Patents by Inventor Bruce A. Keiser

Bruce A. Keiser 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).

  • Publication number: 20190300429
    Abstract: Additives including sulfur-containing compounds are used in methods of treating synthetic gypsum. The additives can thermally stabilize heavy metals, such as mercury. This thermal stabilization reduces mercury release from the synthetic gypsum. Illustrative, non-limiting examples of sulfur-containing compounds include inorganic sulfides, organic sulfides, organic compounds containing nitrogen and sulfur, organic compounds containing oxygen and sulfur, and polymers containing sulfur.
    Type: Application
    Filed: August 7, 2017
    Publication date: October 3, 2019
    Applicant: ECOLAB USA INC.
    Inventors: Bruce A. Keiser, Wayne M. Carlson, Nicholas R. Denny, Jianwei Yuan, Tommy Hung-Ting Chen
  • Publication number: 20190039019
    Abstract: A method for the reduction and prevention of mercury emissions into the environment from combusted fossil fuels or other off-gases with the use of peracetic acid is disclosed. The peracetic acid is used for the capture of mercury from the resulting flue gases using a flue gas desulfurization system or scrubber. The method uses peracetic acid in conjunction with a scrubber to capture mercury and lower its emission and/or re-emission with stack gases. The method allows the use of coal as a cleaner and environmentally friendlier fuel source as well as capturing mercury from other processing systems.
    Type: Application
    Filed: October 10, 2018
    Publication date: February 7, 2019
    Applicant: ECOLAB USA INC.
    Inventors: Nicholas R. Denny, Bruce A. Keiser, David M. Dotzauer, Wayne M. Carlson
  • Patent number: 10173225
    Abstract: A process of treating a gas stream containing at least one mercury compound or species, the process comprising: applying a composition into said gas stream ahead of a particulate matter collection device, wherein said composition contains a compound having the following formula (SiO2)x(OH)yMzSaF, wherein (i) SiO2 is an optional component; (ii) M comprises at least one of the following metal or metalloid cations: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; (iii) S comprises a sulfur-based species selected from at least one of the following: sulfide salts, dithiocarbamates, polymer-based dithiocarbamates, and polysulfide salts; (iii) F is an optional component and if present comprises at least one of the following: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area co
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 8, 2019
    Assignee: ECOLAB USA INC.
    Inventors: Nicholas S. Ergang, Bruce A. Keiser, Richard Mimna
  • Patent number: 10124290
    Abstract: A method for the reduction and prevention of mercury emissions into the environment from combusted fossil fuels or other off-gases with the use of peracetic acid is disclosed. The peracetic acid is used for the capture of mercury from the resulting flue gases using a flue gas desulfurization system or scrubber. The method uses peracetic acid in conjunction with a scrubber to capture mercury and lower its emission and/or re-emission with stack gases. The method allows the use of coal as a cleaner and environmentally friendlier fuel source as well as capturing mercury from other processing systems.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: November 13, 2018
    Assignee: ECOLAB USA INC.
    Inventors: Nicholas R. Denny, Bruce A. Keiser, David M. Dotzauer, Wayne M. Carlson
  • Publication number: 20180086650
    Abstract: Methods of modification of zero-valent iron (ZVI) to improve its performance in removing contaminants from a discharge stream. In some aspects, the methods include contacting ZVI-impregnated disks with solutions containing metal cations such as Ni2+, Cu2+, Fe2+, or Pd2+. In some aspects, a wastewater stream is treated with a metal cation solution, then passed over ZVI. Compositions for treating wastewater include ZVI that is modified with a metal cation solution.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 29, 2018
    Applicant: ECOLAB USA INC.
    Inventors: Nicholas S. Ergang, Daniel E. Schwarz, Darlington Mlambo, Bruce A. Keiser, Hung Ting Chen
  • Publication number: 20170341086
    Abstract: A process of treating a gas stream containing at least one mercury compound or species, the process comprising: applying a composition into said gas stream ahead of a particulate matter collection device, wherein said composition contains a compound having the following formula (SiO2)x(OH)yMzSaF, wherein (i) SiO2 is an optional component; (ii) M comprises at least one of the following metal or metalloid cations: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; (iii) S comprises a sulfur-based species selected from at least one of the following: sulfide salts, dithiocarbamates, polymer-based dithiocarbamates, and polysulfide salts; (iii) F is an optional component and if present comprises at least one of the following: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area co
    Type: Application
    Filed: June 19, 2017
    Publication date: November 30, 2017
    Applicant: Ecolab USA Inc.
    Inventors: Nicholas S. Ergang, Bruce A. Keiser, Richard Mimna
  • Patent number: 9764280
    Abstract: A method for the reduction and prevention of mercury emissions into the environment from combusted fossil fuels or other off-gases with the use of hypobromite is disclosed. The hypobromite is used for the capture of mercury from the resulting flue gases using a flue gas desulfurization system or scrubber. The method uses hypobromite in conjunction with a scrubber to capture mercury and lower its emission and/or re-emission with stack gases. The method allows the use of coal as a cleaner and environmentally friendlier fuel source as well as capturing mercury from other processing systems.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: September 19, 2017
    Assignee: ECOLAB USA INC.
    Inventors: Nicholas R. Denny, Bruce A. Keiser, David M. Dotzauer, Wayne M. Carlson
  • Patent number: 9682383
    Abstract: A process of treating a gas stream containing at least one mercury compound or species, the process comprising: applying a composition into said gas stream ahead of a particulate matter collection device, wherein said composition contains a compound having the following formula (SiO2)x(OH)yMzSaF, wherein (i) SiO2 is an optional component; (ii) M comprises at least one of the following: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; (iii) S comprises a sulfur-based species selected from at least one of the following: sulfide salts, dithiocarbamates, polymer-based dithiocarbamates, and polysulfide salts; (iii) F is an optional component and comprises at least one of the following: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: June 20, 2017
    Assignee: Nalco Company
    Inventors: Nicholas S. Ergang, Bruce A. Keiser, Richard Mimna
  • Publication number: 20170050145
    Abstract: A method for the reduction and prevention of mercury emissions into the environment from combusted fossil fuels or other off-gases with the use of hypobromite is disclosed. The hypobromite is used for the capture of mercury from the resulting flue gases using a flue gas desulfurization system or scrubber. The method uses hypobromite in conjunction with a scrubber to capture mercury and lower its emission and/or re-emission with stack gases. The method allows the use of coal as a cleaner and environmentally friendlier fuel source as well as capturing mercury from other processing systems.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 23, 2017
    Applicant: ECOLAB USA Inc.
    Inventors: Nicholas R. Denny, Bruce A. Keiser, David M. Dotzauer, Wayne M. Carlson
  • Publication number: 20170050147
    Abstract: A method for the reduction and prevention of mercury emissions into the environment from combusted fossil fuels or off-gases having mercury with the use of hypoiodite is disclosed. The hypoiodite is used for the capture of mercury from the resulting flue gases using a flue gas desulfurization system or scrubber. The method uses hypoiodite in conjunction with a scrubber to capture mercury and lower its emission and/or re-emission with stack gases. The method allows the use of coal as a cleaner and environmentally friendlier fuel source as well as capturing mercury from other processing systems.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 23, 2017
    Applicant: ECOLAB USA Inc.
    Inventors: Nicholas R. Denny, Bruce A. Keiser, Wayne M. Carlson
  • Publication number: 20170050146
    Abstract: A method for the reduction and prevention of mercury emissions into the environment from combusted fossil fuels or other off-gases with the use of peracetic acid is disclosed. The peracetic acid is used for the capture of mercury from the resulting flue gases using a flue gas desulfurization system or scrubber. The method uses peracetic acid in conjunction with a scrubber to capture mercury and lower its emission and/or re-emission with stack gases. The method allows the use of coal as a cleaner and environmentally friendlier fuel source as well as capturing mercury from other processing systems.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 23, 2017
    Applicant: ECOLAB USA Inc.
    Inventors: Nicholas R. Denny, Bruce A. Keiser, David M. Dotzauer, Wayne M. Carlson
  • Patent number: 9555420
    Abstract: A process of treating a gas stream containing mercury is disclosed.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: January 31, 2017
    Assignee: Nalco Company
    Inventors: Bruce A. Keiser, Nicholas S. Ergang, Richard Mimna
  • Patent number: 9387435
    Abstract: Disclosed are methods for the on-site manufacture of aqueous-based mercury sorbent compositions prepared using a process water. The sorbent compositions may be aqueous-based materials manufactured from a silica containing precursor, a metal species, and a sulfur-based species, in the presence of a process waters, such as a process water from a coal-fired power plant.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 12, 2016
    Assignee: Ecolab USA Inc.
    Inventors: Nicholas S. Ergang, Bruce Keiser, Rebecca Stiles, Brett Showalter
  • Patent number: 9387434
    Abstract: Disclosed herein are methods for the on-site manufacture of aqueous-based mercury sorbent compositions prepared using a process water. The sorbent compositions may be aqueous-based materials manufactured from a silica containing precursor, a metal species, and a sulfur-based species, in the presence of a process waters, such as a process water from a coal-fired power plant.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 12, 2016
    Assignee: Ecolab USA Inc.
    Inventors: Nicholas S. Ergang, Bruce Keiser, Rebecca Stiles, Brett Showalter
  • Patent number: 9328003
    Abstract: The invention provides methods and compositions for separating metals from a liquid medium, the method uses a copolymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals are disclosed. The treated liquid is then passed through a filtration system. The scavenging effect of the combination of the treatment with the filtration is unexpectedly greater than the sum of its parts.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: May 3, 2016
    Assignee: Nalco Company
    Inventors: Deepak A. Musale, Daniel E. Schwarz, Paul J. Zinn, Bruce A. Keiser, Jitendra T. Shah
  • Patent number: 9023302
    Abstract: Methods for facilitating the removal of mercury from flue gases by converting elemental mercury to oxidized mercury and subsequently capturing the oxidized mercury. In one aspect, a method of removing mercury from a mercury-containing flue gas may include the steps of introducing into the flue gas a sulfide source in an effective amount to convert elemental mercury to gaseous oxidized mercury and then capturing the gaseous oxidized mercury.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: May 5, 2015
    Assignee: Ecolab USA Inc.
    Inventors: Bruce A. Keiser, Richard Mimna, Nicholas S. Ergang, Robert W. Dorner, Jianwei Yuan, Hung-Ting Chen
  • Patent number: 9017649
    Abstract: A method of stabilizing silica-containing anionic microparticles upon mixing of the silica-containing anionic microparticles with hard water comprising adding one or more hardness-abating additives to the hard water prior to mixing of the hard water and the silica-containing anionic microparticles; or adding an effective stabilizing amount of one or more hardness-abating agents to the silica-containing anionic microparticles prior to mixing of the hard water with the silica-containing anionic microparticles and a stabilized composition comprising silica-containing anionic microparticles and an effective stabilizing amount of one or more hardness-abating additives.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: April 28, 2015
    Assignee: Nalco Company
    Inventors: Bruce A. Keiser, Raymond D. Miller, Jr., Linda S. Strysik, David A. Grattan
  • Patent number: 8974762
    Abstract: Methods of forming a silica-containing products are disclosed. One method comprises: (a) providing a silica containing precursor (SCP) contained in solution that has a pH less than or equal to a pH of 7; (b) optionally doping the SCP with one or more metal species; (d) adding an effective amount of salt to the solution so that the conductivity of the solution is greater than or equal to 4 mS; (e) optionally filtering and drying the SCP; and (f) optionally reacting the dried product from step e with a functional group. Another method comprises: (a) providing a silica containing precursor (SCP) contained in solution that has a pH greater than 7; (b) adjusting the pH of the solution to less than or equal to 7; (c) optionally doping the SCP with one or more metal species; (d) adjusting the pH of the solution to greater than 7; and (e) adding an effective amount of salt to the solution so that the conductivity of the solution is greater than or equal to 4 mS; (f) optionally filtering and drying the SCP.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: March 10, 2015
    Assignee: Nalco Company
    Inventors: Nicholas S. Ergang, Bruce A. Keiser, Richard Mimna, Brett Showalter, Ian Saratovsky, Hung-Ting Chen
  • Patent number: 8936772
    Abstract: A silica containing composition is disclosed. The silica composition comprising a compound having the following formula (SiO2)x(OH)yMzOaF: wherein M optionally exists and said M is at least one of the following metal or metalloid cations: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, palladium, silver, cadmium, tin, platinum, gold, and bismuth; wherein F optionally exists and said F is at least one of the following: a functionalized organosilane, a sulfur-containing organosilane, an amine-containing organosilane, and an alkyl-containing organosilane at a surface area coverage of 0.01-100%; and wherein the molar ratio of y/x is equal to 0.01-0.5, the molar ratio of x/z is equal to 0.1-300, and the molar ratio of a/z is dependent on the nature of the metal oxide formed.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: January 20, 2015
    Assignee: Ecolab USA Inc.
    Inventors: Bruce A. Keiser, Nicholas S. Ergang, Richard Mimna
  • Patent number: 8845991
    Abstract: Methods of forming a silica-based products are disclosed. One method comprises: (a) providing a silica containing precursor (SCP) contained in solution that has a pH less than or equal to a pH of 7; (b) optionally doping the SCP with one or more metal species, wherein said doping occurs when the solution has a pH less than or equal to a pH of 7; (c) adjusting the pH of the solution to greater than 7; (d) adding an effective amount of salt to the solution so that the conductivity of the solution is greater than or equal to 4 mS, wherein said addition occurs prior to, simultaneous with, or after the pH adjustment in step 1c; (e) optionally filtering and drying the SCP; and (f) optionally reacting the dried product from step e with a functional group and optionally wherein the resultant functionalized dried product is at least one of the following: a functionalized metal oxide-doped or metal sulfide-doped silica product.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: September 30, 2014
    Assignee: Ecolab USA Inc.
    Inventors: Bruce A. Keiser, Nicholas S. Ergang, Richard Mimna, Brett M. Showalter