Oxidant Contains Halogen Other Than Chlorine Patents (Class 252/187.2)
  • Patent number: 9458034
    Abstract: Clogging of membrane by slime adhesion is efficiently prevented and stable treatment can be carried out for a long period of time at a low cost by a small amount of chemicals without membrane deterioration and trihalomethane formation, even if applied to the water having a large number of viable cell counts and a harsh water quality by supplying water to be treated to a membrane separation apparatus 4, adding intermittently to the water to be treated a combined chlorine agent containing sulfamic compound, and repeating a non-addition feeding period in which water to be treated is supplied for 6-120 hours without addition of the combined chlorine agent, and an intermittent addition feeding period in which water to be treated is supplied for 0.5-40 hours under the addition of a combined chlorine agent at a biofilm exfoliating concentration in an early stage of biofilm formation during the non-addition feeding period.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: October 4, 2016
    Assignee: KURITA WATER INDUSTRIES LTD.
    Inventors: Taeko Nakamura, Kenji Kowata, Katsumi Matsumoto
  • Publication number: 20150000187
    Abstract: A flue gas additive is provided that includes both a nitrogenous component to reduce gas phase nitrogen oxides and a halogen-containing component to oxidize gas phase elemental mercury.
    Type: Application
    Filed: September 11, 2014
    Publication date: January 1, 2015
    Applicant: ADA-ES, INC.
    Inventors: Constance Senior, Gregory M. Filippelli, Cynthia Jean Bustard, Michael D. Durham, William J. Morris, Sharon M. Sjostrom
  • Patent number: 8366961
    Abstract: This invention comprises a lightweight, portable chemical combination of reagents for sterilizing or disinfecting objects in the absence of electrical power or fire. The chemical combination includes a chemical oxidant with the capacity to liberate a biocidal intermediate, a chemical reductant of the oxidant with the capacity to react with the oxidant, and an effector to induce a reaction between the oxidant and reductant. In one embodiment, the oxidant comprises chlorite, the reductant comprises sulfite, and the effector comprises ascorbate. In another embodiment, the chemical combination comprises the oxidant, reductant, effector and iron-activated magnesium. When water or water solutions are added to either embodiment, the chemical combination generates heat, steam and a biocidal intermediate that can destroy contaminating microorganisms. In one embodiment, the biocidal intermediate is a halogen-based biocidal intermediate, such as chlorine dioxide.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: February 5, 2013
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Christopher J. Doona, Maria Agudelo Curtin, Irwin A. Taub, Kenneth Kustin
  • Patent number: 8273382
    Abstract: A composition for anti-microbial effect in a water system such as a pulp and paper processing line with an aqueous slurry. The composition comprises a free chlorine-generating biocide comprising a chlorine source, urea, and an alkali in a concentration sufficient to provide a pH greater than 10, and typically at least pH 11.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: September 25, 2012
    Assignee: Nalco Company
    Inventors: Laura E. Rice, Andrew J. Cooper, Robert L. Wetegrove, Michael V. Enzien
  • Patent number: 8182715
    Abstract: This invention comprises a lightweight, portable chemical combination of reagents for sterilizing or disinfecting objects in the absence of electrical power or fire. The chemical combination includes a chemical oxidant with the capacity to liberate a biocidal intermediate, a chemical reductant of the oxidant with the capacity to react with the oxidant, and an effector to induce a reaction between the oxidant and reductant. In one embodiment, the oxidant comprises chlorite, the reductant comprises sulfite, and the effector comprises ascorbate. In another embodiment, the chemical combination comprises the oxidant, reductant, effector and iron-activated magnesium. When water or water solutions are added to either embodiment, the chemical combination generates heat, steam and a biocidal intermediate that can destroy contaminating microorganisms. In one embodiment, the biocidal intermediate is a halogen-based biocidal intermediate, such as chlorine dioxide.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: May 22, 2012
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Christopher Doona, Maria Curtin, Irwin A. Taub, Barbara G. Taub, legal representative, Kenneth Kustin
  • Patent number: 8017032
    Abstract: A solid composition in the form of a tablet that generates and releases a biocidal solution comprising at least chlorine dioxide with an enhanced weight percent yield is presented. The composition comprises reactants capable of in-situ generation of chlorine dioxide comprising a chlorite donor that is coated with a gel-forming material that slows the rate of dissolution of the high solubility chlorite donor, a free halogen donor, and an acid source, resulting in an unexpectedly high weight percent yield and providing a controlled release of biocidal solution. The compositions of the invention show improved environmental stability which can reduce the cost of packaging and significantly increase the utility of the composition. The controlled release allows the use in multi-tablet chemical dispensers which may otherwise induce potentially explosive conditions or allow rapid release of the biocidal solution thereby inducing a spike in chemical concentration rather than a controlled and sustained release.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: September 13, 2011
    Assignee: Truox, Inc.
    Inventor: Roy W. Martin
  • Patent number: 7993545
    Abstract: A solid composition in the form of a tablet that generates and releases a biocidal solution comprising at least chlorine dioxide with an enhanced weight percent yield is presented. The composition comprises reactants capable of in-situ generation of chlorine dioxide comprising a chlorite donor that is coated with a gel-forming material that slows the rate of dissolution of the high solubility chlorite donor, a free halogen donor, and an acid source, resulting in an unexpectedly high weight percent yield and providing a controlled release of biocidal solution. The compositions of the invention show improved environmental stability which can reduce the cost of packaging and significantly increase the utility of the composition. The controlled release allows the use in multi-tablet chemical dispensers which may otherwise induce potentially explosive conditions or allow rapid release of the biocidal solution thereby inducing a spike in chemical concentration rather than a controlled and sustained release.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: August 9, 2011
    Assignee: Truox, Inc.
    Inventor: Roy W. Martin
  • Patent number: 7976725
    Abstract: An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: July 12, 2011
    Assignee: Truox, Inc.
    Inventor: Roy William Martin
  • Patent number: 7927508
    Abstract: An efficient cyclic process and related compositions for the in-situ generation of oxyhalogens from anions of chloride, bromide and chlorite in an aqueous system using in-situ generated sulfate free radicals. The cyclic process and compositions enhance the rate of inactivation of microbiological organisms especially those resistant to inactivation from free halogen based sanitizers, and oxidation of oxidation resistant organic based compounds in aqueous solution. Aquatic facilities susceptible to accumulation of organic N-chloramines and other oxidation resistant compounds, as well as oxidation resistant parasitic organisms such as cryptosporidium and Giardia, obtain dramatic improvements in the rate of oxidation and subsequent inactivation of these undesirable contaminants.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 19, 2011
    Assignee: Truox, Inc.
    Inventor: Roy W. Martin
  • Patent number: 7927509
    Abstract: An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: April 19, 2011
    Assignee: Truox, Inc.
    Inventor: Roy William Martin
  • Patent number: 7922933
    Abstract: This invention relates to a method for enhanced sanitation and oxidation of aqueous solutions at aquatic facilities. The method provides a means for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH, and enhanced inactivation rates of microbiological organisms including cryptosporidium.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: April 12, 2011
    Assignee: Truox, Inc
    Inventor: Roy W. Martin
  • Patent number: 7776363
    Abstract: A composition for anti-microbial effect in a water system such as a pulp and paper processing line with an aqueous slurry. The composition comprises a free chlorine-generating biocide comprising a chlorine source, urea, and an alkali in a concentration sufficient to provide a pH greater than 10, and typically at least pH 11.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: August 17, 2010
    Assignee: Nalco Company
    Inventors: Laura E. Rice, Andrew J. Cooper, Robert L. Wetegrove, Michael V. Enzien
  • Patent number: 7579018
    Abstract: Microbiological control is achieved by continuously and inexpensively dosing water in contact with biofilm, or that comes into contact with biofilm, using a highly effective biocide that provides very effective microbiocidal control of planktonic microorganisms and of biofilm species, even where the biofilm infestations have been in existence for long periods of time and thus have encased themselves in a substantial quantity of slimy defensive polysaccharide layers or films. In addition, the biocide used makes possible significant reduction in copper and/or iron surfaces in contact with the water as compared to N,N?-bromochloro- 5,5-dimethyl hydantoin. Still other advantages are made possible by the described technology.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: August 25, 2009
    Assignee: Albemarle Corporation
    Inventors: Jonathan N. Howarth, Christopher J. Nalepa, Michael J. Sanders, David L. Shelton
  • Patent number: 7459139
    Abstract: A cost-effective process is described for the preparation of a stable and non-hazardous brominating reagent containing 2:1 stoichiometric ratio of alkali bromide to alkali bromate. The process comprises of reacting alkaline bromine intermediate mixture, obtained from bromine recovery plant, with chlorine gas in the presence of a strong alkali to oxidize the bromide ions to bromate ions. This brominating reagent is useful for the bromination of aromatic compounds by substitutions.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: December 2, 2008
    Assignee: Council of Scientific and Industrial Research
    Inventors: Ramachandraiah Gadde, Pushpito Kumar Ghosh, Adimurthy Subbarayappa, Ashutosh Bedekar, Dipak Balvantrai Shukla
  • Patent number: 7371397
    Abstract: Microbiological control in aqueous media and/or eradication or reduction of biofilm on a surface in contact with such media is achieved by introducing into the aqueous medium a microbiocidally effective quantity of one or more 1,3-dibromo-5,5-dialkylhydantoins where one of the alkyls is methyl and the other is a C1-4 alkyl, wherein (i) the molar quantity of 1,3-dibromo-5,5-dialkylhydantoin introduced is less than the molar quantity of N,N?-bromochloro-5,5-dimethylhydantoin that would be required to effect the same degree of microbiological control in that medium, (ii) the molar quantity of the 1,3-dibromo-5,5-dialkylhydantoin introduced releases an amount of “free chlorine” that is greater than the amount of “free chlorine” that would be released in that medium by an equimolar quantity of N,N?-bromochloro-5,5-dimethylhydantoin, and (iii) the amount of “free chlorine” released by the quantity of the 1,3-dibromo-5,5-dialkylhydantoin introduced is greater than the amount of “free chlorine” that could be predicte
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: May 13, 2008
    Assignee: Albemarle Corporation
    Inventors: Jonathan N. Howarth, Christopher J. Nalepa, Michael J. Sanders
  • Patent number: 6814984
    Abstract: The present invention is directed to frozen biocidal compositions. Specifically, the biocidal compositions comprise a frozen aqueous solution of a plurality of ions selected from the group consisting of halide and oxyhalide ions. The frozen biocidal compositions are useful in preserving or extending the shelf-life of perishable articles.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: November 9, 2004
    Assignee: Clean Water International LLC
    Inventors: David C. Rose, Lawrence J. Ventura
  • Patent number: 6745903
    Abstract: A new method is described to produce large volumes of low cost sterile, Water-for-Injection (WFI) grade water on-line, on-demand from potable water in order to meet the needs of dialysis therapies and other biological applications for sterile, injectable grade water. The source water is processed by a combination of membrane and column chromatographic methods including reverse osmosis, chemical sterilization, reduction of iodine sterilant to iodide, deionization, endotoxin-specific adsorption and polishing filtration in order to reduce contaminant levels below those specified by the US Pharmacopoeia.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: June 8, 2004
    Inventor: Peter Grandics
  • Patent number: 6669904
    Abstract: Stabilized bromine solutions are prepared by combining a bromine source and a stabilizer to form a mixture, and then adding an oxidizer to the mixture.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: December 30, 2003
    Assignee: Ondeo Nalco Company
    Inventors: Shunong Yang, Donald A. Johnson, Robert L. Wetegrove, George J. Collias
  • Patent number: 6524403
    Abstract: A non-chrome containing composition and process are disclosed for enhancing the corrosion resistance of zinc or zinc alloy surfaces. The composition comprises a source of titanium ions or titanates, an oxidant and fluorides or complex fluorides. The composition also preferably comprises an organic acid and/or a Group II metal compound, preferably a Group II metal chloride.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: February 25, 2003
    Inventors: Ian Bartlett, Ernest Long, Anthony Rowan
  • Patent number: 6508954
    Abstract: Among the enhanced properties of the 1,3-dibromo-5,5-dimethylhydantoins described are their larger average particle sizes, their compactibility even though devoid of a binder, their excellent free-flowing and low-dust properties, and their more appealing aesthetic qualities, as compared to previously known 1,3-dibromo-5,5-dimethylhydantoins. These novel 1,3-dibromo-5,5-dimethylhydantoins can be produced, for example, by concurrently feeding (i) an aqueous solution or slurry formed from an inorganic base and 5,5-dimethylhydantoin, and (ii) a brominating agent, in proportions such that each nitrogen atom is substituted by a bromine atom, thereby forming product which precipitates in an aqueous reaction mixture. The pH of the reaction mixture is maintained in the range of about 5.5 to about 8.5.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: January 21, 2003
    Assignee: Albemarle Corporation
    Inventors: Hassan Y. Elnagar, Jonathan N. Howarth, Bruce C. Peters, Edgar E. Spielman, Jr., Dustin H. Thomas
  • Patent number: 6270722
    Abstract: Stabilized bromine solutions are prepared by combining a bromine source and a stabilizer to form a mixture, adding an oxidizer to the mixture, and then adding, an alkaline source to adjust the pH of the mixture to at least 13.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: August 7, 2001
    Assignee: Nalco Chemical Company
    Inventors: Shunong Yang, William F. McCoy, Eric J. Allain, Eric R. Myers, Anthony W. Dallmier