Patents by Inventor Alex K. Bonsu

Alex K. Bonsu 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).

  • Single-stage slaking and causticizing method
    Patent number: 5145556
    Abstract: A one-step slaking/causticizing method for producing white liquor from unslaked lime and clarified green liquor comprising introducing a feed slurry of unslaked lime and clarified green liquor into a pressurized slaker/causticizer reaction zone and maintaining the mixture in the zone at a temperature, under sufficient pressure and for a time sufficient, in one step to slake the lime and to convert the slaked lime to a white liquor containing product slurry.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: September 8, 1992
    Assignee: International Paper Company
    Inventors: J. Lennart Westerberg, Alex K. Bonsu, Fred J. Perrett