Patents by Inventor Jeffery D. Casteel

Jeffery D. Casteel 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).

  • Process for removal of mercury from hydroxyl-ammonium nitrate solutions
    Patent number: 5294417
    Abstract: A process for the removal of mercury from industrial waste streams is disclosed wherein the waste stream is a nitrate based solution that has been decomposed by the addition of hypochlorite. The method involves adding a reducing agent to reduce the hypochlorite and/or adjusting the pH by the use of a strong acid to less than about 2.0, converting any residual chlorine to a soluble unreactive salt, adding a soluble precipitating agent, such as sodium sulfide, to the solution in a ratio to the mercury present of greater than 1:1 to about 2:1 to precipitate out the mercury as a mercury compound. The solution is then filtered to remove the precipitated mercury compound.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: March 15, 1994
    Assignee: Olin Corporation
    Inventors: Sanders H. Moore, James F. Pickering, Ronald L. Dotson, Carey O. Burger, Jeffery D. Casteel, Phillip J. Reed, Richard E. Mellor