of the separation system, or both. The method may include hydrogenating acetylene in the hydrogenation feed. Elevated CO concentration in the hydrogenation feed due to the FCDh effluent may reduce a reaction rate of acetylene hydrogenation. The acetylene hydrogenation unit may operate at an elevated temperature relative to normal operating temperatures when the portion of the FCDh effluent is not integrated, such that a concentration of acetylene in the hydrogenated effluent is less than a threshold acetylene concentration.
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公开(公告)号：US20220024838A1
公开(公告)日：2022-01-27
申请号：US17496308
申请日：2021-10-07
Applicant: Dow Global Technologies LLC
Inventor： Matthew T. Pretz , Hangyao Wang , Lin Luo
IPC: C07C5/333
Abstract: According to one or more embodiments presently disclosed, a method for processing a chemical stream may include contacting a feed stream with a catalyst in a reactor portion of a reactor system that includes a reactor portion and a catalyst processing portion. Contacting the feed stream with the catalyst may cause a reaction forming an effluent. The method may include separating the effluent stream from the catalyst, passing the catalyst to the catalyst processing portion, and processing the catalyst in the catalyst processing portion. Processing the catalyst may include passing the catalyst to a combustor, combusting a supplemental fuel stream in the combustor to heat the catalyst, and treating the heated catalyst with an oxygen-containing gas. The supplemental fuel stream may include at least 1 mol % of one or more hydrocarbons, and a weight ratio of catalyst to hydrocarbons in the combustor may be at least 300:1.
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