Patents Assigned to COREM
  • Publication number: 20230167525
    Abstract: Methods for recovering gold from a refractory gold ore and concentrate are described. The method can include leaching the refractory gold ore and concentrate with the alkaline reagent under ambient or near-ambient conditions and a subsequent gold complexation. The method can optionally include separating a gold-containing leachate from a gold-unlocked solid residue obtained during the leaching step and performing a subsequent complexation on the gold-unlocked solid residue and optionally gold complexation on the gold-containing leachate. These methods can increase the gold recovery compared to conventional methods.
    Type: Application
    Filed: April 30, 2021
    Publication date: June 1, 2023
    Applicant: COREM
    Inventors: Gnouyaro Palla ASSIMA, Benoit LEVASSEUR, Caroline OLSEN, Danielle DROLET
  • Patent number: 9404168
    Abstract: A process for recovering a precious metal from ore includes adding process water containing thiocyanates to ore particles to obtain a pulp. The pulp having a basic pH is contacted with an oxidizing gas containing ozone; and the pulp is contacted with cyanide. Contacting the pulp with cyanide can include adding cyanide subsequently to contacting the pulp with the oxidizing gas containing ozone.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: August 2, 2016
    Assignee: COREM
    Inventors: Benoit Levasseur, Eric Proulx, Caroline Olsen