Patents by Inventor Zhekai Zhang

Zhekai 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).

  • Method for separating oil-water two-phase NMR signals by using dynamic nuclear polarization
    Patent number: 11953456
    Abstract: A method for separating oil-water two-phase NMR signals by using dynamic nuclear polarization comprising: using a combination of a non-selective free radical and a selective relaxation reagent to selectively enhance an NMR signal of an oil phase or a water phase, the relaxation reagent being capable of selectively suppressing dynamic polarization enhancement of the water phase or oil phase, thus achieving the polarization enhancement of a single fluid phase in the mixed fluid phases and realizing separation of the two-phase signals; or using a selective free radical to selectively enhance the NMR signal of the oil phase or the water phase, thus achieving the polarization enhancement of a single fluid phase in the mixed fluid phases and realizing separation of the oil-water two-phase NMR signals. The method is simple and easy to operate, has a short test time, and can efficiently separate NMR signals of oil and water phases.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: April 9, 2024
    Assignee: Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences
    Inventors: Chaoyang Liu, Junfei Chen, Li Chen, Jiwen Feng, Zhen Zhang, Zhekai Zhang, Fang Chen
  • METHOD FOR SEPARATING OIL-WATER TWO-PHASE NMR SIGNALS BY USING DYNAMIC NUCLEAR POLARIZATION
    Publication number: 20220057347
    Abstract: A method for separating oil-water two-phase NMR signals by using dynamic nuclear polarization comprising: using a combination of a non-selective free radical and a selective relaxation reagent to selectively enhance an NMR signal of an oil phase or a water phase, the relaxation reagent being capable of selectively suppressing dynamic polarization enhancement of the water phase or oil phase, thus achieving the polarization enhancement of a single fluid phase in the mixed fluid phases and realizing separation of the two-phase signals; or using a selective free radical to selectively enhance the NMR signal of the oil phase or the water phase, thus achieving the polarization enhancement of a single fluid phase in the mixed fluid phases and realizing separation of the oil-water two-phase NMR signals. The method is simple and easy to operate, has a short test time, and can efficiently separate NMR signals of oil and water phases.
    Type: Application
    Filed: November 5, 2021
    Publication date: February 24, 2022
    Inventors: Chaoyang Liu, Junfei Chen, Li Chen, Jiwen Feng, Zhen Zhang, Zhekai Zhang, Fang Chen