Patents by Inventor Roosevelt Alexander

Roosevelt Alexander 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).

  • Selenium removal from water
    Patent number: 7419602
    Abstract: A process for removing selenium from a water stream, in particular a waste water stream, by: 1) the addition thereto of a ferric salt, followed by 2) the addition of a cupric salt and pH adjustment to a pH value in the range of from about 6.5 to about 8.0, thereby forming a copper-and-selenium-containing precipitate, and 3) removing the copper-and-selenium-containing precipitate to thereby form a treated water stream, is disclosed. The optional precipitation and removal of excess copper ions is also disclosed.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: September 2, 2008
    Assignee: ConocoPhillips Company
    Inventors: Roosevelt Alexander, Charles J. Lord, Steven C. Mitchell
  • Selenium removal from water
    Publication number: 20070114185
    Abstract: A process for removing selenium from a water stream, in particular a waste water stream, by: 1) the addition thereto of a ferric salt, followed by 2) the addition of a cupric salt and pH adjustment to a pH value in the range of from about 6.5 to about 8.0, thereby forming a copper-and-selenium-containing precipitate, and 3) removing the copper-and-selenium-containing precipitate to thereby form a treated water stream, is disclosed. The optional precipitation and removal of excess copper ions is also disclosed.
    Type: Application
    Filed: November 22, 2005
    Publication date: May 24, 2007
    Inventors: Roosevelt Alexander, Charles Lord, Steven Mitchell