Patents by Inventor Hangyao Wang

Hangyao Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220356130
    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.
    Type: Application
    Filed: June 12, 2020
    Publication date: November 10, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Hangyao Wang, Anthony Plauck, Adam M. McNeeley
  • Publication number: 20220340505
    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.
    Type: Application
    Filed: July 8, 2022
    Publication date: October 27, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Mark W. Stewart, Lin Luo, Hangyao Wang
  • Patent number: 11414363
    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.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: August 16, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Mark W. Stewart, Lin Luo, Hangyao Wang
  • Publication number: 20220251005
    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.
    Type: Application
    Filed: June 8, 2020
    Publication date: August 11, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Hangyao Wang, Lin Luo, Yu Liu, Matthew T. Pretz, Andrzej Malek
  • Publication number: 20220251006
    Abstract: A method for operating an integrated system for producing olefins may include contacting a hydrogenation feed with a first hydrogenation catalyst to produce a hydrogenated effluent, the hydrogenation feed including at least a portion of a first process effluent from a first olefin production process and at least a portion of a second process effluent from a second olefin production process. The hydrogenation feed may include at least hydrogen, ethylene, carbon monoxide, acetylene, methyl acetylene, and propadiene, and the first hydrogenation catalyst may be a hydrogenation catalyst having a temperature operating range of at least 40° C. The hydrogenated effluent may include methyl acetylene, propadiene, or both. The method may further include contacting at least a portion of the hydrogenated effluent with a second hydrogenation catalyst, which may cause hydrogenation of at least a portion of the methyl acetylene and propadiene to produce an MAPD hydrogenated effluent.
    Type: Application
    Filed: June 8, 2020
    Publication date: August 11, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Lin Luo, Hangyao Wang, Yu Liu, Barry B. Fish
  • Publication number: 20220227687
    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.
    Type: Application
    Filed: June 8, 2020
    Publication date: July 21, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Lin Luo, Hangyao Wang, Yu Liu, Matthew T. Pretz, Andrzej Malek
  • Publication number: 20220135498
    Abstract: A method for selectively hydrogenating acetylene in a cracked gas from a steam cracking unit for producing olefins may include separating a hydrogenation feed from the cracked gas. The hydrogenation feed may include acetylene, hydrogen, carbon monoxide, and at least one product. The method may further include contacting the hydrogenation feed with an acetylene hydrogenation catalyst, the contacting causing hydrogenation of at least a portion of the acetylene of the hydrogenation feed to produce a hydrogenation effluent. In response to a change in a composition of a feedstock to the steam cracking unit that results in a change in a hydrogen concentration in the hydrogenation feed, the method may further include determining the hydrogen concentration in the hydrogenation feed and increasing or decreasing a temperature of the hydrogenation feed based on the determined hydrogen concentration of the hydrogenation feed.
    Type: Application
    Filed: February 4, 2020
    Publication date: May 5, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Hangyao Wang, Yu Liu, Ernest R. Frank, Lin Luo
  • Publication number: 20220024838
    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.
    Type: Application
    Filed: October 7, 2021
    Publication date: January 27, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Hangyao Wang, Lin Luo
  • Patent number: 11203559
    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.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: December 21, 2021
    Assignee: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Hangyao Wang, Lin Luo
  • Publication number: 20210261481
    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.
    Type: Application
    Filed: June 26, 2019
    Publication date: August 26, 2021
    Applicant: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Hangyao Wang, Lin Luo
  • Publication number: 20210261482
    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.
    Type: Application
    Filed: June 26, 2019
    Publication date: August 26, 2021
    Applicant: Dow Global Technologies LLC
    Inventors: Matthew T. Pretz, Mark W. Stewart, Lin Luo, Hangyao Wang
  • Patent number: 9914996
    Abstract: The hardness of zinc sulfide is increased by adding selective elements within a specified range to the crystal lattice of the zinc sulfide. The increased hardness over conventional zinc sulfide does not substantially compromise the optical properties of the zinc sulfide. The zinc sulfide may be used as a protective coating for windows and domes.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: March 13, 2018
    Assignees: Rohm and Haas Electronic Materials LLC, Dow Global Technologies LLC
    Inventors: Jitendra S. Goela, Hangyao Wang, Hua Bai, Michael A. Pickering
  • Patent number: 9863040
    Abstract: A method is directed to increasing the hardness of zinc sulfide. The hardness of zinc sulfide is increased by adding selective elements within a specified range to the crystal lattice of the zinc sulfide. The increased hardness over conventional zinc sulfide does not substantially compromise the optical properties of the zinc sulfide. The zinc sulfide may be used as a protective coating for windows and domes.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: January 9, 2018
    Assignees: Dow Global Technologies LLC, Rohm and Haas Electronic Materials LLC
    Inventors: Jitendra S. Goela, Hangyao Wang, Hua Bai, Michael A. Pickering
  • Patent number: 9562286
    Abstract: The hardness of zinc sulfide is increased by adding selective elements within a specified range to the crystal lattice of the zinc sulfide. The increased hardness over conventional zinc sulfide does not substantially compromise the optical properties of the zinc sulfide. The zinc sulfide may be used as a protective coating for windows and domes.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: February 7, 2017
    Assignees: Dow Global Technologies LLC, Rohm and Haas Electronic Materials LLC
    Inventors: Jitendra S. Goela, Hangyao Wang, Hua Bai, Michael A. Pickering
  • Publication number: 20170022368
    Abstract: The hardness of zinc sulfide is increased by adding selective elements within a specified range to the crystal lattice of the zinc sulfide. The increased hardness over conventional zinc sulfide does not substantially compromise the optical properties of the zinc sulfide. The zinc sulfide may be used as a protective coating for windows and domes.
    Type: Application
    Filed: October 6, 2016
    Publication date: January 26, 2017
    Inventors: Jitendra S. GOELA, Hangyao WANG, Hua BAI, Michael A. PICKERING
  • Publication number: 20160281220
    Abstract: The hardness of zinc sulfide is increased by adding selective elements within a specified range to the crystal lattice of the zinc sulfide. The increased hardness over conventional zinc sulfide does not substantially compromise the optical properties of the zinc sulfide. The zinc sulfide may be used as a protective coating for windows and domes.
    Type: Application
    Filed: June 10, 2016
    Publication date: September 29, 2016
    Inventors: Jitendra S. GOELA, Hangyao Wang, Hua Bai, Michael A. Pickering
  • Publication number: 20160017486
    Abstract: The hardness of zinc sulfide is increased by adding selective elements within a specified range to the crystal lattice of the zinc sulfide. The increased hardness over conventional zinc sulfide does not substantially compromise the optical properties of the zinc sulfide. The zinc sulfide may be used as a protective coating for windows and domes.
    Type: Application
    Filed: September 26, 2014
    Publication date: January 21, 2016
    Inventors: Jitendra S. GOELA, Hangyao WANG, Hua BAI, Michael A. PICKERING
  • Patent number: 8613899
    Abstract: An apparatus includes a manifold with a chamber for mixing multiple reactants. Gases are jetted into the manifold by a plurality of inlet injectors. The inlet injectors are arranged such that the gases passing into the manifold impinge on each other at a common point to form a mixture. The mixture passes through a plurality of holes in one side of the manifold into a deposition chamber where the mixture of gases impinges on additional gases at a common point to provide a reaction resulting in deposition of solid materials in the deposition chamber. The solid materials are free-standing.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: December 24, 2013
    Assignees: Rohm and Haas Electronic Materials LLC, Dow Global Technologies LLC
    Inventors: Heather A. G. Stern, Vincent DiFilippo, Jitendra S. Goela, Michael A. Pickering, Hua Bai, Debashis Chakraborty, Hangyao Wang
  • Publication number: 20130270356
    Abstract: An apparatus includes a manifold with a chamber for mixing multiple reactants. Gases are jetted into the manifold by a plurality of inlet injectors. The inlet injectors are arranged such that the gases passing into the manifold impinge on each other at a common point to form a mixture. The mixture passes through a plurality of holes in one side of the manifold into a deposition chamber where the mixture of gases impinges on additional gases at a common point to provide a reaction resulting in deposition of solid materials in the deposition chamber. The solid materials are free-standing.
    Type: Application
    Filed: April 17, 2012
    Publication date: October 17, 2013
    Applicants: Dow Globel Technologies LLC, Rohm and Haas Electronic Materials LLC
    Inventors: Heather A. G. Stern, Vincent DiFilippo, Jitendra S. Goela, Michael A. Pickering, Hua Bai, Debashis Chakraborty, Hangyao Wang