Patents Assigned to Lars Stigsson
  • Chemical enhanced fuel peat dewatering
    Patent number: 4671802
    Abstract: The present invention relates to an improved process of chemically enhanced peat dewatering by pretreatment of the peat substance with an acid and a cationic polyelectrolyte before mechanical dewatering.
    Type: Grant
    Filed: April 9, 1986
    Date of Patent: June 9, 1987
    Assignee: Lars Stigsson
    Inventor: Bengt Jonsson