Patents by Inventor Huamin LIU

Huamin LIU 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: 11639336
    Abstract: A catalyst and a method for preparing S-indoxacarb using the catalyst. The catalyst is prepared using 3-tert-butyl-5-(chloromethyl)salicylaldehyde and cyclohexanediamine as raw materials, where an original quinine catalyst such as cinchonine is replaced with the catalyst for application in the asymmetric synthesis of tert-butyl hydroperoxide and 5-chloro-2-methoxycarbonyl-1-indanone ester, greatly improving selection in the asymmetric synthesis process, with the S-enantiomer content increasing from 75% to over 98%, achieving the recycling of a high-efficiency chiral catalyst, and greatly reducing production costs. The synthesis process of the catalyst is simple and is favorable for industrialization, and lays good foundations for the production of high-quality indoxacarb.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: May 2, 2023
    Assignee: SHANDONG JINGBO AGROCHEMICALS TECHNOLOGY CO., LTD.
    Inventors: Leifang Bo, Daoquan Cheng, Jiancheng Liu, Peiliang Feng, Huamin Liu, Zhongyang Wang
  • Publication number: 20210171476
    Abstract: A catalyst and a method for preparing S-indoxacarb using the catalyst. The catalyst is prepared using 3-tert-butyl-5-(chloromethyl)salicylaldehyde and cyclohexanediamine as raw materials, where an original quinine catalyst such as cinchonine is replaced with the catalyst for application in the asymmetric synthesis of tert-butyl hydroperoxide and 5-chloro-2-methoxycarbonyl-1-indanone ester, greatly improving selection in the asymmetric synthesis process, with the S-enantiomer content increasing from 75% to over 98%, achieving the recycling of a high-efficiency chiral catalyst, and greatly reducing production costs. The synthesis process of the catalyst is simple and is favorable for industrialization, and lays good foundations for the production of high-quality indoxacarb.
    Type: Application
    Filed: April 25, 2019
    Publication date: June 10, 2021
    Applicant: JINGBO AGROCHEMICALS TECHNOLOGY CO., LTD.
    Inventors: Leifang BO, Daoquan CHENG, Jiancheng LIU, Peiliang FENG, Huamin LIU, Zhongyang WANG
  • Patent number: D1027260
    Type: Grant
    Filed: January 28, 2024
    Date of Patent: May 14, 2024
    Inventor: Huamin Liu