Patents by Inventor Soile H. Pihlajamaki

Soile H. Pihlajamaki 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).

  • Alkaline sulfite pulping process with sodium aluminate and anthraquinone
    Patent number: 4384921
    Abstract: An alkaline sulfite pulping process in which the lignocellulosic material is cooked in a solution containing sodium sulfite is provided. Sodium aluminate is used as a buffering agent. As a result of this, the stability of the pH of the cook and the properties of the pulp are improved. The amount of sodium aluminate as NaOH is from 2% to 8% based on the dry weight of the chips. The pulping process is carried out with the addition of a small dosage of anthraquinone, to produce chemically defibered pulps.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 24, 1983
    Assignee: Osakeyhtio A. Ahlstrom
    Inventors: Soile H. Pihlajamaki, Nils-Erik Virkola