Patents by Inventor Terry I. Mudder

Terry I. Mudder 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).

  • Cyanide recycling process
    Patent number: 5254153
    Abstract: A process for recycling hydrogen cyanide from a cyanide-containing slurry is provided. The process includes the steps of adjusting the pH of a cyanide-containing slurry, volatilizing HCN contained in the pH adjusted slurry and contacting the volatilized HCN with a precious metals-containing slurry to recover precious metals therefrom. Alternatively, the HCN can be contacted with reclaim, or decant, water to recover cyanide, thereby conserving resources.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: October 19, 1993
    Assignee: Cyprus Minerals Company
    Inventor: Terry I. Mudder
  • Cyanide recovery process
    Patent number: 5078977
    Abstract: A process for removing and recovering cyanide from a cyanide-containing mixture. The process includes the steps of adjusting the pH of the cyanide-containing mixture to between about 6 to about 9.5, volatilizing the HCN contained in the pH adjusted mixture and contacting the volatilized HCN with basic material. Preferably, the cyanide recovery process is performed on tailings slurries resulting from metal recovery processes.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: January 7, 1992
    Assignee: Cyprus Minerals Company
    Inventors: Terry I. Mudder, Adrian J. Goldstone
  • Cyanide regeneration process
    Patent number: 4994243
    Abstract: A process for removing and recovering cyanide from a cyanide-containing solution. The process includes the steps of adjusting the pH of the cyanide-containing solution to between about pH 6 and about pH 9.5, volatilizing the HCN contained in the pH adjusted solution and contacting the volatilized HCN with basic material. Preferably, the cyanide recovery process is performed on tailings slurries resulting from metal recovery processes.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: February 19, 1991
    Assignee: Cyprus Minerals Company
    Inventors: Adrian J. Goldstone, Terry I. Mudder