Patents by Inventor Matti Vuokko

Matti Vuokko 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 copper from a zinc sulphate solution
    Patent number: 7682581
    Abstract: The purpose of the invention is to remove copper selectively from a concentrated zinc sulphate solution by ion exchange. The method enables a significant reduction in the use of zinc powder during the solution purification of zinc sulphate solution and makes possible to avoid usage of arsenic or antimony trioxides as a precipitation chemical. The method is to be combined with the chloride removal that occurs as a sub-stage of solution purification.
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: March 23, 2010
    Assignee: Outotec Oyj
    Inventors: Leena Lehtinen, Marko Lahtinen, Marika Jyrälä, Matti Vuokko