Patents by Inventor Terry W. Pepper

Terry W. Pepper 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).

  • Recovery of silver, copper and zinc from partially roasted pyrite concentrate by ferric sulphate leaching
    Patent number: 4177067
    Abstract: A process for treating a pyrite concentrate containing silver, copper and zinc to recover the metals contained therein is disclosed. The process includes the partial roasting of the concentrate to open the pyrite matrix to solution penetration followed by hydrometallurgical steps, including ferric sulphate leaching, reduction leaching, solid-liquid separation and metal extraction steps, to recover the copper and zinc separately and silver in concentrated form.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: December 4, 1979
    Assignee: Texasgulf Inc.
    Inventors: Terry W. Pepper, Harry G. Bocckino
  • Recovery of silver, copper, zinc and lead from partially roasted pyrite concentrate by acid chloride leaching
    Patent number: 4168969
    Abstract: A process for treating a pyrite concentrate containing silver, copper, lead and zinc to recover the metals contained therein is disclosed. The process includes the partial roasting of the concentrate to open the pyrite matrix to solution penetration followed by various hydrometallurgical steps, including oxidation and reduction leaching, solid-liquid separation and metal extraction steps, to recover the copper and silver together, and the lead and zinc separately.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: September 25, 1979
    Assignee: Texasgulf Inc.
    Inventors: Terry W. Pepper, Harry G. Bocckino