Patents by Inventor Dongzhao HAN

Dongzhao HAN 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 recycling mother liquid of pure terephthalic acid (PTA) refining unit
    Patent number: 10787411
    Abstract: The present invention relates to a method of recycling mother liquid of a PTA refining unit. The present invention recycles waste heat and PT acids of a PTA mother liquid to effectively utilize heat in the PTA mother liquid, solves influence of crystallization of the PT acids on subsequent system, reduces pollution to the environment, and can produce huge economic benefits by using high efficient multistage flash distillation technology, low temperature cogeneration technology, heat pump heating and cooling technology, and low temperature crystallization technology.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: September 29, 2020
    Assignee: TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO., LTD
    Inventors: Xu Zhao, Tao Shen, Tianbao Wang, Wanyao Zhang, Yuanrui Lu, Lilong Xu, Min Jia, Dongzhao Han, Xiaoling Xie, Yongning Qiu
  • METHOD OF RECYCLING MOTHER LIQUID OF PTA REFINING UNIT
    Publication number: 20190225569
    Abstract: The present invention relates to a method of recycling mother liquid of a PTA refining unit. The present invention recycles waste heat and PT acids of a PTA mother liquid to effectively utilize heat in the PTA mother liquid, solves influence of crystallization of the PT acids on subsequent system, reduces pollution to the environment, and can produce huge economic benefits by using high efficient multistage flash distillation technology, low temperature cogeneration technology, heat pump heating and cooling technology, and low temperature crystallization technology.
    Type: Application
    Filed: May 15, 2017
    Publication date: July 25, 2019
    Inventors: Xu ZHAO, Tao SHEN, Tianbao WANG, Wanyao ZHANG, Yuanrui LU, Lilong XU, Min JIA, Dongzhao HAN, Xiaoling XIE, Yongning QIU