公开(公告)号：US11414363B2

公开(公告)日：2022-08-16

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 ,  B01J8/00 ,  B01J8/18 ,  B01J8/24 ,  B01J21/12 ,  B01J23/62 ,  B01J23/96 ,  B01J38/02 ,  B01J38/12 ,  C07C5/32 ,  C07C5/327

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.

公开(公告)号：US10589242B2

公开(公告)日：2020-03-17

申请号：US16346586

申请日：2017-10-25

Applicant: Dow Global Technologies LLC

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

IPC: B01J8/34 ,  B01J8/26 ,  B01J8/00 ,  C10G11/18

Abstract: According to one or more embodiments, a fluid catalytic reactor may include a riser, a lower reactor portion, a transition portion, and a flow director. The riser may include a cross-sectional area, and the lower reactor portion may include a cross-sectional area. The transition portion may attach the riser to the lower reactor portion. The cross-sectional area of the riser may be less than the cross-sectional area of the lower reactor portion such that the transition portion is tapered inward from the lower reactor portion to the riser. The flow director may be positioned at least within an interior region of the transition portion. The flow director may include a body which affects the velocity profile of fluids moving from the lower reactor portion to the riser.

公开(公告)号：US10065905B2

公开(公告)日：2018-09-04

申请号：US15799398

申请日：2017-10-31

Applicant: Dow Global Technologies LLC

Inventor： Matthew Pretz ,  Lin Luo ,  Susan Domke ,  Howard W. Clark ,  Richard A. Pierce ,  Andrzej M. Malek ,  Mark W. Stewart ,  Brien A. Stears ,  Albert E. Schweizer, Jr. ,  Guido Capone ,  Duncan P. Coffey ,  Isa K. Mbaraka

IPC: C07C5/333 ,  B01J23/96 ,  B01J38/02 ,  B01J38/12 ,  B01J38/14 ,  C07C5/32 ,  B01J23/62

Abstract: Increase propane dehydrogenation activity of a partially deactivated dehydrogenation catalyst by heating the partially deactivated catalyst to a temperature of at least 660° C., conditioning the heated catalyst in an oxygen-containing atmosphere and, optionally, stripping molecular oxygen from the conditioned catalyst.

公开(公告)号：US09725382B2

公开(公告)日：2017-08-08

申请号：US15034637

申请日：2014-10-14

Applicant: Dow Global Technologies LLC

Inventor： Matthew T. Pretz ,  Mark W. Stewart

IPC: C07C5/32 ,  C07C5/333

CPC classification number: C07C5/3337 ,  C07C2521/04 ,  C07C2521/12 ,  C07C2523/08 ,  C07C2523/42 ,  C07C2523/62 ,  Y02P20/52 ,  C07C11/06

Abstract: An improved catalytic dehydrogenation process which process comprises contacting an alkane or alkyl aromatic feedstream with a dehydrogenation catalyst under catalytic conditions in an up-flow fluidized reactor, wherein the fluidized reactor comprises one or more reactors, which catalytic conditions include a temperature within a range of from 500 to 800° C., a weight hourly space velocity within a range of from 0.1 to 1000, a gas residence time within a range of from 0.1 to 10 seconds, and, subsequent to the fluidized reactor, effecting separation of entrained catalyst from reactor effluent by use of a cyclonic separation system, wherein the improvement comprises interposing a cooling means between an up-flow fluidized reactor and the cyclonic separation system to substantially halt thermal reactions, thereby effectively increasing overall molar selectivity to alkene product is provided.

公开(公告)号：US09643898B2

公开(公告)日：2017-05-09

申请号：US15030634

申请日：2014-11-17

Applicant: Dow Global Technologies LLC

Inventor： Derrick W. Flick ,  Mark W. Stewart

IPC: C07C1/24 ,  B01J21/04 ,  B01J29/40

CPC classification number: C07C1/24 ,  B01J21/04 ,  B01J29/40 ,  C07C2521/04 ,  C07C2529/40 ,  Y02P20/52 ,  C07C11/04

Abstract: Effect adiabatic, catalytic alkanol (alcohol) dehydration using two or more sequential dehydration catalyst beds each of which has disposed therein a different catalyst and, preferably, eliminating heating and heating apparatus disposed between each sequential pair of dehydration catalyst beds.

公开(公告)号：US20160244383A1

公开(公告)日：2016-08-25

申请号：US15030634

申请日：2014-11-17

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Derrick W. Flick ,  Mark W. Stewart

IPC: C07C1/24 ,  B01J21/04 ,  B01J29/40

CPC classification number: C07C1/24 ,  B01J21/04 ,  B01J29/40 ,  C07C2521/04 ,  C07C2529/40 ,  Y02P20/52 ,  C07C11/04

Abstract: Effect adiabatic, catalytic alkanol (alcohol) dehydration using two or more sequential dehydration catalyst beds each of which has disposed therein a different catalyst and, preferably, eliminating heating and heating apparatus disposed between each sequential pair of dehydration catalyst beds.

Abstract translation: 使用两个或更多个连续的脱水催化剂床进行绝热的催化链烷醇（醇）脱水，每个脱水催化剂床在其中设置有不同的催化剂，优选地消除了设置在每个顺序的一对脱水催化剂床之间的加热和加热装置。