Patents by Inventor Harri Natunen

Harri Natunen 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 controlling metal separation
    Patent number: 8021459
    Abstract: The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a-c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: September 20, 2011
    Assignee: Outotec Oyj
    Inventors: Aimo Järvinen, Kai Judin, Harri Natunen, Yrjö Oinonen, Panu Talonen
  • Method for removing mercury from gas
    Patent number: 7481865
    Abstract: The invention relates to a method for the removal of mercury from gas containing sulphur dioxide and oxygen and from the sulphuric acid vapour contained in the gas. According to the method, the gas is washed with a water solution that contains selenium ions, whereby metallic selenium is formed in the presence of oxygen, which precipitates the mercury in the gas and vapour either as a selenide or in a chlorine-containing environment, as a dichloride of mercury and selenium. Gas washing occurs at a low temperature, below 50° C.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: January 27, 2009
    Assignee: Outotec Oyj
    Inventors: Heljä Peltola, Pekka Taskinen, Heikki Takala, Jens Nyberg, Harri Natunen, Jorma Panula
  • Method and Apparatus for Controlling Metal Separation
    Publication number: 20070273071
    Abstract: The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (11a-c), in conjunction with the reactor, the redox potential (16a-c) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (17a-c) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (16a-c) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (16a-c) is purified at predetermined intervals.
    Type: Application
    Filed: July 15, 2004
    Publication date: November 29, 2007
    Applicant: OUTOKUMPU TECHNOLOGY OY
    Inventors: Aimo Jarvinen, Kai Judin, Harri Natunen, Yrjo Oinonen, Panu Talonen
  • Method for removing mercury from gas
    Publication number: 20040081605
    Abstract: The invention relates to a method for the removal of mercury from gas containing sulphur dioxide and oxygen and from the sulphuric acid vapour contained in the gas. According to the method, the gas is washed with a water solution that contains selenium ions, whereby metallic selenium is formed in the presence of oxygen, which precipitates the mercury in the gas and vapour either as a selenide or in a chlorine-containing environment, as a dichloride of mercury and selenium. Gas washing occurs at a low temperature, below 50° C.
    Type: Application
    Filed: November 26, 2003
    Publication date: April 29, 2004
    Inventors: Helja Peltola, Pekka Taskinen, Heikki Takala, Jens Nyberg, Harri Natunen, Jorma Panula