Patents by Inventor Steven Qun DONG

Steven Qun DONG 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).

  • Synergistic effect of surfactant combinations as dewatering aids for alumina trihydrate
    Patent number: 8585992
    Abstract: The invention is directed towards methods and compositions for treating slurry to better dewater alumina trihydrate precipitated from the Bayer process. The method comprises using a product comprising the combination of at least two surfactants together with an optional coupling agent to treat the alkaline slurry with certain amount of alumina trihydrate present. Synergistic effects between binary combinations of nonionic and anionic surfactants result in more efficient dewatering aids for alumina trihydrate slurry when combinations of such surfactants are applied. A coupling agent may be used in formulations to reduce viscosity of such surfactant combinations, allowing the practical application of such products.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: November 19, 2013
    Assignee: Nalco Company
    Inventors: Paul Qi Wang, Steven Qun Dong
  • SYNERGISTIC EFFECT OF SURFACTANT COMBINATIONS AS DEWATERING AIDS FOR ALUMINA TRIHYDRATE
    Publication number: 20120288438
    Abstract: The invention is directed towards methods and compositions for treating slurry to better dewater alumina trihydrate precipitated from the Bayer process. The method comprises using a product comprising the combination of at least two surfactants together with an optional coupling agent to treat the alkaline slurry with certain amount of alumina trihydrate present. Synergistic effects between binary combinations of nonionic and anionic surfactants result in more efficient dewatering aids for alumina trihydrate slurry when combinations of such surfactants are applied. A coupling agent may be used in formulations to reduce viscosity of such surfactant combinations, allowing the practical application of such products.
    Type: Application
    Filed: September 7, 2011
    Publication date: November 15, 2012
    Inventors: Paul Qi WANG, Steven Qun DONG