中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

90 records (took 0.024 seconds)

    CATALYTIC DEHYDROGENATION PROCESS
    31.
    发明申请
    CATALYTIC DEHYDROGENATION PROCESS 有权
    催化脱氢工艺

    公开(公告)号：US20160272559A1

    公开(公告)日：2016-09-22

    申请号：US15034637

    申请日：2014-10-14

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Matthew T. Pretz ,  Mark W. Stewart

    IPC: 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.

    Abstract translation: 一种改进的催化脱氢方法，该方法包括在上游流化反应器中在催化条件下使烷烃或烷基芳族原料流与脱氢催化剂接触，其中该流化反应器包括一个或多个反应器，该催化条件包括在 从500至800℃，重时空速在0.1至1000范围内，气体停留时间在0.1至10秒的范围内，并且在流化反应器之后，将夹带的催化剂从 反应器流出物，其中改进包括在上流式流化反应器和旋风分离系统之间插入冷却装置以基本上停止热反应，由此有效地提高了对烯烃产物的总的摩尔选择性。

    METHODS OF OPERATING GAS DISTRIBUTORS
    32.
    发明申请
    METHODS OF OPERATING GAS DISTRIBUTORS 有权

    公开(公告)号：US20250153130A1

    公开(公告)日：2025-05-15

    申请号：US18862013

    申请日：2023-05-05

    Applicant: Dow Global Technologies LLC

    Inventor： Matthew T. Pretz ,  Liwei Li ,  Yu Liu ,  Quan Yuan ,  Rami H. Sabbah ,  Yuan Yao ,  Chi-Wei Tsang

    IPC: B01J8/18

    Abstract: According to embodiments disclosed herein, a method of operating gas distributers may include passing a solid particulate to a processing unit, where the processing unit includes at least a first distributor and a second distributor, wherein the first distributor and second distributor is operable to pass a combustible gas and a decoking gas into the processing unit, passing the combustible gas into the processing unit through the first distributor, wherein the combustible gas is contacted with the solid particulate and coke forms on the first distributor, halting the passing of the combustible gas through the first distributor while the combustible gas is passed through the second distributor, passing the decoking gas through the first distributor while the combustible gas is passed through the second distributor, wherein the decoking gas removes coke formed on the first distributor, and resuming the passing of the combustible gas through the first distributor.

    CHEMICAL FEED DISTRIBUTORS AND METHODS OF USING THE SAME
    33.
    发明公开
    CHEMICAL FEED DISTRIBUTORS AND METHODS OF USING THE SAME 审中-公开

    公开(公告)号：US20230364575A1

    公开(公告)日：2023-11-16

    申请号：US18246949

    申请日：2021-09-30

    Applicant: Dow Global Technologies LLC

    Inventor： Matthew T. Pretz ,  Quan Yuan ,  Pritish M. Kamat ,  Liwei Li ,  Lin Luo

    IPC: B01J8/18 ,  B01J8/00 ,  B01J8/44

    CPC classification number: B01J8/1827 ,  B01J8/0085 ,  B01J8/44 ,  B01J2208/00902 ,  B01J2208/00911

    Abstract: According to one or more embodiments, a chemical feed distributor may include a chemical feed inlet, a body, a plurality of primary chemical feed outlets, and a secondary chemical feed outlet. The chemical feed inlet may pass a chemical feed stream into the chemical feed distributor. One or more walls of the body may define an elongated chemical feed stream flow path. The plurality of primary chemical feed outlets may be spaced along at least a portion of the length of the elongated chemical feed stream flow path and may be operable to pass a first portion of the chemical feed stream out of the feed distributor and into a vessel. The secondary chemical feed outlet may be downstream of the plurality of primary chemical feed outlets and may be operable to pass a second portion of the chemical feed stream out of the chemical feed distributor.

    Chemical processes and systems that include the combustion of supplemental fuels
    36.
    发明授权
    Chemical processes and systems that include the combustion of supplemental fuels 有权

    公开(公告)号：US11613506B2

    公开(公告)日：2023-03-28

    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.

    Reactor systems comprising fluid recycling
    37.
    发明授权
    Reactor systems comprising fluid recycling 有权

    公开(公告)号：US11478769B2

    公开(公告)日：2022-10-25

    申请号：US17325489

    申请日：2021-05-20

    Applicant: Dow Global Technologies LLC

    Inventor： Matthew T. Pretz

    IPC: B01D47/06 ,  B01J8/18 ,  B01J8/00 ,  B01J8/26 ,  C10G11/18 ,  B01D47/14

    Abstract: A method for processing a chemical stream includes contacting a feed stream with a catalyst in an upstream reactor section of a reactor having the upstream reactor section and a downstream reactor section, passing an intermediate product stream to the downstream reactor section, and introducing a riser quench fluid into the downstream reactor section, upstream reactor section, or transition section and into contact with the intermediate product stream and the catalyst to slow or stop the reaction. The method includes separating at least a portion of the catalyst from the product stream, passing the product stream to a product processing section, cooling the product stream, and separating a portion of the riser quench fluid from the product stream. The riser quench fluid separated from the product stream may be recycled back to the downstream reactor section, upstream reactor section, or transition section as the riser quench fluid.

    Methods for forming light olefins by cracking
    38.
    发明授权
    Methods for forming light olefins by cracking 有权

    公开(公告)号：US11459282B2

    公开(公告)日：2022-10-04

    申请号：US16491331

    申请日：2018-03-09

    Applicant: Dow Global Technologies LLC

    Inventor： Matthew T. Pretz ,  Yu Liu

    IPC: C07C4/06 ,  C10G11/18 ,  C07C5/333 ,  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.

    METHODS FOR OPERATING ACETYLENE HYDROGENATION UNITS IN INTEGRATED STEAM CRACKING AND FLUIDIZED CATALYTIC DEHYDROGENATION SYSTEMS
    39.
    发明申请
    METHODS FOR OPERATING ACETYLENE HYDROGENATION UNITS IN INTEGRATED STEAM CRACKING AND FLUIDIZED CATALYTIC DEHYDROGENATION SYSTEMS 有权

    公开(公告)号：US20220227687A1

    公开(公告)日：2022-07-21

    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

    IPC: C07C5/333 ,  C07C4/04 ,  C07C7/167 ,  B01J23/62

    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.

    Bulk catalyst withdrawal system and methods for the use thereof
    40.
    发明授权
    Bulk catalyst withdrawal system and methods for the use thereof 有权

    公开(公告)号：US11298671B2

    公开(公告)日：2022-04-12

    申请号：US16609905

    申请日：2018-05-03

    Applicant: Dow Global Technologies LLC

    Inventor： Matthew T. Pretz

    IPC: B01J8/26 ,  B01J8/00 ,  B01J8/18 ,  B01J38/30 ,  C07C5/333

    Abstract: A method for processing a chemical stream includes contacting a feed stream with a catalyst in a reactor portion of a reactor system causing a reaction which forms a product stream. The method includes separating the product stream from the catalyst, passing the catalyst to a catalyst processing portion of the reactor system, processing the catalyst in the catalyst processing portion, and passing a portion of the catalyst from the catalyst processing portion of the reactor system into a catalyst withdrawal system that includes a catalyst withdrawal vessel and a transfer line coupling the catalyst withdrawal vessel to the catalyst processing portion. Each of the catalyst withdrawal vessel and the transfer line include an outer metallic shell and an inner refractory lining. The method further includes cooling the catalyst in the catalyst withdrawal vessel from greater than or equal to 680° C. to less than or equal to 350° C.

Patent Agency Ranking