Patents by Inventor Jussi Pakarinen

Jussi Pakarinen 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 to produce pulp using pre-hydrolysis and Kraft cooking
    Patent number: 9371612
    Abstract: A pulp cooking system including: a cellulosic material feed system, a pre-hydrolysis reactor vessel and a Kraft cooking reactor vessel. The feed material system includes a steaming chip bin and a high pressure transfer device. The pre-hydrolysis reactor vessel maintains the feed material in a mildly acidic condition and allows hydrolysate to be extracted through screens below a hydrolysis zone in the vessel. A wash zone is below the screens and allows wash liquid to flow through the feed material in a cross-current direction. The wash liquid and hydrolysate removed from the feed material is extracted through the screens. The feed material is maintained in a mildly acidic condition through the pre-hydrolysis reactor vessel until the material enters the Kraft cooking vessel where the feed material is treated with alkaline cooking liquors.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: June 21, 2016
    Assignee: ANDRITZ INC.
    Inventors: Aaron Leavitt, Jussi Pakarinen, Brian F. Greenwood
  • METHOD AND APPARATUS TO PRODUCE PULP USING PRE-HYDROLYSIS AND KRAFT COOKING
    Publication number: 20120211183
    Abstract: A pulp cooking system including: a cellulosic material feed system, a pre-hydrolysis reactor vessel and a Kraft cooking reactor vessel. The feed material system includes a steaming chip bin and a high pressure transfer device. The pre-hydrolysis reactor vessel maintains the feed material in a mildly acidic condition and allows hydrolysate to be extracted through screens below a hydrolysis zone in the vessel. A wash zone is below the screens and allows wash liquid to flow through the feed material in a cross-current direction. The wash liquid and hydrolysate removed from the feed material is extracted through the screens. The feed material is maintained in a mildly acidic condition through the pre-hydrolysis reactor vessel until the material enters the Kraft cooking vessel where the feed material is treated with alkaline cooking liquors.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 23, 2012
    Applicant: Andritz Inc.
    Inventors: Aaron LEAVITT, Jussi Pakarinen, Brian F. Greenwood