Patents by Inventor Shuaifeng PAN

Shuaifeng PAN 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).

  • Preparation method for 4-phenylthio-benzenethiol
    Patent number: 11220478
    Abstract: The present disclosure discloses a preparation method for 4-phenylthio-benzenethiol. The preparation method comprises the following steps: subjecting phenyl sulfide as a raw material to a halogenation reaction to obtain 4-halophenyl sulfide; subjecting the 4-halophenyl sulfide to a sulfhydrylation reaction to obtain a 4-phenylthio-phenylthiolate; and subjecting the 4-phenylthio-phenylthiolate to acidification. The preparation method of the present disclosure avoids the use of materials such as thiophenol which pollutes the environment, and realizes efficient recycling of the reaction materials, solvents, water and the like. The preparation method of the present disclosure is a green process for the synthesis of 4-phenylthio-phenylthiol without organic waste, waste acid and waste water discharge.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: January 11, 2022
    Assignees: Zhejiang NHU Company Ltd., Zhejiang University, Zhejiang NHU Special Materials Co., Ltd.
    Inventors: Zhirong Chen, Woyuan Li, Hong Yin, Guíyang Zhou, Haoran Li, Shuaifeng Pan, Ming Lian, Guangde Qin, Qichuan Li
  • PREPARATION METHOD FOR 4-PHENYLTHIO-BENZENETHIOL
    Publication number: 20210009514
    Abstract: The present disclosure discloses a preparation method for 4-phenylthio-benzenethiol. The preparation method comprises the following steps: subjecting phenyl sulfide as a raw material to a halogenation reaction to obtain 4-halophenyl sulfide; subjecting the 4-halophenyl sulfide to a sulfhydrylation reaction to obtain a 4-phenylthio-phenylthiolate; and subjecting the 4-phenylthio-phenylthiolate to acidification. The preparation method of the present disclosure avoids the use of materials such as thiophenol which pollutes the environment, and realizes efficient recycling of the reaction materials, solvents, water and the like. The preparation method of the present disclosure is a green process for the synthesis of 4-phenylthio-phenylthiol without organic waste, waste acid and waste water discharge.
    Type: Application
    Filed: July 12, 2018
    Publication date: January 14, 2021
    Applicants: Zhejiang NHU Company Ltd, Zhejiang University, Zhejiang NHU Special Materials Co., Ltd.
    Inventors: Zhirong CHEN, Woyuan LI, Hong YIN, Guíyang ZHOU, Haoran LI, Shuaifeng PAN, Ming LIAN, Guangde QIN, Qichuan LI