Patents by Inventor Yanmin XIA

Yanmin XIA 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).

  • Polyacrylamide-based symmetric branched polymer surfactant and a process for preparing the same and use thereof
    Patent number: 12331246
    Abstract: A polyacrylamide-based symmetric branched polymer surfactant and a process for preparing the same and use thereof are provided. The surfactant has an acrylamide structure unit, an anionic monomer structure unit, an optional non-ionic monomer structure unit, a branched structure unit, and an optional cationic monomer structure unit. The branched structure unit has at least one of structures represented by formula (1) or formula (2): The polymer surfactant can realize both the high viscosity of the aqueous solution and the low oil water interfacial tension, and can be used as the oil displacement agent in the tertiary oil recovery.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: June 17, 2025
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC
    Inventors: Zhiqing Su, Yingcheng Li, Yanmin Xia, Hui Sun, Hui Xu, Yixing Zhu, Lan Wang
  • POLYACRYLAMIDE-BASED SYMMETRIC BRANCHED POLYMER SURFACTANT AND A PROCESS FOR PREPARING THE SAME AND USE THEREOF
    Publication number: 20230392069
    Abstract: A polyacrylamide-based symmetric branched polymer surfactant and a process for preparing the same and use thereof are provided. The surfactant has an acrylamide structure unit, an anionic monomer structure unit, an optional non-ionic monomer structure unit, a branched structure unit, and an optional cationic monomer structure unit. The branched structure unit has at least one of structures represented by formula (1) or formula (2): The polymer surfactant can realize both the high viscosity of the aqueous solution and the low oil water interfacial tension, and can be used as the oil displacement agent in the tertiary oil recovery.
    Type: Application
    Filed: October 26, 2021
    Publication date: December 7, 2023
    Inventors: Zhiqing SU, Yingcheng LI, Yanmin XIA, Hui SUN, Hui XU, Yixing ZHU, Lan WANG