Patents by Inventor John C. Stuever

John C. Stuever 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).

  • Flue gas treatment using kraft mill waste products
    Patent number: 9566551
    Abstract: The present invention relates in general to a process for removing mercury from a mercury-containing flue gas using dregs from a Kraft pulp mill green liquor clarifier. The dregs are washed with water to produce a particulate carbon slurry which is activated with hydrobromic acid and injected into a mercury-containing flue gas to oxidize and adsorb the mercury at temperatures less than about 900° F. A slurry of sodium hydroxide and calcium carbonate, optionally also obtained from Kraft mill waste, is injected into the hot flue gas to absorb and remove CO2, SO2, and SO3.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: February 14, 2017
    Assignee: S&S Lime, Inc.
    Inventor: John C. Stuever
  • Particulate matter and methods of obtaining same from a kraft waste reclamation
    Patent number: 9468900
    Abstract: The present invention relates in general to a method of producing activated carbon. Dregs are removed from a pulp mill green liquor clarifier and washed with an acid to produce an activated carbon. The activated carbon slurry can be used to remove mercury from a waste gas stream.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: October 18, 2016
    Assignee: S&S Lime, Inc.
    Inventors: John C. Stuever, Susan C. Stuever
  • FLUE GAS TREATMENT USING KRAFT MILL WASTE PRODUCTS
    Publication number: 20160279568
    Abstract: The present invention relates in general to a process for removing mercury from a mercury-containing flue gas using dregs from a Kraft pulp mill green liquor clarifier. The dregs are washed with water to produce a particulate carbon slurry which is activated with hydrobromic acid and injected into a mercury-containing flue gas to oxidize and adsorb the mercury at temperatures less than about 900° F. A slurry of sodium hydroxide and calcium carbonate, optionally also obtained from Kraft mill waste, is injected into the hot flue gas to absorb and remove CO2, SO2, and SO3.
    Type: Application
    Filed: June 3, 2016
    Publication date: September 29, 2016
    Applicant: S&S Lime, Inc.
    Inventor: John C. Stuever
  • PARTICULATE MATTER AND METHODS OF OBTAINING SAME FROM A KRAFT WASTE RECLAMATION
    Publication number: 20150135953
    Abstract: The present invention relates in general to a method of producing activated carbon. Dregs are removed from a pulp mill green liquor clarifier and washed with an acid to produce an activated carbon. The activated carbon slurry can be used to remove mercury from a waste gas stream.
    Type: Application
    Filed: October 30, 2014
    Publication date: May 21, 2015
    Applicant: S&S Lime, Inc.
    Inventors: John C. Stuever, Susan C. Stuever
  • Particulate Matter and Methods of Obtaining Same from a Kraft Waste Reclamation
    Publication number: 20140023575
    Abstract: The present invention relates in general to a method of scrubbing a waste gas, the method comprising: mixing HBr with washed dregs from a pulp mill green liquor clarifier to produce an activated carbon capable of oxidizing mercury; injecting the activated carbon slurry with HBr into a waste gas containing mercury at a temperature of from about 600° F. to about 900° F., thereby drying the activated carbon and oxidizing the mercury; and collecting the dried activated carbon and oxidized mercury on a filter.
    Type: Application
    Filed: July 16, 2013
    Publication date: January 23, 2014
    Applicant: S&S Lime, Inc.
    Inventors: John C. Stuever, Susan C. Stuever
  • Particulate matter and methods of obtaining same from a Kraft waste reclamation
    Patent number: 8557731
    Abstract: The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: October 15, 2013
    Assignee: S&S Lime, Inc.
    Inventors: Gary A. Olsen, John C. Stuever, Susan C. Stuever
  • Particulate Matter and Methods Of Obtaining Same From A Kraft Waste Reclamation
    Publication number: 20130009093
    Abstract: The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Inventors: Gary A. Olsen, John C. Stuever, Susan C. Stuever
  • Particulate matter and methods of obtaining same from a Kraft waste reclamation
    Patent number: 8288312
    Abstract: The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: October 16, 2012
    Assignee: S&S Lime, Inc.
    Inventors: Gary A. Olsen, John C. Stuever, Susan C. Stuever
  • PARTICULATE MATTER AND METHODS OF OBTAINING SAME FROM A KRAFT WASTE RECLAMATION
    Publication number: 20110300052
    Abstract: The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill.
    Type: Application
    Filed: March 18, 2009
    Publication date: December 8, 2011
    Inventors: Gary A. Olsen, John C. Stuever, Susan C. Stuever
  • PARTICULATE MATTER AND METHODS OF OBTAINING SAME FROM A KRAFT WASTE RECLAMATION
    Publication number: 20090304921
    Abstract: The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill.
    Type: Application
    Filed: May 14, 2009
    Publication date: December 10, 2009
    Inventors: Gary A. Olsen, John C. Stuever, Susan C. Stuever
  • PARTICULATE MATTER AND METHODS OF OBTAINING SAME FROM A KRAFT WASTE RECLAMATION
    Publication number: 20090232723
    Abstract: The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill.
    Type: Application
    Filed: March 18, 2009
    Publication date: September 17, 2009
    Inventors: Gary A. Olsen, John C. Stuever, Susan C. Stuever