Patents by Inventor Kristin Hals

Kristin Hals 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).

  • Enzymatic hydrolysis of cellulose
    Patent number: 9193982
    Abstract: The present invention relates to a continuous process for the enzymatic hydrolysis of cellulosic biomass and to an apparatus for conducting said process. According to the present invention, a steady state is achieved in a reactor in regard to the hydrolysis reaction. Therein, cellulosic biomass of a high total solids content (preferably 10% or higher, further preferably between 15 and 30%) is continually added to said reactor, while at least partially hydrolyzed cellulosic biomass is continually removed from said reactor. The steady state is adjusted, i.e. the amount of cellulosic biomass added and the amount of at least partially hydrolyzed cellulosic biomass removed is adjusted, so that the retention time of a given portion of added cellulosic biomass in the reactor is longer than its “liquefaction time”, i.e. the time period required to transform a solid slurry into a pumpable liquid during hydrolysis, i.e.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: November 24, 2015
    Assignee: BORREGAARD AS
    Inventors: Anders Sjoede, Anders Froelander, Martin Lersch, Gudbrand Roedsrud, Kristin Hals, Anne Mari Kloeften, Lennart Delin, Mats H Johansson
  • Enzymatic Hydrolysis of Cellulose
    Publication number: 20130217074
    Abstract: The present invention relates to a continuous process for the enzymatic hydrolysis of cellulosic biomass and to an apparatus for conducting said process. According to the present invention, a steady state is achieved in a reactor in regard to the hydrolysis reaction. Therein, cellulosic biomass of a high total solids content (preferably 10% or higher, further preferably between 15 and 30%) is continually added to said reactor, while at least partially hydrolyzed cellulosic biomass is continually removed from said reactor. The steady state is adjusted, i.e. the amount of cellulosic biomass added and the amount of at least partially hydrolyzed cellulosic biomass removed is adjusted, so that the retention time of a given portion of added cellulosic biomass in the reactor is longer than its “liquefaction time”, i.e. the time period required to transform a solid slurry into a pumpable liquid during hydrolysis, i.e.
    Type: Application
    Filed: June 16, 2011
    Publication date: August 22, 2013
    Applicant: BORREGAARD AS
    Inventors: Anders Sjoede, Anders Froelander, Martin Lersch, Gudbrand Roedsrud, Kristin Hals, Anee Mari Kloeften, Lennart Delin, Mats H. Johansson