Patents by Inventor Eric A. P. Devuyst

Eric A. P. Devuyst 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).

  • Effluent treatment
    Patent number: 4622149
    Abstract: A process in which ferric ion in water-soluble form is added to an effluent containing cyanide, arsenic and antimony and having a pH of about 5 to 9 and treating effluent with SO.sub.2 and oxygen in the presence of soluble copper to produce a treated effluent having very low contents of cyanide, arsenic and antimony.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: November 11, 1986
    Assignee: Inco Limited
    Inventors: Eric A. P. Devuyst, Bruce R. Conard
  • Treatment of cyanide-ferrocyanide effluents
    Patent number: 4615873
    Abstract: A process for treatment of cyanide-containing aqueous effluents in which ferrocyanide present is precipitated with a metal other than copper, preferably zinc either prior to or simultaneously with the treatment of the effluent with sulfur dioxide and air in the presence of soluble copper.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: October 7, 1986
    Assignee: Inco Limited
    Inventors: Eric A. P. Devuyst, Branka Tandi, Bruce R. Conard
  • Process for recovering cobalt electrolytically
    Patent number: 4274930
    Abstract: A cobaltic oxide hydrate is mixed with spent sulfate electrolyte and the slurry is sparged with air to liberate any entrained chloride ions as gaseous chlorine. Thereafter a reducing agent is used to enable dissolution of the cobalt and obtaining of a chloride-free solution from which, after purification, cobalt can be electrowon.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: June 23, 1981
    Assignee: The International Nickel Company, Inc.
    Inventors: Victor A. Ettel, Eric A. P. Devuyst, Juraj Babjak, John Ambrose, Gerald V. Glaum
  • Roast-reductive leach process for copper recovery
    Patent number: 4135918
    Abstract: A sulfide containing copper and one or more of iron, nickel and cobalt, is dead-roasted at a temperature of 750.degree. C or above, then subjected to a pressure leach under reducing conditions to produce elemental copper and an aqueous solution of the other metals.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: January 23, 1979
    Assignee: The International Nickel Company, Inc.
    Inventors: Victor A. Ettel, Eric A. P. Devuyst, Ramamritham Sridhar, Charles E. O'Neill