Patents by Inventor Yrjö Oinonen

Yrjö Oinonen 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
  • Equipment for the leaching of solid matter from sludge
    Patent number: 6793816
    Abstract: The present invention concerns equipment for the leaching of solid matter from a sludge with the aid of a gas containing oxygen, the said equipment comprising a tall reactor (1) equipped with a central pipe (2) and from the reactor bottom (3), an upward-directed double-action mixer (5). The mixer is situated in the vicinity of the lower edge of the central pipe: the upper blades (13) of the mixer produce a downward suction flow from the central pipe, and the lower blades (14) disperse the gas to be fed into the sludge in the form of small bubbles, thereby preventing the solid matter from settling to the bottom of the reactor.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: September 21, 2004
    Assignee: Outokumpu Oyj
    Inventors: Heikki Takala, Yrjö Oinonen, Kurt Höglund
  • Method for the leaching of solid matter from sludge
    Patent number: 6770207
    Abstract: The invention relates to a method for the leaching of solid matter from a sludge with the aid of a gas containing oxygen, whereby the solid matter of the sludge is recirculated in a tall reactor equipped with a central pipe in the centre of the reactor and a double-action mixer located in the vicinity of the lower edge of the central pipe. A flow is formed with the aid of the mixer which sucks the sludge from the central pipe downward, and a gas to be conducted into the sludge in the bottom part of the reactor is dispersed in the form of small bubbles into the sludge outside the central pipe and the flow direction of the sludge is turned upwards in the outer casing of the reactor.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: August 3, 2004
    Assignee: Outokumpu Oyj
    Inventors: Heikki Takala, Yrjö Oinonen