Patents by Inventor Kangzhong SHAO

Kangzhong SHAO 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 extracting and isolating lutein crystal from vegetable oil resin containing lutein diester
    Patent number: 11920175
    Abstract: A method for extracting and isolating a lutein crystal from a vegetable oil resin containing a lutein diester, comprises: dissolving lipase into deionized water to form an enzyme solution; dissolving a lutein extract into an alcohol solvent containing the deionized water to form a uniform alcohol solution; adding the enzyme solution to the alcohol solution for performing hydrolysis, and stirring same to obtain a lutein solution; filtering and performing filtration isolation on the lutein solution to obtain a crystalline; re-dissolving the crystalline into a non-polar organic solvent, and using deionized water for washing a water-soluble impurity; recycling and cooling the organic solvent to obtain a recrystallization; and isolating and drying the recrystallization to obtain the lutein crystal. In this method, selectivity is strong, reaction time is short, no waste water is produced, process is environment-friendly and suitable for industrial production, and obtained lutein crystal is high in purity and yield.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: March 5, 2024
    Assignee: ZHEJIANG MEDICINE CO., LTD. XINCHANG PHARMACEUTICAL FACTORY
    Inventors: Xinde Xu, Tian Xie, Shengfan Wang, Qiuyan Wang, Jianyong Zheng, Zhaowu Zeng, Xiaopu Yin, Xuejun Lao, Kangzhong Shao
  • Method For Extracting And Isolating Lutein Crystal From Vegetable Oil Resin Containing Lutein Diester
    Publication number: 20210147353
    Abstract: A method for extracting and isolating a lutein crystal from a vegetable oil resin containing a lutein diester, comprises: dissolving lipase into deionized water to form an enzyme solution; dissolving a lutein extract into an alcohol solvent containing the deionized water to form a uniform alcohol solution; adding the enzyme solution to the alcohol solution for performing hydrolysis, and stirring same to obtain a lutein solution; filtering and performing filtration isolation on the lutein solution to obtain a crystalline; re-dissolving the crystalline into a non-polar organic solvent, and using deionized water for washing a water-soluble impurity; recycling and cooling the organic solvent to obtain a recrystallization; and isolating and drying the recrystallization to obtain the lutein crystal. In this method, selectivity is strong, reaction time is short, no waste water is produced, process is environment-friendly and suitable for industrial production, and obtained lutein crystal is high in purity and yield.
    Type: Application
    Filed: July 9, 2019
    Publication date: May 20, 2021
    Inventors: Xinde XU, Tian XIE, Shengfan WANG, Qiuvan WANG, Jianyong ZHENG, Zhaowu ZENG, Xiaopu YIN, Xuejun LAO, Kangzhong SHAO