公开(公告)号：US12291498B2

公开(公告)日：2025-05-06

申请号：US18664822

申请日：2024-05-15

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Hangyao Wang ,  Anthony Plauck ,  Adam M. McNeeley

IPC: C07C5/333

Abstract: According to one or more embodiments, a method for forming light olefins may comprise introducing a hydrocarbon feed stream into a reactor, reacting the hydrocarbon feed stream with a dehydrogenation catalyst in the reactor to from a high temperature dehydrogenated product, separating at least a portion of the dehydrogenation catalyst from the high temperature dehydrogenated product in a primary separation device, combining the high temperature dehydrogenation product with a quench stream to cool the high temperature dehydrogenation product and form an intermediate temperature dehydrogenation product, and cooling the intermediate temperature dehydrogenation product to form a cooled dehydrogenation product.

公开(公告)号：US20240100496A1

公开(公告)日：2024-03-28

申请号：US18267534

申请日：2021-12-14

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Donald F. Shaw ,  Richard Edwards Walter ,  Fermin Alejandro Sandoval ,  Albert Meza

IPC: B01J8/18 ,  B01J8/26

CPC classification number: B01J8/1863 ,  B01J8/26 ,  B01J2208/00017 ,  B01J2208/00991

Abstract: According to one or more embodiments of the present disclosure, a riser may be operated by a method including repeatedly heating and cooling a riser between an operational temperature and a non-operational temperature. When the riser is heated from a non-operational temperature to an operational temperature, the riser undergoes thermal expansion. When the riser is cooled from an operational temperature to a non-operational temperature, the riser undergoes thermal contraction. The riser undergoes irreversible growth over repeated heating and cooling cycles, and the length of a lower section of an upper riser portion is sized to accommodate the irreversible growth from cycled thermal expansion of the riser.

公开(公告)号：US20230257327A1

公开(公告)日：2023-08-17

申请号：US18307619

申请日：2023-04-26

Applicant: Dow Global Technologies LLC

Inventor： Kevin Blann ,  Alexey Kirilin ,  Andrzej Malek ,  Victor Sussman ,  Matthew T. Pretz ,  Brien A. Stears ,  Barry B. Fish ,  Eric E. Stangland ,  Brian W. Goodfellow ,  Manish Sharma

IPC: C07C5/48 ,  B01J21/04 ,  B01J21/06 ,  B01J21/10 ,  B01J23/08 ,  B01J23/26 ,  B01J23/42

CPC classification number: C07C5/48 ,  B01J21/04 ,  B01J21/06 ,  B01J21/10 ,  B01J23/08 ,  B01J23/26 ,  B01J23/42 ,  C07C2521/04 ,  C07C2521/06 ,  C07C2521/10 ,  C07C2523/08 ,  C07C2523/26 ,  C07C2523/42

Abstract: According to one or more embodiments described herein, a method for dehydrogenating hydrocarbons may include passing a hydrocarbon feed comprising one or more alkanes or alkyl aromatics into a fluidized bed reactor, contacting the hydrocarbon feed with a dehydrogenation catalyst in the fluidized bed reactor to produce a dehydrogenated product and hydrogen, and contacting the hydrogen with an oxygen-rich oxygen carrier material in the fluidized bed reactor to combust the hydrogen and form an oxygen-diminished oxygen carrier material. In additional embodiments, a dual-purpose material may be utilized which has dehydrogenation catalyst and oxygen carrying functionality.

公开(公告)号：US20220356130A1

公开(公告)日：2022-11-10

申请号：US17622412

申请日：2020-06-12

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Hangyao Wang ,  Anthony Plauck ,  Adam M. McNeeley

IPC: C07C5/333

Abstract: According to one or more embodiments, a method for forming light olefins may comprise introducing a hydrocarbon feed stream into a reactor, reacting the hydrocarbon feed stream with a dehydrogenation catalyst in the reactor to form a high temperature dehydrogenated product, separating at least a portion of the dehydrogenation catalyst from the high temperature dehydrogenated product in a primary separation device, combining the high temperature dehydrogenation product with a quench stream to cool the high temperature dehydrogenation product and form an intermediate temperature dehydrogenation product, and cooling the intermediate temperature dehydrogenation product to form a cooled dehydrogenation product.

公开(公告)号：US11203559B2

公开(公告)日：2021-12-21

申请号：US17256688

申请日：2019-06-26

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.

公开(公告)号：US20210371357A1

公开(公告)日：2021-12-02

申请号：US17272741

申请日：2019-08-15

Applicant: Dow Global Technologies LLC

Inventor： Lin Luo ,  Matthew T. Pretz

IPC: C07C5/48 ,  B01J8/18 ,  B01J8/26 ,  B01J8/00

Abstract: According to one or more embodiments disclosed herein, methods for operating dehydrogenation processes during non-normal operating conditions, such as at start-up, shut-down, system recycle, or unit trip, are described. The methods may include contacting a feed stream with a catalyst in a reactor portion of a reactor system to form a reactor effluent stream, separating at least a portion of the reactor effluent stream from the catalyst, passing the catalyst to a catalyst processing portion and processing the catalyst, wherein processing the catalyst comprises contacting the catalyst with oxygen, passing the catalyst from the processing portion to the reactor portion, wherein the catalyst exiting the processing portion comprises at least 0.001 wt. % oxygen, and contacting the catalyst with supplemental hydrogen, the contacting removing at least a portion of the oxygen from the catalyst by a combustion reaction.

公开(公告)号：US20210260555A1

公开(公告)日：2021-08-26

申请号：US17256690

申请日：2019-06-26

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz

IPC: B01J8/26 ,  C10G9/32 ,  B01J8/00 ,  B01J8/12 ,  C10G2/00 ,  C10G11/18 ,  C10G11/22

Abstract: A process for commencing a continuous reaction in a reactor system includes introducing a catalyst to a catalyst processing portion of the reactor system, the catalyst initially having a first temperature of 500 C or less, and contacting the catalyst at the first temperature with a commencement fuel gas stream, which includes at least 80 mol % commencement fuel gas, in the catalyst processing portion. Contacting of the catalyst with the commencement fuel gas stream causes combustion of the commencement fuel gas. The process includes maintaining the contacting of the catalyst with the commencement fuel gas stream until the temperature of the catalyst increases from the first temperature to a second temperature at which combustion of a regenerator fuel source maintains an operating temperature range in the catalyst processing portion.

公开(公告)号：US10688477B2

公开(公告)日：2020-06-23

申请号：US16094582

申请日：2017-05-05

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Liwei Li

IPC: B01J23/96 ,  C10G11/18 ,  B01J38/18 ,  B01J8/00 ,  B01J8/18 ,  B01J8/34 ,  B01J8/26 ,  B01J23/62 ,  B01J38/02 ,  B01J38/04 ,  B01J38/10 ,  C07C5/333 ,  B01J38/30

Abstract: A process to react an oxygen containing regenerated catalyst stream prior to use in a fluidized bed reactor comprising providing a regenerated catalyst stream which comprises at least 0.001 wt % oxygen; reacting the regenerated catalyst stream with a fuel source thereby forming oxides and reducing the amount of oxygen in the regenerated catalyst stream to produce a usable regenerated catalyst stream; and injecting the usable regenerated catalyst stream into a hydrocarbon fluidized bed reactor is provided.

公开(公告)号：US20200017426A1

公开(公告)日：2020-01-16

申请号：US16491331

申请日：2018-03-09

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Yu Liu

IPC: C07C4/06 ,  C07C5/333 ,  C10G11/18 ,  C07C11/04 ,  C07C11/06 ,  C07C11/08

Abstract: According to one or more embodiments presently disclosed, light olefins may be formed by a method that may comprise introducing a feed stream into a reactor, reacting the feed stream with a cracking catalyst in the reactor to form a product stream, and processing the cracking catalyst. The reactor may comprise an upstream reactor section and a downstream reactor section. The upstream reactor section may be positioned below the downstream reactor section. The upstream reactor section may have an average cross-sectional area that is at least 150% of the average cross-sectional area of the downstream reactor section.

公开(公告)号：US20190282987A1

公开(公告)日：2019-09-19

申请号：US16346626

申请日：2017-10-30

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Ben J. Freireich ,  Madhusudhan Kodam ,  Brien A. Stears

IPC: B01J8/26

Abstract: According to one or more embodiments of the present disclosure, a fluid catalytic reactor may be scaled-up by a method that includes one or more of constructing, operating, observing, or obtaining data related to a template fluid catalytic reactor comprising a template riser, a template lower reactor portion, and a template transition portion connecting the template riser and the template lower reactor portion. The method may further include one or more of constructing or operating a scaled-up fluid catalytic reactor based on the template fluid catalytic reactor.