Patents by Inventor Kai Jyrkkä

Kai Jyrkkä 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).

  • METHOD AND APPARATUS FOR REGENERATION OF EXTRACTION SOLUTION IN METAL EXTRACTION PROCESSES
    Publication number: 20150144540
    Abstract: A method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction are provided. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The reaction stage and the adsorptive stage are carried out in a mixing tank.
    Type: Application
    Filed: February 2, 2015
    Publication date: May 28, 2015
    Applicant: OUTOTEC (Finland) Oy
    Inventors: Erkki Paatero, Kai Jyrkkä, Sami Virolainen
  • Method of regeneration an organic extraction solution that has been used in a liquid-liquid extraction process
    Patent number: 8974673
    Abstract: The invention relates to a method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The reaction stage and the adsorptive stage are carried out in a mixing tank.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: March 10, 2015
    Assignee: Outotec Oyj
    Inventors: Erkki Paatero, Kai Jyrkkä, Sami Virolainen
  • METHOD AND APPARATUS FOR REGENERATION OF EXTRACTION SOLUTION IN METAL EXTRACTION PROCESSES
    Publication number: 20120080382
    Abstract: The invention relates to a method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The reaction stage and the adsorptive stage are carried out in a mixing tank.
    Type: Application
    Filed: May 26, 2010
    Publication date: April 5, 2012
    Applicant: OUTOTEC OYJ
    Inventors: Erkki Paatero, Kai Jyrkkä, Sami Virolainen