Patents Assigned to Nippon Mining Co.
  • Elution process for gold-iodine complex from ion-exchange resins
    Patent number: 5051128
    Abstract: A process for eluting gold-iodine complex from an ion-exchange resin, characterized by adding sulfuric acid and sodium nitrite to the gold-iodine complex adsorbed on the resin, and adding sodium sulfite as an eluant. The process is particularly useful for eluting gold-iodine complex adsorbed on strongly basic anion-exchange resin, such as washings resulting from the washing of leach residue which has been passed through the resin.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: September 24, 1991
    Assignees: Nippon Mining Co., In-Situ, Inc.
    Inventor: Susumu Kubo