Patents by Inventor Zheng-xing Gu

Zheng-xing Gu 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).

  • Beneficiating dolomitic phosphate ores with humic acid
    Patent number: 4804462
    Abstract: A phosphate ore flotation process for subjecting a phosphate ore containing dolomitic impurities to beneficiation as follows: The flotation feed is first conditioned with fatty acid and fuel oil as collectors and then reconditioned with humic acid as a modifier; subjecting the reconditioned flotation feed to rougher phosphate flotation to collect the rougher phosphate concentrate from the overflow; subjecting said rougher phosphate concentrate to at least one cleaner phosphate flotation; and recovering the phosphate product in the overflow from said cleaner phosphate flotation step.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: February 14, 1989
    Assignees: Lian-yun-gang Chemical Mines Research and Design Institute, The Tennessee Valley Authority
    Inventors: Zheng-xing Gu, Shaung-shii Hsieh