Patents by Inventor Dennis Michalski

Dennis Michalski 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).

  • Simplified purification of phosphoric acid plant pond water
    Patent number: 6758976
    Abstract: A simplified process for the partial purification of contaminated phosphoric acid plant pond water having a molar calcium plus magnesium to fluorine ratio greater than or equal to about 0.60, is described, in which the pond water is treated with a basic compound, clarified, aged, clarified again and re-acidified. The thus treated pond water, still containing the majority of the phosphate originally present, can then be concentrated via the removal of essentially pure water, using any conventional means of concentration, without the formation of solid precipitates.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: July 6, 2004
    Assignee: IMC Global Operations Inc.
    Inventors: Dennis Michalski, Kenneth J. Jardine, Vaughn V. Astley