Patents by Inventor Leguan Huang

Leguan Huang 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 of preparing pentaerythritol
    Patent number: 8293950
    Abstract: A method of preparing monopentaerythritol, dipentaerthritol, and sodium formate through high temperature condensation and cascade recrystallization is disclosed. The method lowers the energy consumption dramatically and improves the cost-effectiveness by carrying out the reaction in a non-low-temperature zone, and thereby avoiding the requirement for refrigeration. The method alleviates the difficulty of separation and improves the product quality by means of cascade separation process, and thereby avoiding the low purity from a single separation. In addition, the mother liquor obtained after each separation step is recycled to the previous step as the recycling liquor, which avoids discharging waste, increases the product yield and lowers raw materials consumption.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: October 23, 2012
    Assignee: Hubei Yihua Chemical Industry Co., Ltd.
    Inventors: Yuanhua Jiang, Xiaoqin Yang, Pingguan Bian, Jiaxin Feng, Jinjun Dong, Huazhong He, Yuanhai Li, Yexiang Zhang, Leguan Huang
  • METHOD OF PREPARING PENTAERYTHRITOL
    Publication number: 20100152500
    Abstract: A method of preparing monopentaerythritol, dipentaerthritol, and sodium formate through high temperature condensation and cascade recrystallization is disclosed. The method lowers the energy consumption dramatically and improves the cost-effectiveness by carrying out the reaction in a non-low-temperature zone, and thereby avoiding the requirement for refrigeration. The method alleviates the difficulty of separation and improves the product quality by means of cascade separation process, and thereby avoiding the low purity from a single separation. In addition, the mother liquor obtained after each separation step is recycled to the previous step as the recycling liquor, which avoids discharging waste, increases the product yield and lowers raw materials consumption.
    Type: Application
    Filed: March 31, 2006
    Publication date: June 17, 2010
    Applicant: Hubei Yihua Chemical Industry Co., Ltd.
    Inventors: Yuanhua Jiang, Xiaoquin Yang, Pingguan Bian, Jiaxin Feng, Jinjun Dong, Huazhong He, Yuanhai Li, Yexiang Zhang, Leguan Huang