Patents by Inventor Wen-Sheng Lee

Wen-Sheng Lee 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: 20250128241
    Abstract: A catalyst comprises gold particles and titanium-containing particles. The catalyst comprises gold particles that are within at least 15 nm of at least one titanium-containing particle. The gold particles have an average diameter of less than 15 nm and a standard deviation of +/?5 nm. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.
    Type: Application
    Filed: October 5, 2022
    Publication date: April 24, 2025
    Inventors: Kirk W. Limbach, Christopher D. Frick, Wen Sheng Lee, Victor J. Sussman
  • Patent number: 12251687
    Abstract: Embodiments of the present disclosure are directed towards methods of etherification including modifying a zeolite catalyst with phosphorus to provide a phosphorus modified zeolite catalyst; and contacting the phosphorus modified zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: March 18, 2025
    Assignee: Dow Global Technologies LLC
    Inventors: Wen-Sheng Lee, Dean Millar, Stephen W. King
  • Patent number: 12187671
    Abstract: Embodiments of the present disclosure are directed towards methods of etherification including modifying a zeolite catalyst with silica to provide a silica modified zeolite catalyst; and contacting the silica modified zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: January 7, 2025
    Assignee: Dow Global Technologies LLC
    Inventors: Wen-Sheng Lee, Sung-Yu Ku, Stephen W. King
  • Publication number: 20240286988
    Abstract: The present invention relates generally to gas phase processes for producing carboxylic acids or alkyl esters. In one embodiment, a gas phase process for producing a carboxylic acid or an alkyl ester comprises (a) providing a catalyst support comprising deposits of cobalt thiocyanate on at least a portion of the catalyst support; (b) heating the catalyst support to convert the cobalt thiocyanate on the support to cobalt sulfide to form a supported cobalt sulfide catalyst; and (c) reacting alkene gas, steam or an alkanol gas, and a carbon-containing gas in the presence of the supported cobalt sulfide catalyst in a reactor to form a product stream, wherein the carbon-containing gas comprises carbon monoxide or a mixture of carbon monoxide and carbon dioxide, wherein when steam is used as a reactant, the product stream comprises a carboxylic acid, and wherein when alkanol gas is used as a reactant, the product stream comprises an alkyl ester.
    Type: Application
    Filed: June 2, 2022
    Publication date: August 29, 2024
    Inventors: Alexey Kirilin, Beata A. Kilos, Wen -Sheng Lee, David G. Barton
  • Publication number: 20240279193
    Abstract: Disclosed herein are methods of improving the life of high selectivity, silver catalysts for making ethylene oxide. Ethylene and oxygen are reacted over the high efficiency catalyst with at least one organic chloride modifier, and during a catalyst aging period of no less than 0.03 kt ethylene oxide/cubic meter catalyst, the overall catalyst chloriding effectiveness never exceeds an efficiency-maximizing optimum overall catalyst chloriding effectiveness value that corresponds to a reference feed gas composition and a set of reference reaction condition values. Reaction temperature and/or feed gas oxygen concentration are adjusted to obtain or maintain a desired value of an ethylene oxide production parameter. Once the reaction temperature and/or oxygen concentration vary by a specified amount from their respective reference values in the set of reference reaction condition values, the overall catalyst chloriding effectiveness is changed to account for a shift in the optimum (efficiency-maximizing) value.
    Type: Application
    Filed: September 19, 2022
    Publication date: August 22, 2024
    Inventors: Wen -Sheng Lee, Mark H. McAdon, Edward M. Calverley, Vera Santos Castro
  • Publication number: 20240199518
    Abstract: A method includes the step of contacting an olefin, an alcohol, a metallosilicate catalyst and a solvent, wherein the solvent comprises structure (I) wherein R1 is selected from the group consisting of a hydrogen or an alkyl group and R2 is selected from the group consisting of an alkyl group or an alkoxy group.
    Type: Application
    Filed: June 20, 2022
    Publication date: June 20, 2024
    Inventors: Wen -Sheng Lee, Sung-Yu Ku, Le Wang, Paul D. Hutchins, Thomas Peterson
  • Patent number: 11945772
    Abstract: A method including the step contacting an olefin, an alcohol, a metallosilicate catalyst and a solvent, wherein the solvent comprises structure (I): wherein R1 and R2 are each selected from the group consisting of an aryl group and an alkyl group with the proviso that at least one of R1 and R2 is an aryl group, further wherein n is 1-3.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: April 2, 2024
    Assignee: Dow Global Technologies LLC
    Inventors: Wen-Sheng Lee, Mingzhe Yu, Jing L. Houser, Sung-Yu Ku, Wanglin Yu, Stephen W. King, Paulami Majumdar, Le Wang
  • Patent number: 11813593
    Abstract: A heterogeneous catalyst comprising a support and gold, wherein: (i) said support comprises alumina, (ii) said catalyst comprises from 0.1 to 5 wt % of gold, (iii) at least 90 wt % of the gold is in the outer 60% of catalyst volume, and (iv) particles of the catalyst have an average diameter from 200 microns to 30 mm; wherein weight percentages are based on weight of the catalyst.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: November 14, 2023
    Assignees: Rohm and Haas Company, Dow Global Technologies LLC
    Inventors: Kirk W. Limbach, Christopher D. Frick, Dmitry A. Krapchetov, Wen -Sheng Lee, Victor J. Sussman, Jeffrey A. Herron
  • Publication number: 20230321637
    Abstract: A catalyst comprising a noble metal disposed on a support. The noble metal is present in an amount ranging from 0.1 wt % to 10 wt % relative to the total weight of the catalyst. The support comprises at least 50 wt % silicon carbide relative to the total weight of the support. The silicon carbide has a surface area of at least 5 m2/g. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.
    Type: Application
    Filed: July 13, 2021
    Publication date: October 12, 2023
    Inventors: Alexey Kirilin, Kirk W. Limbach, Wen Sheng Lee, Jeffrey A. Herron, Victor J. Sussman
  • Publication number: 20230312446
    Abstract: Embodiments are directed towards a process for producing a (poly)alkylene glycol monoalkyl ether. The process includes providing an admixture of a crystalline metallosilicate molecular sieve catalyst and an oxide of a metal and reacting in a liquid phase process an olefin and a (poly)alkylene glycol in the presence of the admixture to yield the (poly)alkylene glycol monoalkyl ether. Reacting the olefin and the (poly)alkylene glycol in the presence of the admixture is at a temperature of 80° C. to 200° C.
    Type: Application
    Filed: September 2, 2021
    Publication date: October 5, 2023
    Applicant: Dow Global Technologies LLC
    Inventors: Beata A. Kilos, Aditya Bhan, Amy Wetzel, Wen-Sheng Lee
  • Publication number: 20230113685
    Abstract: A catalyst comprising noble metal particles and titanium-containing particles. The noble metal particles and titanium-containing particles are disposed on an outer surface of a support. At least 20% by weight of the total weight of noble metal particles are adjacent to at least one titanium-containing particle. The noble metal particles have an average diameter of less than 15 nm, and the catalyst has an average diameter of at least 200 microns. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.
    Type: Application
    Filed: March 15, 2021
    Publication date: April 13, 2023
    Inventors: Kirk W. Limbach, Christopher D. Frick, Wen -Sheng Lee, Victor J. Sussman, Dmitry A. Krapchetov, Jeffrey A. Herron
  • Patent number: 11577225
    Abstract: A heterogeneous catalyst comprising a support and a noble metal, wherein said support comprises silicon, and wherein said catalyst comprises from 0.1 to 40 mol % titanium and from 0.1 to 10 mol % of at least one noble metal.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 14, 2023
    Assignees: Dow Global Technologies LLC, Rohm and Haas Co.
    Inventors: Christopher D. Frick, Jeffrey A. Herron, Kirk W. Limbach, Wen Sheng Lee, Victor J. Sussman
  • Publication number: 20220395815
    Abstract: A method for preparing a heterogeneous catalyst. The method comprises steps of: (a) combining (i) a support, (ii) an aqueous solution of a noble metal compound and (iii) a C2-C18 thiol comprising at least one hydroxyl or carboxylic acid substituent; to form a wet particle and (b) removing water from the wet particle by drying followed by calcination to produce the catalyst.
    Type: Application
    Filed: August 17, 2022
    Publication date: December 15, 2022
    Inventors: Victor J. Sussman, Wen-Sheng Lee, Jeffrey A. Herron, D. Wayne Blaylock, Daniel J. Arriola, Andrew T. Heitsch, Alexey Kirilin, Heidi Clements, Abrin L. Schmucker, Daniel A. Hickman
  • Patent number: 11498057
    Abstract: A heterogeneous catalyst comprising a support and gold, wherein: (i) said support comprises titanium, (ii) said catalyst comprises from 0.1 to 5 wt % of gold, (iii) at least 90 wt % of the gold is in the outer 60% of catalyst volume, and (iv) particles of the catalyst have an average diameter from 200 microns to 30 mm; wherein weight percentages are based on weight of the catalyst.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: November 15, 2022
    Assignees: Rohm and Haas Company, Dow Global Technologies LLC
    Inventors: Kirk W. Limbach, Christopher D. Frick, Dmitry A. Krapchetov, Wen-Sheng Lee, Victor J. Sussman, Jeffrey A. Herron
  • Publication number: 20220355281
    Abstract: Embodiments of the present disclosure are directed towards methods of etherification including modifying a zeolite catalyst with phosphorus to provide a phosphorus modified zeolite catalyst; and contacting the phosphorus modified zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether.
    Type: Application
    Filed: September 23, 2020
    Publication date: November 10, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Wen-Sheng Lee, Dean Millar, Stephen W. King
  • Publication number: 20220298093
    Abstract: Embodiments of the present disclosure are directed towards methods of etherification including reducing templates of a zeolite catalyst to provide a reduced template zeolite catalyst having from 3 to 15 weight percent weight percent of templates maintained following calcination of zeolite catalyst; and contacting the reduced template zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether.
    Type: Application
    Filed: September 23, 2020
    Publication date: September 22, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Wen-Sheng Lee, Beata A. Kilos, Sung-Yu Ku, Stephen W. King
  • Publication number: 20220281792
    Abstract: Embodiments of the present disclosure are directed towards methods of etherification including modifying a zeolite catalyst with silica to provide a silica modified zeolite catalyst; and contacting the silica modified zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether.
    Type: Application
    Filed: September 23, 2020
    Publication date: September 8, 2022
    Applicant: Dow Global Technologies LLC
    Inventors: Wen-Sheng Lee, Sung-Yu Ku, Stephen W. King
  • Publication number: 20220274903
    Abstract: A method including the step contacting an olefin, an alcohol, a metallosilicate catalyst and a solvent, wherein the solvent comprises structure (I): wherein R1 and R2 are each selected from the group consisting of an aryl group and an alkyl group with the proviso that at least one of R1 and R2 is an aryl group, further wherein n is 1-3.
    Type: Application
    Filed: September 29, 2020
    Publication date: September 1, 2022
    Inventors: Wen-Sheng Lee, Mingzhe Yu, Jing L. Houser, Sung-Yu Ku, Wanglin Yu, Stephen W. King, Paulami Majumdar, Le Wang
  • Publication number: 20220266238
    Abstract: According to a least one feature of the present disclosure, a method includes the steps: (a) providing a metallosilicate catalyst that has been used to catalyze a chemical reaction; and (b) heating the metallosilicate catalyst to a temperature from 200° C. to 425° C. for a period of 0.5 hours to 5 hours.
    Type: Application
    Filed: September 29, 2020
    Publication date: August 25, 2022
    Inventors: Wen -Sheng Lee, Mingzhe Yu, Thomas H. Peterson, Sung-Yu Ku, Wanglin Yu, Le Wang, Stephen W. King
  • Publication number: 20220258142
    Abstract: A method includes the steps of (a) contacting a solvent having a Water Solubility of 1 g or greater per 100 g of water with a metallosilicate catalyst having an alumina to silica ratio from 5 to 1500; and (b) heating the metallosilicate catalyst to a temperature from 125 C to 300 C fora period of 0.5 hours to 5 hours.
    Type: Application
    Filed: September 29, 2020
    Publication date: August 18, 2022
    Inventors: Wen-Sheng Lee, Le Wang, Thomas H. Peterson, Sung-Yu Ku, Wanglin Yu, Stephen W. King