Patents by Inventor Yunbiao QI

Yunbiao QI 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).

  • Synthesis method and device for rapidly producing lactide at high yield
    Patent number: 11926608
    Abstract: The invention discloses a synthesis method and device for rapidly producing lactide at high yield. The method comprises: adding a single component of lactic acid or two components of lactic acid and catalyst, passing the mixture through a mixer to enter an oligomer preparation system, increasing a residence time through bottom circulation, synthesizing oligomeric lactic acid, and passing a gas-phase component through a rectification system. With the adoption of the device, the lactide is capable of being efficiently synthesized, crude lactide with a yield of 94% to 98% is capable of being obtained.
    Type: Grant
    Filed: March 4, 2021
    Date of Patent: March 12, 2024
    Assignees: NANJING UNIVERSITY, NANJING QUANKAI RESEARCH INSTITUTE OF BIOMATERIALS CO., LTD.
    Inventors: Wei Jiang, Yunbiao Qi, Ping Sun, Wei Huang, Aimin Li, Quanxing Zhang
  • SYNTHESIS METHOD AND DEVICE FOR RAPIDLY PRODUCING LACTIDE AT HIGH YIELD
    Publication number: 20210188799
    Abstract: The invention discloses a synthesis method and device for rapidly producing lactide at high yield. The method comprises: adding a single component of lactic acid or two components of lactic acid and catalyst, passing the mixture through a mixer to enter an oligomer preparation system, increasing a residence time through bottom circulation, synthesizing oligomeric lactic acid, and passing a gas-phase component through a rectification system. With the adoption of the device, the lactide is capable of being efficiently synthesized, crude lactide with a yield of 94% to 98% is capable of being obtained.
    Type: Application
    Filed: March 4, 2021
    Publication date: June 24, 2021
    Inventors: Wei JIANG, Yunbiao QI, Ping SUN, Wei HUANG, Aimin LI, Quanxing ZHANG