Patents Assigned to Envirosolv
  • Method for removing sulfur dioxide, mercury, and nitrogen oxides from a gas stream
    Patent number: 7514053
    Abstract: Methods for scrubbing gas streams to remove acid gases including sulfur dioxide, mercury-containing substances, and/or nitrogen oxides from the gas stream. The gas stream is contacted with a potassium-based sorbent effective for removing at least a portion of the acid gases. The partially cleaned gas stream is then contacted with an oxidant effective to remove at least a portion of the nitrogen oxides and/or mercury-containing substances after partially removing the acid gas substance.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: April 7, 2009
    Assignee: EnviroSolv Energy LLC
    Inventors: Dennis W. Johnson, Mark S. Ehrnschwender
  • Methods for regenerating oxidants used for removing pollutants from a gas stream
    Publication number: 20070154373
    Abstract: Methods for regenerating oxidant solutions used for removing pollutants, such as sulfur oxides, nitrogen oxides, mercury compounds, carbon monoxide, and elemental mercury (Hg), from gas streams.
    Type: Application
    Filed: January 5, 2006
    Publication date: July 5, 2007
    Applicant: EnviroSolv Energy LLC
    Inventors: Dennis Johnson, Mark Ehrnschwender
  • Method for removing sulfur dioxide and other acid gases, mercury, and nitrogen oxides from a gas stream with the optional production of ammonia based fertilizers
    Publication number: 20070154374
    Abstract: Methods for scrubbing gas streams to remove acid gases including sulfur dioxide, mercury-containing substances, and/or nitrogen oxides from the gas stream. The gas stream is contacted with an ammonium-based sorbent effective for removing at least a portion of the acid gases. The partially cleaned gas stream is then contacted with an oxidant effective to remove at least a portion of the nitrogen oxides and/or mercury-containing substances after partially removing the acid gas substance while producing ammonia based fertilizers.
    Type: Application
    Filed: January 5, 2006
    Publication date: July 5, 2007
    Applicant: EnviroSolv Energy LLC
    Inventors: Dennis Johnson, Mark Ehrnschwender
  • Method for removing sulfur dioxide, mercury, and nitrogen oxides from a gas stream
    Publication number: 20060239877
    Abstract: Methods for scrubbing gas streams to remove acid gases including sulfur dioxide, mercury-containing substances, and/or nitrogen oxides from the gas stream. The gas stream is contacted with a potassium-based sorbent effective for removing at least a portion of the acid gases. The partially cleaned gas stream is then contacted with an oxidant effective to remove at least a portion of the nitrogen oxides and/or mercury-containing substances after partially removing the acid gas substance.
    Type: Application
    Filed: April 21, 2005
    Publication date: October 26, 2006
    Applicant: EnviroSolv Energy LLC
    Inventors: Dennis Johnson, Mark Ehrnschwender
  • Integrated hydrogen sulfide absorber system for making potassium-sulfur fertilizer
    Publication number: 20060236735
    Abstract: A method of scrubbing hydrogen sulfide (H2S) from a gas stream employing a potassium-based sorbent to remove at least a portion of the H2S. This results in reaction products that are oxidized and converted into potassium-sulfur based fertilizers. The potassium based sorbent may be potassium hydroxide (KOH) made on site from potash. Hydrogen chloride (HCI) may be a byproduct when the sorbent is made from potash.
    Type: Application
    Filed: April 26, 2005
    Publication date: October 26, 2006
    Applicant: EnviroSolv Energy LLC
    Inventors: Dennis Johnson, Mark Ehrnschwender
  • High-efficiency, low-emissions cleaning method and apparatus
    Patent number: 5156173
    Abstract: A cleaning apparatus that provides for immersion cleaning in one or two solvents. Using a source of inert gas and a recycling loop, the apparatus provides a drying zone above the solvents and prevents escape of solvent vapor into the surrounding atmosphere. The recycling loop maintains nonequilibrium vapor conditions and includes a centrifugal separator, which facilitates separation and recovery of the solvent vapors and the inert gas during normal operation of the system.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: October 20, 1992
    Assignee: Envirosolv
    Inventors: Gene E. Keyser, Robert L. Klopfenstein