Patents by Inventor Xiawei Zhang

Xiawei Zhang 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: 11618732
    Abstract: A process for the synthesis of N-alkylated lactams via reductive alkylation. The process of the present disclosure may be conducted by the addition of an aldehyde to a lactam in the presence of a catalyst under a reducing atmosphere.
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: April 4, 2023
    Assignee: AdvanSix Resins & Chemical LLC
    Inventors: Xiawei Zhang, Robert Schutter, Jr., Lihao Tang, Scott Keenan, Xin Li
  • Publication number: 20210179562
    Abstract: A process for the synthesis of N-alkylated lactams via reductive alkylation. The process of the present disclosure may be conducted by the addition of an aldehyde to a lactam in the presence of a catalyst under a reducing atmosphere.
    Type: Application
    Filed: December 8, 2020
    Publication date: June 17, 2021
    Inventors: Xiawei Zhang, Robert Schutter, JR., Lihao Tang, Scott Keenan, Xin Li
  • Publication number: 20190075787
    Abstract: A composition including a caprolactam-derived solvent and a crop protective active ingredient. An emulsifiable concentrate including a caprolactam-derived solvent, an organic co-solvent, an emulsifier, and a crop protective active ingredient is also provided.
    Type: Application
    Filed: September 13, 2018
    Publication date: March 14, 2019
    Inventors: Edward Asirvatham, Robert W. Emblidge, Kristi Engelman, Jaime A. Flores-Vasquez, Kevin Kashurba, Scott R. Keenan, James A. Kweeder, Venkata Krishna Sai Pappu, Lihao Tang, Xiawei Zhang
  • Patent number: 8961822
    Abstract: A bleaching composition comprising a peroxy compound and one or more activator present in an effective amount to activate the peroxy compound, present in an amount effective to accomplish bleaching or cleaning or oxidation. The activator is a metallocarbene of the general structure (XX?C)yMLn? where M represents a metal center, C represents the carbene carbon bound to the metal center, X and X? may be the same or different and may furthermore be part of a cyclic structure, Ln? represents one or more other ligands which may or may not include one or more metal centers, and where y?1.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: February 24, 2015
    Assignee: Arkema Inc.
    Inventors: Michael B. Abrams, Xiawei Zhang
  • Publication number: 20130143786
    Abstract: The present invention is directed towards cleaning composition and/or formulations of commercial cleaning products containing beneficial metallocarbene activators for peroxygen species. The cleaning compositions and/or formulations include a bleaching component comprising a peroxy compound and one or more activators present in an effective amount to activate the peroxy compound to accomplish bleaching or cleaning or oxidation. The activator is a metallocarbene of the general structure (XX?C)yMLn? where M represents a metal center, C represents the carbene carbon bound to the metal center, X and X? may be the same or different and may furthermore be part of a cyclic structure, Ln? represents one or more other ligands which may or may not include one or more metal centers, and where y greater than equal to I.
    Type: Application
    Filed: May 18, 2011
    Publication date: June 6, 2013
    Applicant: Arkema Inc.
    Inventors: Shui-Ping Zhu, Michael B. Abrams, Xiawei Zhang, Xue Wang
  • Patent number: 8414793
    Abstract: A bleaching composition comprising a peroxy compound and one or more activator present in an effective amount to activate the peroxy compound, present in an amount effective to accomplish bleaching or cleaning or oxidation. The activator is a metallocarbene of the general structure (XX?C)yMLn? where M represents a metal center, C represents the carbene carbon bound to the metal center, X and X? may be the same or different and may furthermore be part of a cyclic structure, Ln? represents one or more other ligands which may or may not include one or more metal centers, and where y>1.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 9, 2013
    Assignee: Arkema Inc.
    Inventors: Michael B. Abrams, Xiawei Zhang
  • Publication number: 20110147654
    Abstract: A bleaching composition comprising a peroxy compound and one or more activator present in an effective amount to activate the peroxy compound, present in an amount effective to accomplish bleaching or cleaning or oxidation. The activator is a metallocarbene of the general structure (XX?C)yMLn? where M represents a metal center, C represents the carbene carbon bound to the metal center, X and X? may be the same or different and may furthermore be part of a cyclic structure, Ln? represents one or more other ligands which may or may not include one or more metal centers, and where y>1.
    Type: Application
    Filed: May 12, 2009
    Publication date: June 23, 2011
    Applicant: Arkema Inc.
    Inventors: Michael B. Abrams, Xiawei Zhang