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).
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Publication number: 20240376026Abstract: According to one or more embodiments of the present disclosure, a method for processing chemicals may include reacting a feed stream in the presence of a catalyst to form a product stream, passing the catalyst to a regenerator, removing olefins from a supplemental fuel stream to form an olefin depleted supplemental fuel stream, passing the olefin depleted supplemental fuel stream to the regenerator, combusting the olefin depleted supplemental fuel stream in the regenerator to heat the catalyst, and passing the heated catalyst to the reactor. The supplemental fuel stream may include at least 90 mol. % of the combination of hydrogen, methane, and nitrogen. The supplemental fuel stream may include from 0.1 mol. % to 10 mol. % olefins. The olefin depleted supplemental fuel stream may include less than or equal to 50% of the olefins present in the supplemental fuel stream prior to the olefin removal.Type: ApplicationFiled: October 3, 2022Publication date: November 14, 2024Applicant: Dow Global Technologies LLCInventors: Lin Luo, Hangyao Wang, Yu Liu, Matthew T. Pretz
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Publication number: 20240343663Abstract: A method for dehydrogenation of one or more hydrocarbons and regeneration and reactivation of a catalyst composition includes contacting a first gaseous stream comprising a first hydrocarbon, such as propane, with a catalyst composition in a dehydrogenation reactor at a first temperature, thereby producing a first dehydrogenated hydrocarbon, such as propylene, and a deactivated catalyst composition; combusting at least one fuel gas and coke on the deactivated catalyst in the presence of oxygen at a second temperature, thereby producing a heated catalyst composition; and reactivating the catalyst in the presence of oxygen. The second temperature is from 50° C. to 200° C. greater than the first temperature. The catalyst composition is also described and comprises gallium, platinum and a further noble metal, such as palladium.Type: ApplicationFiled: August 29, 2022Publication date: October 17, 2024Applicant: Dow Global Technologies LLCInventors: Lin Luo, Adrianus Koeken, Mingzhe Yu, Andrzej Malek, Hangyao Wang, Luis Bollmann
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Publication number: 20240300872Abstract: 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.Type: ApplicationFiled: May 15, 2024Publication date: September 12, 2024Applicant: Dow Global Technologies LLCInventors: Matthew T. Pretz, Hangyao Wang, Anthony Plauck, Adam M. McNeeley
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Patent number: 11987547Abstract: 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: GrantFiled: June 12, 2020Date of Patent: May 21, 2024Assignee: Dow Global Technologies LLCInventors: Matthew T. Pretz, Hangyao Wang, Anthony Plauck, Adam M. McNeeley
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Patent number: 11773038Abstract: 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: GrantFiled: June 8, 2020Date of Patent: October 3, 2023Assignee: Dow Global Technoogies LLCInventors: Lin Luo, Hangyao Wang, Yu Liu, Matthew T. Pretz, Andrzej Malek
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Patent number: 11731924Abstract: 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: GrantFiled: June 8, 2020Date of Patent: August 22, 2023Assignee: Dow Global Technologies LLCInventors: Hangyao Wang, Lin Luo, Yu Liu, Matthew T. Pretz, Andrzej Malek
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Patent number: 11718572Abstract: 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: GrantFiled: June 8, 2020Date of Patent: August 8, 2023Assignee: Dow Global Technologies LLCInventors: Lin Luo, Hangyao Wang, Yu Liu, Barry B. Fish
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Publication number: 20230227382Abstract: Methods for producing olefins through hydrocarbon steam cracking include passing a hydrocarbon feed that includes one or more hydrocarbons to a hydrocarbon cracking unit and passing one or more sulfur-containing compounds to the hydrocarbon cracking unit. The sulfur- containing compounds include at least hydrogen sulfide gas, and a flow rate of the sulfur- containing compounds to the hydrocarbon cracking unit is sufficient to produce a molar concentration of elemental sulfur in the hydrocarbon cracking unit of from 10 ppm to 200 ppm. The methods include cracking the hydrocarbon feed in the hydrocarbon cracking unit to produce a cracker effluent and contacting the cracker effluent with a quench fluid in a quench unit to produce at least a cracked gas and a first pygas. The first pygas has a concentration of carbon disulfide less than 50 ppmw based on the total mass flow rate of the first pygas.Type: ApplicationFiled: June 17, 2021Publication date: July 20, 2023Applicant: Dow Global Technologies LLCInventors: Hangyao Wang, Jorge H. Pazmino, Yu Liu, Georgios Bellos
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Patent number: 11643377Abstract: 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: GrantFiled: July 8, 2022Date of Patent: May 9, 2023Assignee: Dow Global Technologies LLCInventors: Matthew T. Pretz, Mark W. Stewart, Lin Luo, Hangyao Wang
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Patent number: 11613506Abstract: 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: GrantFiled: October 7, 2021Date of Patent: March 28, 2023Assignee: Dow Global Technologies LLCInventors: Matthew T. Pretz, Hangyao Wang, Lin Luo
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Publication number: 20230089190Abstract: A process for oxidative dehydrogenation of a hydrocarbon to produce an olefin and water may include contacting, in a fluidized bed, the hydrocarbon with a particulate material, which may include at least one oxygen transfer agent (OTA) and at least one fluidization enhancing additive. During at least a portion of contacting the hydrocarbon with the particulate material, the fluidized bed may be at a temperature at or above a melting point of one or more materials of the oxygen transfer agent. Further, during at least a portion of contacting the hydrocarbon with the particulate material, a surface of at least a portion of the OTA may comprise a molten layer. The fluidization enhancing additive may not undergo reduction in the fluidized bed during contacting the hydrocarbon with the particulate material and may be present in an amount that maintains sufficient fluidization of the particulate material.Type: ApplicationFiled: February 19, 2021Publication date: March 23, 2023Applicants: Dow Global Technologies LLC, EcoCatalytic Inc.Inventors: Elena Y. Chung, John A. Sofranko, William K. Wang, Soumen Kundu, Hangyao Wang, Barry B. Fish, Matthew T. Pretz
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Patent number: 11584700Abstract: 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: GrantFiled: February 4, 2020Date of Patent: February 21, 2023Assignee: Dow Global Technologies LLCInventors: Hangyao Wang, Yu Liu, Ernest R. Frank, Lin Luo
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Publication number: 20220356130Abstract: 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: ApplicationFiled: June 12, 2020Publication date: November 10, 2022Applicant: Dow Global Technologies LLCInventors: Matthew T. Pretz, Hangyao Wang, Anthony Plauck, Adam M. McNeeley
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Publication number: 20220340505Abstract: 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: ApplicationFiled: July 8, 2022Publication date: October 27, 2022Applicant: Dow Global Technologies LLCInventors: Matthew T. Pretz, Mark W. Stewart, Lin Luo, Hangyao Wang
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Patent number: 11414363Abstract: 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: GrantFiled: June 26, 2019Date of Patent: August 16, 2022Assignee: Dow Global Technologies LLCInventors: Matthew T. Pretz, Mark W. Stewart, Lin Luo, Hangyao Wang
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Publication number: 20220251005Abstract: 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: ApplicationFiled: June 8, 2020Publication date: August 11, 2022Applicant: Dow Global Technologies LLCInventors: Hangyao Wang, Lin Luo, Yu Liu, Matthew T. Pretz, Andrzej Malek
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Publication number: 20220251006Abstract: 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: ApplicationFiled: June 8, 2020Publication date: August 11, 2022Applicant: Dow Global Technologies LLCInventors: Lin Luo, Hangyao Wang, Yu Liu, Barry B. Fish
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Publication number: 20220227687Abstract: 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: ApplicationFiled: June 8, 2020Publication date: July 21, 2022Applicant: Dow Global Technologies LLCInventors: Lin Luo, Hangyao Wang, Yu Liu, Matthew T. Pretz, Andrzej Malek
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Publication number: 20220135498Abstract: 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: ApplicationFiled: February 4, 2020Publication date: May 5, 2022Applicant: Dow Global Technologies LLCInventors: Hangyao Wang, Yu Liu, Ernest R. Frank, Lin Luo
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Publication number: 20220024838Abstract: 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: ApplicationFiled: October 7, 2021Publication date: January 27, 2022Applicant: Dow Global Technologies LLCInventors: Matthew T. Pretz, Hangyao Wang, Lin Luo