Patents by Inventor Lihao Tang

Lihao Tang 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: 9738608
    Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a formula (IV) wherein n is 1, 2 or 4 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a formula (V) wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a formula (VI) wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: August 22, 2017
    Assignee: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
  • Patent number: 9518023
    Abstract: Lactamium based ionic liquids and methods of making them are described. The ionic liquids comprise at least one of: the reaction product of a lactam compound having a general formula wherein the ring has at least one C?C double bond, or and a Brønsted acid HX; or a Brønsted acid HX where X is a halide, and a metal halide.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: December 13, 2016
    Assignee: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
  • Publication number: 20160075659
    Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a formula (IV) wherein n is 1, 2 or 4 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a formula (V) wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a formula (VI) wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brøsted acid HX; or a Brøsted acid HX, where X is a halide, and a metal halide.
    Type: Application
    Filed: November 30, 2015
    Publication date: March 17, 2016
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
  • Patent number: 9233928
    Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a general formula wherein n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a general formula wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a general formula wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: January 12, 2016
    Assignee: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
  • Publication number: 20150322016
    Abstract: Lactamium based ionic liquids are described. They comprise at least one of: the reaction product of a lactam compound having a general formula wherein n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; where the reaction product is p-toluenesulfonate, halide, or the halometallate; or the reaction product of a lactam compound having a general formula wherein the ring has at least C—C one double bond, and n is 1 to 8, and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide; or the reaction product of a lactam compound having a general formula wherein n is 1 to 8, m is 1 to 8, and the rings can be saturated or unsaturated; and a Brønsted acid HX; or a Brønsted acid HX, where X is a halide, and a metal halide.
    Type: Application
    Filed: May 6, 2014
    Publication date: November 12, 2015
    Applicant: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
  • Publication number: 20150322017
    Abstract: Lactamium based ionic liquids and methods of making them are described. The ionic liquids comprise at least one of: the reaction product of a lactam compound having a general formula wherein the ring has at least one C—C double bond, or and a Brønsted acid HX; or a Brønsted acid HX where X is a halide, and a metal halide.
    Type: Application
    Filed: May 6, 2014
    Publication date: November 12, 2015
    Applicant: UOP LLC
    Inventors: Erin M. Broderick, Alakananda Bhattacharyya, Alan B. Levy, Lihao Tang
  • Patent number: 8709236
    Abstract: A process for removing a nitrogen compound from a fuel feed, such as vacuum gas oil or diesel fuel, wherein the process includes contacting the fuel feed comprising the nitrogen compound with a fuel-immiscible caprolactamium ionic liquid to produce a fuel and fuel-immiscible caprolactamium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil or a diesel effluent having a reduced nitrogen content relative to the vacuum gas oil or diesel feed. The invention provides an alternate use for caprolactamium ionic liquid that is produced in large quantities for the manufacture of caprolactam.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: April 29, 2014
    Assignee: UOP LLC
    Inventors: Manuela Serban, Alan B. Levy, Lihao Tang, Alakananda Bhattacharyya
  • Publication number: 20130248423
    Abstract: A process for removing a nitrogen compound from a fuel feed, such as vacuum gas oil or diesel fuel, wherein the process includes contacting the fuel feed comprising the nitrogen compound with a fuel-immiscible caprolactamium ionic liquid to produce a fuel and fuel-immiscible caprolactamium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil or a diesel effluent having a reduced nitrogen content relative to the vacuum gas oil or diesel feed. The invention provides an alternate use for caprolactamium ionic liquid that is produced in large quantities for the manufacture of caprolactam.
    Type: Application
    Filed: March 26, 2012
    Publication date: September 26, 2013
    Applicant: UOP LLC
    Inventors: Manuela Serban, Alan B. Levy, Lihao Tang, Alakananda Bhattacharyya
  • Patent number: 8273678
    Abstract: The reaction product of the reaction product of A.) a ligand of the formula (I), wherein R1, R2, R3, and R4 in each occurrence independently are the same or different hydrocarbyl substituents of 1 to 20 carbon atoms, hydrogen, halogen, or alkoxy groups of 1 to 8 carbon atoms; X in each occurrence independently is CR6 with R6 being hydrogen or an alkyl group of 1 to 8 carbon atoms; and R5 is an organic divalent group of 4 to 40 carbon atoms with the proviso that the two nodes X are not bound to the same atom or to vicinal atoms in the group R5; B.) an aluminum compound of the formula AlR7R8R9, wherein R7, R8 and R9 each independently is a C1 to C12 hydrocarbyl group, hydrogen, halogen, or an alkoxy group of 1 to 20 carbon atoms; and C.) a Lewis base selected from the group consisting of amines, phosphines, amides, nitriles, isonitriles, and alcohols is useful as a polymerization catalyst, particularly for the homopolymerization or copolymerization of an alkylene oxide.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: September 25, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Eric P. Wasserman, Yang Cheng, Lihao Tang
  • Publication number: 20100197873
    Abstract: The reaction product of the reaction product of A.) a ligand of the formula (I), wherein R1, R2, R3, and R4 in each occurrence independently are the same or different hydrocarbyl substituents of 1 to 20 carbon atoms, hydrogen, halogen, or alkoxy groups of 1 to 8 carbon atoms; X in each occurrence independently is CR6 with R6 being hydrogen or an alkyl group of 1 to 8 carbon atoms; and R5 is an organic divalent group of 4 to 40 carbon atoms with the proviso that the two nodes X are not bound to the same atom or to vicinal atoms in the group R5; B.) an aluminum compound of the formula AlR7R8R9, wherein R7, R8 and R9 each independently is a C1 to C12 hydrocarbyl group, hydrogen, halogen, or an alkoxy group of 1 to 20 carbon atoms; and C.) a Lewis base selected from the group consisting of amines, phosphines, amides, nitriles, isonitriles, and alcohols is useful as a polymerization catalyst, particularly for the homopolymerization or copolymerization of an alkylene oxide.
    Type: Application
    Filed: February 28, 2008
    Publication date: August 5, 2010
    Inventors: Eric P. Wasserman, Yang Cheng, Lihao Tang