公开(公告)号：US20180264424A1

公开(公告)日：2018-09-20

申请号：US15761557

申请日：2016-09-28

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Don F. Shaw ,  Richard E. Walter ,  Madhusudhan Kodam

IPC: B01J8/24 ,  C10G11/18 ,  B01J38/30

Abstract: A catalyst regenerator for combusting carbonaceous deposits from a catalyst comprising a first chamber which comprises a catalyst inlet for feeding spent catalyst with carbonaceous deposits to said first chamber, a supplemental fuel gas distributor, and a distributor for an oxygen containing gas for distributing oxygen containing gas into said first chamber to contact said spent catalyst and combust carbonaceous deposits and supplemental fuel which further deactivates the spent catalyst and generates flue gas; a riser section extending from said first chamber for transporting the spent catalyst and the flue gas, the riser section comprising an outer wall, at least one slot in the outer wall, and a riser termination device which comprises a substantially internally flat cover plate, at least one arm extending from the cover plate, wherein the arm extends about the slot from the outer wall, the arm comprising an outer shell that encloses the arm and wherein no internal portion of the cover plate extends above an upper surface of the outer shell of the at least one arm is provided. Further provided is a riser termination device.

公开(公告)号：US10005056B2

公开(公告)日：2018-06-26

申请号：US15605074

申请日：2017-05-25

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz

IPC: B01J8/34

CPC classification number: B01J8/34 ,  B01J8/0055 ,  B01J8/125 ,  B01J8/1827 ,  B01J8/1872 ,  B01J2208/00991 ,  C07C5/333 ,  C10G11/08 ,  C07C11/06

Abstract: A fluidized catalyst stripping unit for displacing entrained gas from catalyst particles comprising: a vessel housing a two stage cyclonic separation section which comprises one or more primary cyclonic separation devices and one or more secondary cyclones; a stripping section which comprises internals; and an inlet in fluid communication with a catalytic reactor to feed a particulate-fluid suspension to the two stage cyclonic separation section; wherein each primary cyclonic separation device comprises an internal cylindrical surface to separate a major fraction of the particulates from the suspension and form a vortex of reduced particulate content; a particulate discharge outlet from each secondary cyclone to the stripping section; wherein the particulate discharge outlet of the secondary cyclone is submerged in a catalyst bed located above the stripper internals, and wherein the stripping section comprises one or more bubble breaking grids within the catalyst bed and above the stripping internals is provided.

公开(公告)号：US20180079700A1

公开(公告)日：2018-03-22

申请号：US15561381

申请日：2016-03-07

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz

IPC: C07C5/333 ,  B01J23/62

CPC classification number: C07C5/3332 ,  B01J8/0025 ,  B01J8/0055 ,  B01J8/087 ,  B01J8/12 ,  B01J8/1836 ,  B01J8/1863 ,  B01J8/26 ,  B01J21/04 ,  B01J21/12 ,  B01J23/26 ,  B01J23/62 ,  B01J23/8871 ,  B01J23/92 ,  B01J23/94 ,  B01J23/96 ,  B01J35/0006 ,  B01J35/1009 ,  B01J35/1014 ,  B01J38/02 ,  B01J38/12 ,  B01J38/14 ,  B01J2208/00176 ,  B01J2208/00362 ,  B01J2208/00769 ,  B01J2219/00024 ,  C07C2521/04 ,  C07C2521/08 ,  C07C2521/12 ,  C07C2523/08 ,  C07C2523/42 ,  C07C2523/62 ,  Y02P20/125 ,  Y02P20/52 ,  Y02P20/584 ,  C07C11/06 ,  C07C11/08

Abstract: An integrated process, suitable for use in a new or retrofitted plant, produces an olefin or di-olefin via the dehydrogenation of an appropriate C3-C4 hydrocarbon feed includes (1) contacting the feed and a dehydrogenation catalyst having a Geldart A or Geldart B classification in a fluidized bed at a temperature from 550° C. to 760° C. and a pressure from about 41.4 to about 308.2 kPa (about 6.0 to about 44.7 psia) and a catalyst to feed ratio, w/w, from 5 to 100 to form a dehydrogenate product; separating the dehydrogenate product and unreacted starting feed mixture from a portion of the catalyst by means of a cyclonic separation system; reactivating the catalyst in a fluidized regenerator by combustion at 660° C. to 850° C., followed by contact with an oxygen-containing fluid at 660° C. or greater, and returning the catalyst to the dehydrogenation reactor; (2) compressing the product mixture to form a compressed product mixture; and (3) fractionating the compressed product mixture to form a product stream including at least the target olefin or di-olefin. The integrated process offers increased plant capacity, improved economics, and reduced environmental impact in comparison with other known and conventional processes.

公开(公告)号：US20170334811A1

公开(公告)日：2017-11-23

申请号：US15525348

申请日：2015-11-10

Applicant: Dow Global Technologies LLC

Inventor： Barry B. Fish ,  Matthew T. Pretz ,  Max M. Tirtowidjojo

IPC: C07C17/10 ,  C01B7/01 ,  C07C5/44 ,  C07C21/06

CPC classification number: C07C17/10 ,  C01B7/01 ,  C07C5/44 ,  C07C21/06 ,  C07C11/04

Abstract: A process is provided for the chlorination of ethane using chlorine as the chlorinating agent to produce ethylene, hydrogen chloride (HCl) and vinyl chloride monomer (VCM).

公开(公告)号：US20170151544A1

公开(公告)日：2017-06-01

申请号：US14955344

申请日：2015-12-01

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz

IPC: B01J8/34

CPC classification number: B01J8/34 ,  B01J8/0055 ,  B01J2208/00991 ,  C07C5/333 ,  C10G11/08 ,  C07C11/06

Abstract: A fluidized catalyst stripping unit for displacing entrained gas from catalyst particles comprising: a vessel housing a two stage cyclonic separation section which comprises one or more primary cyclonic separation devices and one or more secondary cyclones; a stripping section which comprises internals; and an inlet in fluid communication with a catalytic reactor to feed a particulate-fluid suspension to the two stage cyclonic separation section; wherein each primary cyclonic separation device comprises an internal cylindrical surface to separate a major fraction of the particulates from the suspension and form a vortex of reduced particulate content; a particulate discharge outlet from each secondary cyclone to the stripping section; wherein the particulate discharge outlet of the secondary cyclone is submerged in a catalyst bed located above the stripper internals, and wherein the stripping section comprises one or more bubble breaking grids within the catalyst bed and above the stripping internals is provided.

公开(公告)号：US20240399328A1

公开(公告)日：2024-12-05

申请号：US18697853

申请日：2022-10-04

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Fermin Alejandro Sandoval ,  Mohan V. Punganur ,  Adam M. McNeeley ,  Jacobus Kloos ,  Anil V. Sakhare

IPC: B01J8/38 ,  B01J8/26

Abstract: Methods for producing olefins may include contacting a hydrocarbon feed stream with a particulate solid, the contacting of the hydrocarbon feed stream with the particulate solid reacting the hydrocarbon feed stream to form a product stream. The method may include separating the particulate solid from the product stream and passing at least a portion of the product stream and the hydrocarbon feed stream through a feed stream preheater. The feed stream preheater may include a shell and tube heat exchanger comprising a shell, a plurality of tubes extending axially through the shell, a shell side inlet, a shell side outlet, a tube side inlet, a tube side outlet, an inlet tube sheet, and an outlet tube sheet. The outlet tube sheet may be connected to the shell by an expansion joint.

公开(公告)号：US11987547B2

公开(公告)日：2024-05-21

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

CPC classification number: C07C5/3337 ,  C07C2523/08 ,  C07C2523/42 ,  C07C2523/62

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：US20240024836A1

公开(公告)日：2024-01-25

申请号：US18257361

申请日：2021-12-14

Applicant: DOW GLOBAL TECHNOLOGIES LLC

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

IPC: B01J8/18 ,  B01J8/26

CPC classification number: B01J8/1872 ,  B01J8/26 ,  B01J2208/00884

Abstract: A supported riser apparatus may be housed at least partially within a vessel. The supported riser apparatus may include a riser including a non-vertical riser segment, a non-linear riser segment, and a vertical riser segment. The supported riser apparatus may further include a support member comprising a proximal end and a distal end. The proximal end of the support member may be connected to the non-vertical riser segment and the angle between the support member and the non-vertical riser segment may be from 15 to 75. The supported riser apparatus may include a support structure connected to the riser and the support member and an expansion guide connected to an interior surface of the vessel. The expansion guide may be shaped and positioned such that the support member slides across the expansion guide as the support member undergoes thermal expansion or thermal contraction.

公开(公告)号：US11339105B2

公开(公告)日：2022-05-24

申请号：US17272741

申请日：2019-08-15

Applicant: Dow Global Technologies LLC

Inventor： Lin Luo ,  Matthew T. Pretz

IPC: C07C5/48 ,  B01J38/12 ,  B01J8/00 ,  B01J8/18 ,  B01J8/26

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：US20210261482A1

公开(公告)日：2021-08-26

申请号：US17256706

申请日：2019-06-26

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Mark W. Stewart ,  Lin Luo ,  Hangyao Wang

IPC: C07C5/333 ,  B01J23/62 ,  B01J21/12 ,  B01J23/96 ,  B01J38/02 ,  B01J38/12 ,  B01J8/00 ,  B01J8/24 ,  B01J8/18

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.