Patents by Inventor Antti Arpalahti

Antti Arpalahti 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 for the removal of chloride from zinc sulphate solution
    Patent number: 8540950
    Abstract: The invention relates to a method for removing chloride from zinc sulphate solution in conjunction with zinc production. According to the method, the chloride is removed from solution by means of monovalent copper, which is produced in a separate copper(I) oxide formation stage, in which the pH is regulated to the region of 4.5-5.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: September 24, 2013
    Assignee: Outotec Oyj
    Inventors: Mikko Ruonala, Kurt Svens, Antti Arpalahti, Karoliina Lepistö
  • METHOD FOR THE REMOVAL OF CHLORIDE FROM ZINC SULPHATE SOLUTION
    Publication number: 20120288424
    Abstract: The invention relates to a method for removing chloride from zinc sulphate solution in conjunction with zinc production. According to the method, the chloride is removed from solution by means of monovalent copper, which is produced in a separate copper(I) oxide formation stage, in which the pH is regulated to the region of 4.5-5.
    Type: Application
    Filed: November 22, 2010
    Publication date: November 15, 2012
    Applicant: OUTOTEC QYJ
    Inventors: Mikko Ruonala, Kurt Svens, Antti Arpalahti, Karoliina Lepistö