Patents by Inventor Hannu Laitala

Hannu Laitala 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).

  • Patent number: 9725787
    Abstract: The invention relates to a process for producing a lithium-containing solution from a lithium-containing raw-material solution, by: a) precipitating a first part of magnesium and calcium from the lithium-containing raw-material solution, b) extracting a second part of calcium and magnesium from the lithium-containing solution by liquid-liquid extraction, a resultant product being a lithium-containing solution. The invention also relates to equipment for producing a lithium-containing solution from a lithium-containing raw-material solution, including a precipitation unit to remove a first part of magnesium and calcium and an extraction unit to receive the lithium-containing raw-material solution and to remove therefrom a second part of calcium and magnesium by liquid-liquid extraction, and control unit to control the operation of the precipitation unit.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: August 8, 2017
    Assignee: Outotec (Finland) Oy
    Inventors: Hannu Laitala, Janne Karonen, Liisa Haavanlammi
  • Publication number: 20150147248
    Abstract: The invention relates to a process for producing a lithium-containing solution from a lithium-containing raw-material solution, by: a) precipitating a first part of magnesium and calcium from the lithium-containing raw-material solution, b) extracting a second part of calcium and magnesium from the lithium-containing solution by liquid-liquid extraction, a resultant product being a lithium-containing solution. The invention also relates to equipment for producing a lithium-containing solution from a lithium-containing raw-material solution, including a precipitation unit to remove a first part of magnesium and calcium and an extraction unit to receive the lithium-containing raw-material solution and to remove therefrom a second part of calcium and magnesium by liquid-liquid extraction, and control unit to control the operation of the precipitation unit.
    Type: Application
    Filed: June 4, 2013
    Publication date: May 28, 2015
    Applicant: OUTOTEC (FINLAND) OY
    Inventors: Hannu Laitala, Janne Karonen, Liisa Haavanlammi
  • Patent number: 9010548
    Abstract: A method and arrangement for separating two solutions mixed in dispersion into two solution phases in a liquid-liquid extraction separation cell. A lighter solution phase placed on the heavier solution phase is forced to flow as a thin overflow layer over the top edge of a front panel such that the dispersion thickens A rear panel is essentially parallel with the front panel so that in between the front panel and the rear panel, there is formed an uptake shaft along which the thickened dispersion can rise and be compressed.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: April 21, 2015
    Assignee: Outotec Oyj
    Inventors: Bror Nyman, Eero Ekman, Pertti Pekkala, Hannu Laitala, Rami Saario
  • Patent number: 8961795
    Abstract: The invention relates to an apparatus and method for removing molybdenum and other possible impurities from an organic copper-containing extraction solution in connection with the liquid-liquid extraction related to copper recovery. The removal of impurities occurs in one or several removal units built into the organic extraction solution storage tank.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: February 24, 2015
    Assignee: Outotec Oyj
    Inventors: Hannu Laitala, Erkki Paatero, Bror Nyman, Eero Ekman
  • Patent number: 8858799
    Abstract: The invention relates to a method and arrangement for separating two solutions mixed in dispersion into two solution phases in a liquid-liquid extraction separation cell. The arrangement includes a first guide wall extending along the whole width of the cell with respect to the vertical direction at an inclined angle. The first guide wall includes a bottom edge, which is located at a distance from the cell bottom, so that a clearance gap is formed between the bottom edge and the cell bottom. The arrangement also includes a second guide wall essentially parallel with the first guide wall and placed at a distance therefrom. Between the first guide wall and the second guide wall an uptake shaft is formed extending diagonally upwards at the inclined angle. The second guide wall is pressed tightly against the cell bottom, and includes a number of vertical slots.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: October 14, 2014
    Assignee: Outotec Oyj
    Inventors: Bror Nyman, Eero Ekman, Pertti Pekkala, Hannu Laitala, Rami Saario
  • Publication number: 20130243615
    Abstract: A pump (1) for mixing two or more mutually insoluble liquid phases together into a dispersion and for feeding the dispersion into a mixer (2) and on into a solvent extraction settler (3). The inner space of the blade wheel housing (12) is bound in the upward direction by a cover plate (19), in which there is a central shaft bushing (21) for the drive shaft (16) sealed with a mechanical shaft seal (20); and that the discharge channel (18) opening is in the sidewall (13) of the blade wheel housing (12).
    Type: Application
    Filed: November 24, 2011
    Publication date: September 19, 2013
    Applicant: OUTOTEC OYJ
    Inventor: Hannu Laitala
  • Patent number: 8435442
    Abstract: The invention relates to a system used in the liquid-liquid extraction of metals, enabling the amount of organic solution required in the various stages of extraction to be significantly reduced. In accordance with the invention, the settler unit of one step belonging to an extraction system is selected to function also as the organic solution storage and pumping tank.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: May 7, 2013
    Assignee: Outotec Oyj
    Inventors: Timo Saarenpää, Hannu Laitala, Pertti Pekkala
  • Publication number: 20120018376
    Abstract: The invention relates to an apparatus and method for removing molybdenum and other possible impurities from an organic copper-containing extraction solution in connection with the liquid-liquid extraction related to copper recovery. The removal of impurities occurs in one or several removal units built into the organic extraction solution storage tank.
    Type: Application
    Filed: March 25, 2010
    Publication date: January 26, 2012
    Applicant: OUTOTEC OYJ
    Inventors: Hannu Laitala, Erkki Paatero, Bror Nyman, Eero Ekman
  • Publication number: 20110303619
    Abstract: The invention relates to a method and arrangement for separating two solutions mixed in dispersion into two solution phases in a liquid-liquid extraction separation cell (1). The arrangement includes a first guide wall (4), which is arranged at a distance from that end wall (15) of the cell (1) that is located on the side of the feed end (2), in order to extend along the whole width of the cell with respect to the vertical direction at an inclined angle (?). The first guide wall includes a bottom edge (5), which is located at a distance (H1 . . . H2) from the cell bottom, so that in between the bottom edge (5) and the cell bottom (3), there is left a clearance gap (6) widening from the center towards the cell sides. The second guide wall (7) is essentially parallel with the first guide wall (4) and placed at a distance (L1) therefrom, so that in between the first guide wall (4) and the second guide wall (7), there is formed an uptake shaft (8) extending diagonally upwards at an inclined angle (?).
    Type: Application
    Filed: February 8, 2010
    Publication date: December 15, 2011
    Applicant: OUTOTEC OYJ
    Inventors: Bror Nyman, Eero Ekman, Pertti Pekkala, Hannu Laitala, Rami Saario
  • Publication number: 20110284462
    Abstract: The invention relates to a method and arrangement for separating two solutions mixed in dispersion into two solution phases in a liquid-liquid extraction separation cell (1). The shut-off element (3, 4, 5) comprises a front panel (8) that extends along the whole width of the cell. The front panel (8) includes a bottom edge (9), which is arranged at a distance (H1, H2, H3) from the cell bottom (7), so that the front panel (8) allows an unobstructed flow of the heavier solution phase directly forwards underneath the bottom edge (9). In the vertical direction, the front panel extends to such a height that it forces the lighter solution phase placed on the heavier solution phase to flow as a thin overflow layer over the top edge (12) of the front panel (8) and forces the dispersion to thicken in front of the front panel.
    Type: Application
    Filed: February 5, 2010
    Publication date: November 24, 2011
    Applicant: OUTOTEC OYJ
    Inventors: Bror Nyman, Eero Ekman, Pertti Pekkala, Hannu Laitala, Rami Saario
  • Publication number: 20110068520
    Abstract: The invention relates to a system used in the liquid-liquid extraction of metals, enabling the amount of organic solution required in the various stages of extraction to be significantly reduced. In accordance with the invention, the settler unit of one step belonging to an extraction system is selected to function also as the organic solution storage and pumping tank.
    Type: Application
    Filed: May 12, 2009
    Publication date: March 24, 2011
    Applicant: Outotec Oyj
    Inventors: Timo Saarenpää, Hannu Laitala, Pertti Pekkala
  • Patent number: 6569339
    Abstract: A method and cell for reducing the size of a solvent extraction process in which a series of cells are arranged in an extraction process. The process includes the use of conventional settlers at the beginning and at the end of the extraction process with at least one reduced-size extraction cell in the middle of the extraction process.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: May 27, 2003
    Assignee: Outokumpu Oyj
    Inventors: Hannu Laitala, Sipilä Jussi