Patents by Inventor Patricia Cheung

Patricia Cheung 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: 20230312443
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3.
    Type: Application
    Filed: May 25, 2023
    Publication date: October 5, 2023
    Inventors: Patricia Cheung, Concetta Lamarca
  • Patent number: 11702378
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: July 18, 2023
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Patricia Cheung, Concetta Lamarca
  • Publication number: 20220002219
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3.
    Type: Application
    Filed: September 20, 2021
    Publication date: January 6, 2022
    Inventors: Patricia CHEUNG, Concetta LAMARCA
  • Patent number: 11124469
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: September 21, 2021
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Patricia Cheung, Concetta Lamarca
  • Publication number: 20200239392
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 30, 2020
    Inventors: Patricia CHEUNG, Concetta LAMARCA
  • Patent number: 10654777
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z—CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: May 19, 2020
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Ivan Sergeyevich Baldychev, Stephan M Brandstadter, Patricia Cheung, Mario Joseph Nappa
  • Patent number: 10633311
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3. Also disclosed is a hydrogenation process comprising reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, characterized by: the palladium catalyst consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: April 28, 2020
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Patricia Cheung, Concetta Lamarca
  • Publication number: 20190248719
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z—CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 15, 2019
    Inventors: IVAN SERGEYEVICH BALDYCHEV, STEPHAN M. BRANDSTADTER, PATRICIA CHEUNG, MARIO JOSEPH NAPPA
  • Publication number: 20190194098
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3. Also disclosed is a hydrogenation process comprising reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, characterized by: the palladium catalyst consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.
    Type: Application
    Filed: March 4, 2019
    Publication date: June 27, 2019
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventors: Patricia CHEUNG, Concetta LAMARCA
  • Patent number: 10227276
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: March 12, 2019
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Ivan Sergeyevich Baldychev, Stephan M. Brandstadter, Patricia Cheung, Mario Joseph Nappa
  • Patent number: 10221113
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3. Also disclosed is a hydrogenation process comprising reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, characterized by: the palladium catalyst consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: March 5, 2019
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Patricia Cheung, Concetta Lamarca
  • Publication number: 20180362421
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Application
    Filed: August 23, 2018
    Publication date: December 20, 2018
    Inventors: IVAN SERGEYEVICH BALDYCHEV, STEPHAN M. BRANDSTADTER, PATRICIA CHEUNG, MARIO JOSEPH NAPPA
  • Patent number: 10099976
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: October 16, 2018
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Ivan Sergeyevich Baldychev, Stephan M Brandstadter, Patricia Cheung, Mario Joseph Nappa, Sheng Peng, Donald J Toton
  • Publication number: 20170369403
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Application
    Filed: September 8, 2017
    Publication date: December 28, 2017
    Inventors: IVAN SERGEYEVICH BALDYCHEV, STEPHAN M. BRANDSTADTER, PATRICIA CHEUNG, MARIO JOSEPH NAPPA, SHENG PENG, DONALD J. TOTON
  • Patent number: 9758452
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: September 12, 2017
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Ivan Sergeyevich Baldychev, Stephan M Brandstadter, Patricia Cheung, Mario Joseph Nappa
  • Publication number: 20170129832
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3. Also disclosed is a hydrogenation process comprising reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, characterized by: the palladium catalyst consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.
    Type: Application
    Filed: January 26, 2017
    Publication date: May 11, 2017
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventors: Patricia CHEUNG, Concetta LAMARCA
  • Patent number: 9598336
    Abstract: A hydrogenation process is disclosed. The process involves reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, wherein the palladium catalyst comprises palladium supported on a carrier wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the carrier. Also disclosed is a palladium catalyst composition consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.2 wt % based on the total weight of the palladium and the ?-Al2O3. Also disclosed is a hydrogenation process comprising reacting a fluoroolefin with H2 in a reaction zone in the presence of a palladium catalyst to produce a hydrofluoroalkane product, characterized by: the palladium catalyst consisting essentially of palladium supported on ?-Al2O3 wherein the palladium concentration is from about 0.001 wt % to about 0.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: March 21, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Patricia Cheung, Allen Capron Sievert, Concetta Lamarca
  • Publication number: 20160347694
    Abstract: Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz.
    Type: Application
    Filed: February 6, 2015
    Publication date: December 1, 2016
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventors: IVAN SERGEYEVICH BALDYCHEV, STEPHAN M. BRANDSTADTER, PATRICIA CHEUNG, MARIO JOSEPH NAPPA, SHENG PENG, DONALD J. TOTON
  • Patent number: 8853472
    Abstract: A process is disclosed for reducing the amount of monofluoroacetate. The process involves (a) contacting a hydrofluorocarbon with a reactant basic aqueous solution to produce an organic phase solution containing a hydrofluoroolefin and an aqueous phase solution containing a monofluoroacetate; and (b) heating the aqueous phase solution to an effective temperature to reduce the amount of monofluoroacetate in the aqueous phase solution, wherein fluoride concentration in the aqueous phase solution is substantially high. Another process is disclosed for reducing the amount of monofluoroacetate.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: October 7, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mario Joseph Nappa, Patricia Cheung, Karl R. Krause, Michael A. Sisk
  • Publication number: 20140273105
    Abstract: Lignocellulosic biomass pretreated with ammonia where the concentration of the biomass in the reaction mixture is reduced over time was found to produce more sugars following saccharification, as compared to equivalent biomass pretreated at constant concentration. The concentration of biomass is a solids concentration, which is the percent of dry biomass relative to the total pretreatment reaction mixture on a weight to weight basis.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 18, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: PATRICIA CHEUNG, BRADLEY CURT FOX, MING WOEI LAU, JOSEPH MICHAEL SELBY, GREGORY PAUL SHANKWITZ, STUART M THOMAS, RYAN ERIC WARNER