Patents by Inventor Hua Shang

Hua Shang 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).

  • Hole jet reactor and a process for the preparation of an isocyanate using the reactor
    Patent number: 8333927
    Abstract: The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: December 18, 2012
    Assignee: Ningbo Wanhua Polyurethanes Co., Ltd.
    Inventors: Jiansheng Ding, Yong hua Shang, Deqiang Ma, Jingquan Hao, Peicheng Luo, Shuang Hu
  • Hole jet reactor and a process for the preparation of an isocyanate using the reactor
    Publication number: 20100137634
    Abstract: The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.
    Type: Application
    Filed: August 21, 2007
    Publication date: June 3, 2010
    Inventors: Jiansheng Ding, Yong hua Shang, Deqiang Ma, Jingquan Hao, Peicheng Luo, Shuang Hu