Patents by Inventor Matti Luhtanen

Matti Luhtanen 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).

  • Production of pulp using a gaseous organic agent as heating and reaction-accelerating media
    Patent number: 9200406
    Abstract: The invention relates to an improved process to break down lignin macromolecules and liberating cellulose fibers in lignocellulosic material using delignifying reactants with a gaseous organic agent as a heating and reaction-accelerating media. Lignocellulosic material is first impregnated with reactant chemicals, e.g. commonly used agents such as sodium hydroxide and sodium sulfide. Subsequently, the energy required for the delignification reactions is provided through heating with a gaseous organic agent such as methanol or ethanol, condensing and releasing energy to the solid lignocellulosic material. The temperature during the heating step with a gaseous organic agent is higher than the temperature during the impregnation step.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: December 1, 2015
    Assignee: Valmet Technologies, Inc.
    Inventors: Eric Enqvist, Panu Tikka, Leopold Heinrich, Matti Luhtanen
  • Production of Pulp Using a Gaseous Organic Agent as Heating and Reaction-Accelerating Media
    Publication number: 20090014138
    Abstract: The invention relates to an improved process to break down lignin macromolecules and liberating cellulose fibers in lignocellulosic material using delignifying reactants with a gaseous organic agent as a heating and reaction-accelerating media. Lignocellulosic material is first impregnated with reactant chemicals, e.g. commonly used agents such as sodium hydroxide and sodium sulfide. Subsequently, the energy required for the delignification reactions is provided through heating with a gaseous organic agent such as methanol or ethanol, condensing and releasing energy to the solid lignocellulosic material. The temperature during the heating step with a gaseous organic agent is higher than the temperature during the impregnation step.
    Type: Application
    Filed: February 10, 2006
    Publication date: January 15, 2009
    Applicant: Metso Paper, Inc.
    Inventors: Eric Enqvist, Panu Tikka, Leopold Heinrich, Matti Luhtanen