Patents by Inventor Xiaoliang Gao

Xiaoliang Gao 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).

  • Patent number: 11230512
    Abstract: This document relates to oxidative dehydrogenation catalysts that include molybdenum, vanadium, and oxygen.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: January 25, 2022
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Marie Barnes, Vasily Simanzhenkov, Elena Sebastiao, David Sullivan, Yoonhee Kim
  • Patent number: 11167267
    Abstract: Oxidative dehydrogenation catalysts including mixed oxides of Mo, V, Nb, Te, and optionally a promoter may be dissolved in aqueous solutions of oxalic acid. This permits the removal of catalyst and catalyst residues from reactors for the oxidative dehydrogenation of paraffins and particularly ethane.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: November 9, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Vasily Simanzhenkov, Shahin Goodarznia, Marie Barnes, David Sullivan
  • Publication number: 20210237036
    Abstract: Mixed metal oxide catalysts having an amorphous content of not less than 40 wt. % are prepared by calcining the catalyst precursor fully or partially enclosed by a porous material having a melting temperature greater than 600° C. in an inert container including heating the catalyst precursor at a rate from 0.5 to 10° C. per minute from room temperature to a temperature from 370° C. to 540° C. under a stream of pre heated gas chosen from steam and inert gas and mixtures thereof at a pressure of greater than or equal to 1 psig having a temperature from 300° C. to 540° C. and holding the catalyst precursor at that temperature for at least 2 hours and cooling the catalyst precursor to room temperature.
    Type: Application
    Filed: April 21, 2021
    Publication date: August 5, 2021
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Yipei Styles, Yoonhee Kim, Hanna Drag, Marie Barnes
  • Patent number: 11077430
    Abstract: Oxidative dehydrogenation catalysts comprising MoVNbTeO having improved consistency of composition and a 25% conversion of ethylene at less than 420° C. and a selectivity to ethylene above 95% are prepared by treating the catalyst precursor with H2O2 in an amount equivalent to 0.30-2.8 mL H2O2 of a 30% solution per gram of catalyst precursor prior to calcining.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: August 3, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Hanna Drag, Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina
  • Patent number: 11052380
    Abstract: Oxidative dehydrogenation catalysts for converting lower paraffins to alkenes such as ethane to ethylene when prepared as an agglomeration, for example extruded with supports chosen from slurries of TiO2, ZrO2 Al2O3, AlO(OH) and mixtures thereof have a lower temperature at which 25% conversion is obtained.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: July 6, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Yoonhee Kim, Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Marie Annette Barnes, Renee Laurel Anseeuw, Yipei Styles
  • Publication number: 20210154645
    Abstract: Oxidative dehydrogenation catalysts for converting lower paraffins to alkenes such as ethane to ethylene when prepared as an agglomeration, for example extruded with supports comprising slurries of Nb2O5.
    Type: Application
    Filed: February 3, 2021
    Publication date: May 27, 2021
    Inventors: Xiaoliang Gao, Marie Annette Barnes, Yoonhee Kim, Vasily Simanzhenkov, David Sullivan, Renee Laurel Anseeuw, Yipei Styles
  • Patent number: 11014072
    Abstract: Mixed metal oxide catalysts having an amorphous content of not less than 40 wt. % are prepared by calcining the catalyst precursor fully or partially enclosed by a porous material having a melting temperature greater than 600° C. in an inert container including heating the catalyst precursor at a rate from 0.5 to 10° C. per minute from room temperature to a temperature from 370° C. to 540° C. under a stream of pre heated gas chosen from steam and inert gas and mixtures thereof at a pressure of greater than or equal to 1 psig having a temperature from 300° C. to 540° C. and holding the catalyst precursor at that temperature for at least 2 hours and cooling the catalyst precursor to room temperature.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: May 25, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Yipei Styles, Yoonhee Kim, Hanna Drag, Marie Barnes
  • Patent number: 10940461
    Abstract: Oxidative dehydrogenation catalysts for converting lower paraffins to alkenes such as ethane to ethylene when prepared as an agglomeration, for example extruded with supports comprising slurries of Nb2O5.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: March 9, 2021
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Marie Annette Barnes, Yoonhee Kim, Vasily Simanzhenkov, David Sullivan, Renee Laurel Anseeuw, Yipei Styles
  • Publication number: 20200407289
    Abstract: A method of converting one or more alkanes to one or more alkenes that includes a) providing a first stream containing one or more alkanes and oxygen to an oxidative dehydrogenation reactor; b) converting at least a portion of the one or more alkanes to one or more alkenes in the oxidative dehydrogenation reactor to provide a second stream exiting the oxidative dehydrogenation reactor containing one or more alkanes, one or more alkenes, oxygen, carbon monoxide and optionally acetylene; and c) providing the second stream to a second reactor containing a catalyst that includes a group 11 metal to convert a least a portion of the carbon monoxide to carbon dioxide and reacting the acetylene.
    Type: Application
    Filed: March 8, 2019
    Publication date: December 31, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Shahin Goodarznia, Kamal Serhal, Xiaoliang Gao, Yoonhee Kim
  • Publication number: 20200282383
    Abstract: Oxidative dehydrogenation catalysts comprising MoVNbTeO having improved consistency of composition and a 25% conversion of ethylene at less than 420° C. and a selectivity to ethylene above 95% are prepared by treating the catalyst precursor with H2O2 in an amount equivalent to 0.30-2.8 mL H2O2 of a 30% solution per gram of catalyst precursor prior to calcining.
    Type: Application
    Filed: May 21, 2020
    Publication date: September 10, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Hanna Drag, Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina
  • Publication number: 20200246782
    Abstract: The preparation of an oxidative dehydrogenation catalyst comprising Mo, V, Nb and Te using a hydrothermal step. In some embodiments, the activity and reproducibility of the catalyst is improved by conducting the hydrothermal step while permitting gaseous products to leave the reactor. In some instances a condenser may be upstream of the outlet of the reactor.
    Type: Application
    Filed: April 24, 2020
    Publication date: August 6, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan
  • Patent number: 10730036
    Abstract: A process for preparing an oxidative dehydrogenation catalyst or oxidative dehydrogenation catalyst precursor that includes mixing solutions of molybdenum and tellurium at a pH from about 3.3 to 7.5; adjusting the pH of the resulting solution back to about 5 and adding VOSO4 and adding a solution of Nb2O5 and oxalic acid and treating the resulting precursor slurry in a controlled pressure hydrothermal process to obtain the catalyst.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 4, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Xiaoliang Gao, Vasily Simanzhenkov, Marie Barnes, David Sullivan, Hanna Drag, Yoonhee Kim, Perry de Wit
  • Publication number: 20200238260
    Abstract: Oxidative dehydrogenation catalysts for converting lower paraffins to alkenes such as ethane to ethylene when prepared as an agglomeration, for example extruded with supports chosen from slurries of TiO2, ZrO2 Al2O3, AlO(OH) and mixtures thereof have a lower temperature at which 25% conversion is obtained.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Yoonhee Kim, Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Marie Annette Barnes, Renee Laurel Anseeuw, Yipei Styles
  • Patent number: 10695754
    Abstract: Oxidative dehydrogenation catalysts comprising MoVNbTeO having improved consistency of composition and a 25% conversion of ethylene at less than 420° C. and a selectivity to ethylene above 95% are prepared by treating the catalyst precursor with H2O2 in an amount equivalent to 0.30-2.8 mL H2O2 of a 30% solution per gram of catalyst precursor prior to calcining.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: June 30, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan, Hanna Drag, Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina
  • Publication number: 20200171468
    Abstract: A catalyst for oxidative dehydrogenation (ODH) of ethane with an empirical formula Mo—V—Te—Nb—Pd—O produced using a process comprising impregnation of the Pd component on the surface of the catalyst following a calcination step using a Pd compound free of halogens. The resulting catalyst can be used in both diluted and undiluted ODH processes and shows higher than expected activity without any loss of selectivity.
    Type: Application
    Filed: January 20, 2020
    Publication date: June 4, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan, Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina
  • Publication number: 20200171469
    Abstract: A catalyst for oxidative dehydrogenation (ODH) of ethane with an empirical formula Mo—V—Te—Nb—Pd—O produced using a process comprising impregnation of the Pd component on the surface of the catalyst following a calcination step using a Pd compound free of halogens. The resulting catalyst can be used in both diluted and undiluted ODH processes and shows higher than expected activity without any loss of selectivity.
    Type: Application
    Filed: January 20, 2020
    Publication date: June 4, 2020
    Applicant: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan, Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina
  • Patent number: 10668454
    Abstract: The preparation of an oxidative dehydrogenation catalyst comprising Mo, V, Nb and Te using a hydrothermal step. In some embodiments, the activity and reproducibility of the catalyst is improved by conducting the hydrothermal step while permitting gaseous products to leave the reactor. In some instances a condenser may be upstream of the outlet of the reactor.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: June 2, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan
  • Patent number: 10661256
    Abstract: Oxidative dehydrogenation catalysts for converting lower paraffins to alkenes such as ethane to ethylene when prepared as an agglomeration, for example extruded with supports chosen from slurries of TiO2, ZrO2 Al2O3, AlO(OH) and mixtures thereof have a lower temperature at which 25% conversion is obtained.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: May 26, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Yoonhee Kim, Vasily Simanzhenkov, Xiaoliang Gao, David Sullivan, Marie Annette Barnes, Renee Laurel Anseeuw, Yipei Styles
  • Patent number: 10626066
    Abstract: Ethane may be catalytically oxidatively dehydrogenated to ethylene at high conversions and high selectivity in a circulating fluidized bed (CFB) reactor in the presence of oxygen in the feed in an amount above the flammability limit. The reactor has an attached regeneration reactor to regenerate the catalyst and cycle back to the CFB.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: April 21, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Shahin Goodarznia, Xiaoliang Gao, Kamal Serhal, Leonid Kustov, Aleksey Kucherov, Elena Finashina
  • Patent number: 10589258
    Abstract: The preparation of an oxidative dehydrogenation catalyst comprising Mo, V, Nb and Te using a hydrothermal step the activity and reproducibility of the catalyst is improved by conduction the hydrothermal step at higher pressures while permitting gaseous products to leave the reactor. In some instances a condenser may be upstream of the pressure relief valve.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: March 17, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Vasily Simanzhenkov, Xiaoliang Gao, David Jeffrey Sullivan, Hanna Drag, Marie Annette Barnes