Patents by Inventor Zhenli Wei

Zhenli Wei 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).

  • Hydrogenation of nitrile rubber
    Patent number: 10000584
    Abstract: This invention relates to a novel process for selectively hydrogenating nitrile rubbers in the presence of specific Ruthenium based complex catalysts without simultaneous molecular weight degradation by a metathetic reaction.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: June 19, 2018
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Qingchun Liu, Zhenli Wei, Martin Hoch
  • Ruthenium- or osmium-based complex catalysts
    Patent number: 9802972
    Abstract: The present invention provides novel ruthenium or osmium based complex structures with a unique combination of ligands comprising a Schiff-base type ligand, a N-heterocyclic carbene ligand and a CO ligand which can be prepared according to two different routes involving easily accessible starting materials and which represent excellent catalysts for hydrogenating unsaturated compounds, oligomers and polymers, in particular at unforeseeably low temperatures.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: October 31, 2017
    Assignee: ARLANXEO DEUTSCHLAND GMBH
    Inventors: Zhenli Wei, Qingchun Liu
  • Catalyst compositions and their use for hydrogenation of nitrile rubber
    Patent number: 9605088
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: March 28, 2017
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Qingchun Liu, Zhenli Wei
  • Catalyst compositions and their use for hydrogenation of nitrile rubber
    Patent number: 9598506
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: March 21, 2017
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Qingchun Liu, Zhenli Wei
  • Hydrogenation of diene-based polymers
    Patent number: 9371403
    Abstract: This invention relates to a process for the hydrogenation of diene-based copolymers in the presence of catalysts on specific carrier materials containing at least one hyper-branched polymer.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: June 21, 2016
    Assignee: LANXESS Deutschland GmbH
    Inventors: Matthias Soddemann, Sharon Guo, Zhenli Wei
  • RUTHENIUM- OR OSMIUM-BASED COMPLEX CATALYSTS
    Publication number: 20160122376
    Abstract: The present invention provides novel ruthenium or osmium based complex structures with a unique combination of ligands comprising a Schiff-base type ligand, a N-heterocyclic carbene ligand and a CO ligand which can be prepared according to two different routes involving easily accessible starting materials and which represent excellent catalysts for hydrogenating unsaturated compounds, oligomers and polymers, in particular at unforeseeably low temperatures.
    Type: Application
    Filed: June 6, 2014
    Publication date: May 5, 2016
    Inventors: Zhenli WEI, Qingchun LIU
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    Publication number: 20150166686
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
    Type: Application
    Filed: October 19, 2012
    Publication date: June 18, 2015
    Inventors: Qingchun Liu, Zhenli Wei
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    Publication number: 20150126683
    Abstract: This invention relates to novel catalyst compositions based on ruthenium or osmium carbene-complex catalysts, pref. of the Grubbs-I, -II or -III type or fluorenylidene analogues thereof, and terminal olefins, pref. enol ethers such as ethyl vinyl ether (EVE or VEE) as co-catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, pref. with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.
    Type: Application
    Filed: October 19, 2012
    Publication date: May 7, 2015
    Applicant: LANXESS Deutschland GmbH
    Inventors: Werner Obrecht, Sarah David, Qingchun Liu, Zhenli Wei
  • HYDROGENATION OF NITRILE RUBBER
    Publication number: 20150119530
    Abstract: This invention relates to a novel process for selectively hydrogenating nitrile rubbers in the presence of specific Ruthenium based complex catalysts without simultaneous molecular weight degradation by a metathetic reaction.
    Type: Application
    Filed: April 26, 2013
    Publication date: April 30, 2015
    Inventors: Qingchun Liu, Zhenli Wei, Martin Hoch
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    Publication number: 20150025199
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts of the Grubbs-Hoveyda, Grela or Zhan type and specific co-catalysts comprising at least one vinyl group, pref. ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.
    Type: Application
    Filed: October 19, 2012
    Publication date: January 22, 2015
    Inventors: Werner Obrecht, Sarah David, Qingchun Liu, Zhenli Wei
  • CATALYST COMPOSITIONS AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER
    Publication number: 20140249277
    Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.
    Type: Application
    Filed: October 19, 2012
    Publication date: September 4, 2014
    Inventors: Qingchun Liu, Zhenli Wei
  • HYDROGENATION OF DIENE-BASED POLYMERS
    Publication number: 20130331524
    Abstract: This invention relates to a process for the hydrogenation of diene-based copolymers in the presence of catalysts on specific carrier materials containing at least one hyper-branched polymer.
    Type: Application
    Filed: July 27, 2011
    Publication date: December 12, 2013
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Matthias Soddemann, Sharon Guo, Zhenli Wei
  • Hydrogenation of diene-based polymer latex
    Patent number: 7803883
    Abstract: The present invention relates to a process for the selective hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex using a water-soluble catalyst and simultaneously a water-insoluble co-catalyst.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 28, 2010
    Assignee: LANXESS Inc.
    Inventors: Qinmin Pan, Garry Rempel, Zhenli Wei
  • Hydrogenation of diene-based polymer latex
    Patent number: 7799872
    Abstract: The present invention relates to a process for the hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex in the absence of any organic solvent by a catalytically active system prepared in-situ based on a first main catalyst component and a secondary water-insoluble catalyst component.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 21, 2010
    Assignee: LANXESS Inc.
    Inventors: Qinmin Pan, Garry Rempel, Zhenli Wei
  • HYDROGENATION OF DIENE-BASED POLYMER LATEX
    Publication number: 20090258996
    Abstract: The present invention relates to a process for the selective hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex using a water-soluble catalyst and simultaneously a water-insoluble co-catalyst.
    Type: Application
    Filed: December 16, 2008
    Publication date: October 15, 2009
    Applicant: LANXESS INC.
    Inventors: Qinmin PAN, Garry REMPEL, Zhenli Wei