For Hydrogen Peroxide Patents (Class 423/272)
  • Patent number: 10647576
    Abstract: A process includes preparing a crude aqueous hydrogen peroxide solution by auto-oxidation of at least one alkylanthraquinone in a working solution that includes at least one organic solvent and the at least one alkylanthraquinone; and washing the crude aqueous hydrogen peroxide solution with a mixture of at least one organic solvent and an organophosphorous chelating agent to create a purified aqueous hydrogen peroxide solution having less than 100 ppb Cr; wherein the organic solvent used for the washing is not part of the working solution and is not recycled into it.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: May 12, 2020
    Assignee: Solvay SA
    Inventors: Juan-Teva Carlier, Pierre Dournel, Henk Venbrux, Hooghe Lieven
  • Patent number: 10099924
    Abstract: Process for manufacturing a purified aqueous hydrogen peroxide solution, in which a crude aqueous hydrogen peroxide solution is subjected to a washing operation with at least one organic solvent, and wherein an organophosphorus chelating agent is added to the organic solvent.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: October 16, 2018
    Assignee: Solvay SA
    Inventors: Juan-Teva Carlier, Pierre Dournel, Henk Venbrux, Hooghe Lieven
  • Patent number: 10039696
    Abstract: A water-based, alcohol-free, skin and hard surfaces sanitizing solution with a natural skin softener, where the nature of the biocidal enhancer used in the process of making the solution significantly increases efficacy while simultaneously enabling much more economical manufacturing, processing and transportation of the product. As the present solution is water-based, no further moisturizing additives are required, and those with sensitive skin, diabetes, allergies or religious beliefs are able to use the product without concern.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: August 7, 2018
    Assignee: Aphex BioCleanse Systems, Inc.
    Inventor: David J. Weaver
  • Patent number: 9353269
    Abstract: Reactive compositions are provided, having biocidal and chemical decontamination/neutralization properties, comprising a hygroscopic polymer and an active, which are useful in a variety of commercial, healthcare and military applications and a wide variety of contaminants, including without limitation chemical and biological warfare agents. The reactive compositions are renewable or rechargeable after use by exposure to an additional application of the active and do not require removal, disposal or replacement of the originally applied composition. Methods for preparing and applying the reactive compositions are disclosed.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 31, 2016
    Assignee: AMERICAN STERILIZER COMPANY
    Inventors: Herbert J. Kaiser, Miranda C. Shaver, Timothy Lee Giddens
  • Publication number: 20130236383
    Abstract: A description is given of the use of hydroxypyridones or the salts thereof for stabilizing hydrogen peroxide or hydrogen peroxide donor substances. The stabilization takes place preferably in aqueous compositions.
    Type: Application
    Filed: July 15, 2011
    Publication date: September 12, 2013
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Peter Klug, Maurice Frederic Pilz, Ute Back
  • Publication number: 20120193575
    Abstract: The present invention relates to compositions stabilized surfactant-oxidant mixtures, and methods of making and using them. For example, in some embodiments the present invention relates to adding a plant-derived surfactant to stabilize an oxidant in a liquid.
    Type: Application
    Filed: October 13, 2010
    Publication date: August 2, 2012
    Applicant: VeruTEK, Inc.
    Inventors: George E. Hoag, John B. Collins
  • Publication number: 20120070356
    Abstract: Process and device for separating liquid from a multiphase mixture contained in a vessel and comprising solid particles and at least one liquid phase forming together at least one suspension, and a gas phase in which at least part of the mixture is circulated through at least one cross-flow filter located outside the vessel, therefore separating said part of the mixture into a filtered liquid and a concentrate.
    Type: Application
    Filed: June 2, 2010
    Publication date: March 22, 2012
    Applicant: SOLVAY SA
    Inventors: Jal Rustom Dadabhoy, Massimo Fedeli, Patrick Markus Dhaese, Yvan Frans Van Hoof
  • Patent number: 7981391
    Abstract: An aqueous hydrogen peroxide solution containing i) less than 50 wppm alkali metals, alkaline earth metals or combinations thereof in total, irrespective whether the alkali or alkaline earth metals are present in cationic or complex form; ii) less than 50 wppm of amines having a pkB of less than 4.5 or the corresponding protonated compounds in total; and iii) at least 100 wppm anions or compounds that can dissociate to form anions in total, where the wppm are based on the weight of hydrogen peroxide and the concentration of hydrogen peroxide is more than 50% by weight based on the total weight of the hydrogen peroxide solution. A process for preparation of said hydrogen peroxide solution and the use of said solution in a process for epoxidation of olefins is also disclosed.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: July 19, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Jürgen Glenneberg, Wolfgang Wöll
  • Patent number: 7722847
    Abstract: An aqueous hydrogen peroxide solution containing i) less than 50 wppm alkali metals, alkaline earth metals or combinations thereof in total, irrespective whether the alkali or alkaline earth metals are present in cationic or complex form; ii) less than 50 wppm of amines having a pkB of less than 4.5 or the corresponding protonated compounds in total; and iii) at least 100 wppm anions or compounds that can dissociate to form anions in total, where the wppm are based on the weight of hydrogen peroxide and the concentration of hydrogen peroxide is more than 50% by weight based on the total weight of the hydrogen peroxide solution. A process for preparation of said hydrogen peroxide solution and the use of said solution in a process for epoxidation of olefins is also disclosed.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: May 25, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Jürgen Glenneberg, Wolfgang Wöll
  • Publication number: 20100113808
    Abstract: The present invention refers to an aqueous hydrogen peroxide solution having a hydrogen peroxide concentration [H2O2] expressed as % by weight of the solution and an apparent pH of from pHmin to pHmax, such that pHmin=3.45?0.0377×[H2O2], and pHmax=3.76?0.0379×[H2O2]. The present invention also relates to a process for the preparation of said hydrogen peroxide solution and the use of said solution in a process for the epoxidation of olefins.
    Type: Application
    Filed: March 20, 2008
    Publication date: May 6, 2010
    Applicant: SOLVAY (SOCIETE ANONYME)
    Inventors: Armin T. Liebens, Jean-Pierre Ganhy, Jean-Pierre Catinat, Koen Vermeiren
  • Patent number: 7504356
    Abstract: A synthetic catalyst providing superoxide dismutase activity consists essentially of monodispersed nanoparticles of cerium oxide having a crystal lattice containing cerium in mixed valence states of Ce3+ and Ce4+ wherein the Ce4+ valence state predominates and containing an enhanced Ce3+/Ce4+ ratio and an effective number of oxygen vacancies in the crystal lattice so as to increase catalytic efficiency. A method of making the synthetic catalyst includes dissolving hydrous Ce(NO3)3 in water so as to form a solution, stirring the solution, adding hydrogen peroxide, heating and stopping when the solution develops a light yellow color.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: March 17, 2009
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: William T. Self, Sudipta Seal
  • Patent number: 7459005
    Abstract: The invention relates to an aqueous solution consisting essentially of: (a) hydrogen peroxide; (b) at least one compound selected from the group consisting of complexing agents based on phosphonic acids, salts and degradation products thereof in an amount from about 10 to about 60 wt % based on the amount of hydrogen peroxide; (c) water; and (d) components other than (a) through (c) in an amount from 0 up to about 10 wt % based on the amount of hydrogen peroxide The invention further concerns a soil oxygenation or micronutrient composition comprising hydrogen peroxide, a process for its preparation, and a process for the oxygenation of soil.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: December 2, 2008
    Assignee: Akzo Nobel N.V.
    Inventors: David C. Lovetro, David J. Bonislawski, Laural C. Webb
  • Patent number: 7431775
    Abstract: A stabilized basic aqueous liquid detergent composition is disclosed. The composition comprises hydrogen peroxide, a hydrogen peroxide stabilizer or a mixture of hydrogen peroxide stabilizers, an anionic surfactant or mixture of anionic surfactants, a non-ionic surfactant or mixture of anionic surfactants, and a builder or a mixture of builders. The composition maintains a homogeneous single phase, maintains active oxygen level, and gives a high level of cleaning performance.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: October 7, 2008
    Assignee: Arkema Inc.
    Inventors: Xue Wang, Keith R. Genco, Donn Rubingh
  • Patent number: 7351764
    Abstract: Mechanical or Chemical pulp is treated with about 0.01 weight % to about 5 weight % of a Mixture. The Mixture is water; diethylenetriaminepentakis(methyl)phosphonic acid or its known salts; polyacrylic acid or its known salts; and optionally one or more inert compounds. This Mixture acts to either maintain the brightness level of the pulp at the target level or to increase the brightness level of the pulp. In addition the Mixture allows for maintaining the pulp at the target level of brightness even when the amounts of other ingredients, such as hydrogen peroxide, hydrosulfite, sodium silicate and magnesium, that are typically added to the pulp, are reduced.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: April 1, 2008
    Assignee: Nalco Company
    Inventors: Sergey M. Shevchenko, Prasad Y. Duggirala
  • Patent number: 7341636
    Abstract: A stabilized basic aqueous hydrogen peroxide composition is disclosed. The composition contains about 0.3 wt % to about 15 wt % of hydrogen peroxide; water; and a stabilizer system that contains about 10 ppm to about 1% of a stannate stabilizer; 10 ppm to about 1% of a phosphonic acid chelating agent or a mixture of phosphonic acid chelating agents; and 10 ppm to about 1% of an aromatic chelating agent or a mixture of aromatic chelating agents. The composition comprises less than 10 ppm pyrophosphate, preferably no pyrophosphate; and has a pH greater than 7.0, preferably about 8.0 to about 10.5.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: March 11, 2008
    Assignee: Arkema Inc.
    Inventors: Xue Wang, Keith Robert Genco
  • Patent number: 7169237
    Abstract: A stabilized basic aqueous hydrogen peroxide composition is disclosed. The composition contains about 0.3 wt % to about 15 wt % of hydrogen peroxide; water; and a stabilizer system that contains about 10 ppm to about 1% of a stannate stabilizer; 10 ppm to about 1% of a phosphonic acid chelating agent or a mixture of phosphonic acid chelating agents; and 10 ppm to about 1% of an aromatic chelating agent or a mixture of aromatic chelating agents. The composition comprises less than about 10 ppm pyrophosphate, preferably no pyrophosphate; and has a pH greater than 7.0, preferably about 8.0 to about 10.5.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: January 30, 2007
    Assignee: Arkema Inc.
    Inventors: Xue Wang, Keith Robert Genco
  • Patent number: 6756028
    Abstract: A continuous catalytic hydrogenation process, in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen and the hydrogenation catalyst suspended in the reaction mixture is recirculated in a reactor. Part of the hydrogenation product is removed from the reactor and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process the substance to be hydrogenated and the hydrogen are mixed before entering the reactor. A venturi nozzle is particularly suitable as the mixing device.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: June 29, 2004
    Assignee: Degussa AG
    Inventors: Peter Korl, Bernhard Maurer
  • Publication number: 20040101461
    Abstract: The invention relates to an aqueous solution consisting essentially of:
    Type: Application
    Filed: November 22, 2002
    Publication date: May 27, 2004
    Inventors: David C. Lovetro, David J. Bonislawski, Laural C. Webb
  • Publication number: 20040101462
    Abstract: An aqueous hydrogen peroxide solution containing i) less than 50 wppm alkali metals, alkaline earth metals or combinations thereof in total, irrespective whether the alkali or alkaline earth metals are present in cationic or complex form; ii) less than 50 wppm of amines having a pkB of less than 4.5 or the corresponding protonated compounds in total; and iii) at least 100 wppm anions or compounds that can dissociate to form anions in total, where the wppm are based on the weight of hydrogen peroxide and the concentration of hydrogen peroxide is more than 50% by weight based on the total weight of the hydrogen peroxide solution. A process for preparation of said hydrogen peroxide solution and the use of said solution in a process for epoxidation of olefins is also disclosed.
    Type: Application
    Filed: September 24, 2003
    Publication date: May 27, 2004
    Inventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Jurgen Glenneberg, Wolfgang Woll
  • Patent number: 6696093
    Abstract: The present invention is a method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin, to the solution (or slurry). The inventors have discovered that aldehyde donors significantly reduce the decomposition of hydrogen peroxide by catalase and other peroxide decomposing enzymes, which are often present in recycled paper. As a result, less hydrogen peroxide needs to be added to a solution to effectively bleach organic matter in the solution. Furthermore, aldehyde donors are safe to handle and cost effective. Another embodiment is a method of bleaching recycled papers in a circulating water slurry comprising organic matter. The method comprises adding hydrogen peroxide and an aldehyde donor to the slurry.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: February 24, 2004
    Assignees: Lonza Inc., Lonza Ltd., Omnia-Chem Ltd.
    Inventors: Bill Ney, Richard Sinden, Philip Gerdon, Patrick Jay Lutz, Olga Borokhov, Steve Finch
  • Patent number: 6677466
    Abstract: The invention relates to the use of one or more &agr;-keto carboxylic acid esters and/or aldehyde carboxylic acid esters for stabilizing hydrogen peroxide during enzyme-catalyzed or metal-catalyzed oxidation reactions in organic synthesis, as well as for stabilizing hydrogen peroxide or aqueous or organic hydrogen peroxide solutions during production, storage and transport.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: January 13, 2004
    Assignee: DSM Fine Chemicals Austria NFG GmbH & Co KG
    Inventor: Paulus Lambertus Alsters
  • Patent number: 6576213
    Abstract: The invention relates to method of producing chlorine dioxide comprising the steps of: providing a reactor with an aqueous acidic reaction medium containing chlorate ions; reacting said chlorate ions with hydrogen peroxide as a reducing agent in such proportions that chlorine dioxide is formed; withdrawing the chlorine dioxide from the reaction medium; wherein the content of tin in the reaction medium at steady state is maintained below 20 mg Sn per kg reaction medium.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: June 10, 2003
    Assignee: EKA Chemicals, Inc.
    Inventors: Helena Falgén, Johan Landfors, Kaj Kangasniemi
  • Publication number: 20030095917
    Abstract: The invention relates to an aqueous composition of, up to about 90 wt %, hydrogen peroxide, comprising from about 0.05 to about 20 mmol/kg H2O2 of amino tri (methylenephosphonic acid), or salts or degradation products thereof, and a corrosion corrosion inhibitor, being either substantially free from or containing less than about 0.1 mole/l chlorate ions, having a tin content from 0 to about 100 mg/kg H2O2, and having a chloride content less than about 10 mg Cl−kg H2O2. The invention also relates to a process for producing chlorine dioxide where said composition is used as a feed.
    Type: Application
    Filed: July 26, 2002
    Publication date: May 22, 2003
    Inventors: Debra Wilcox, Mikael Siverstrom, Gunilla Jadesjo
  • Publication number: 20030086853
    Abstract: The invention concerns a method for making an aqueous solution of hydrogen peroxide. More particularly, it concerns a method for making hydrogen peroxide directly from hydrogen and oxygen, finely dispersed in an aqueous acid medium comprising a catalyst and at least a surfactant. The invention also concerns a device for implementing said method.
    Type: Application
    Filed: September 10, 2002
    Publication date: May 8, 2003
    Inventor: Michel Devic
  • Publication number: 20020179262
    Abstract: The present invention is a method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin, to the solution (or slurry). The inventors have discovered that aldehyde donors significantly reduce the decomposition of hydrogen peroxide by catalase and other peroxide decomposing enzymes, which are often present in recycled paper. As a result, less hydrogen peroxide needs to be added to a solution to effectively bleach organic matter in the solution. Furthermore, aldehyde donors are safe to handle and cost effective. Another embodiment is a method of bleaching recycled papers in a circulating water slurry comprising organic matter. The method comprises adding hydrogen peroxide and an aldehyde donor to the slurry.
    Type: Application
    Filed: April 12, 2002
    Publication date: December 5, 2002
    Applicant: Lonza, Inc.
    Inventors: Bill Ney, Richard Sinden, Philip Gerdon Sweeny, Patrick Jay Lutz, Olga Borokhov
  • Patent number: 6379711
    Abstract: Phosphomolybdic acid and partial alkali salts of phosphomolybdic acid are used as stabilizers for aqueous hydrogen peroxide.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: April 30, 2002
    Assignee: Crompton Corporation
    Inventors: Peter Frenkel, Ted M. Pettijohn
  • Patent number: 6224845
    Abstract: Process for manufacturing a purified aqueous hydrogen peroxide solution, in which a crude aqueous hydrogen peroxide solution is subjected to a washing operation with at least one organic solvent which has been subjected to a purification treatment prior to the washing operation. Aqueous hydrogen peroxide solution with a TOC, defined according to ISO standard 8245, of less than or equal to 72 mg/l.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: May 1, 2001
    Assignee: Solvay S.A.
    Inventors: Pascal Pennetreau, Alain Vandenbussche
  • Patent number: 5770739
    Abstract: An apparatus and process for hydrogen peroxide vapor sterilization of medical instruments and similar devices make use of hydrogen peroxide vapor released from a substantially non-aqueous organic hydrogen peroxide complex, such as a urea-peroxide complex. Optionally, a plasma can be used in conjunction with the vapor. A method for preparing substantially non-aqueous hydrogen peroxide complexes is also provided. These complexes are useful as a source of peroxide vapor in hydrogen peroxide vapor sterilizers and as a component of self-sterilizing packaging materials.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: June 23, 1998
    Assignee: Johnson & Johnson Medical, Inc.
    Inventors: Szu-Min Lin, James Archie Swanzy, Paul Taylor Jacobs
  • Patent number: 5362412
    Abstract: A process of stabilizing bleaching agents in a detergent composition using a nonphosphorus-containing biodegradable stabilizer. The process involves incorporating into a detergent composition containing a bleaching agent, a biodegradable compound of the formula ##STR1## in which m is NR' or sulfur; X is SO.sub.3 H or COOH; Y is hydrogen, SO.sub.3 H or COOH; R and R' are, independently, hydrogen, --CH(Z)CH.sub.2 (Z'), --CH(Z)CH(Z')(Z") or --CH.sub.2 COOH; and Z, Z' and Z" are, independently, hydrogen, OH, SO.sub.3 H or COOH; or a sodium, potassium or ammonium salt thereof, in an amount sufficient to stabilize the bleaching agent. Novel detergent compositions containing the biodegradable bleach stabilizers are also disclosed.
    Type: Grant
    Filed: April 17, 1991
    Date of Patent: November 8, 1994
    Assignee: Hampshire Chemical Corp.
    Inventors: JudithAnn R. Hartman, Richard P. Woodbury
  • Patent number: 5302311
    Abstract: In cleaning a semiconductor substrate with a basic aqueous solution of hydrogen peroxide, it is an object to prevent metal impurities adhering to the substrate surface. A cleaning solution of a semiconductor substrate which comprises a basic aqueous solution of a hydrogen peroxide containing a chelating agent having at least two phosphonic acid groups. Preferred chelating agent is 1,2-propylenediamine tetra(methylene phosphonic acid) in amount of 1 ppb to 1000 ppm, together with 0.1 to 20% by weight of hydrogen peroxide and, optionally, 0.1 to 10% by weight of ammonia. Even if the cleaning solution is contaminated with metal impurities, characteristics of semiconductor elements prepared from a substrate are stabilized since no metal impurities adhere on the substrate surface.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: April 12, 1994
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Yasuo Sugihara, Kazushige Tanaka, Michiya Kawakami
  • Patent number: 5211927
    Abstract: An acidic aqueous hydrogen peroxide solution containing copper can be stabilized by adding an amino acid having the formula ##STR1## wherein Ar is an aromatic group.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: May 18, 1993
    Assignee: Tokai Denka Kogyo Kabushiki Kaisha
    Inventors: Katsutoshi Itani, Yoko Miyashiro
  • Patent number: 5206385
    Abstract: Urea-hydrogen peroxide-polyvinylpyrrolidone (PVP) in the form of a free-flowing powder is stable against decomposition in water and alcohol solvents. The product is obtained by spraying an aqueous solution of urea-hydrogen peroxide onto a fluidized bed of PVP and drying; it contains about 5%-20% by weight H.sub.2 O.sub.2 and less than about 5% water. The urea-hydrogen peroxide solution is applied onto the fluidized PVP bed at a predetermined rate, suitably about 0.5-30 g of solution/minute/kg PVP in the bed, and, preferably, about 1-3 g/min/kg PVP.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: April 27, 1993
    Assignee: ISP Investments Inc.
    Inventors: Robert B. Login, John J. Merianos, Russell B. Biss, Paul Garelick
  • Patent number: 5183901
    Abstract: Urea-hydrogen peroxide-polyvinylpyrrolidone (PVP) in the form of a free-flowing powder is stable against decomposition in water and alcohol solvents. The product is obtained by spraying an aqueous solution of urea-hydrogen peroxide onto a fluidized bed of PVP and drying; it contains about 5%-20% by weight H.sub.2 O.sub.2 and less than about 5% water. The urea-hydrogen peroxide solution is applied onto the fluidized PVP bed at a predetermined rate, suitably about 0.5-30 g of solution/minute/kg PVP in the bed, and, preferably, about 1-3 g/min/kg PVP.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: February 2, 1993
    Assignee: ISP Investments Inc.
    Inventors: Robert B. Login, John J. Merianos, Russell B. Biss, Paul Garelick
  • Patent number: 5180514
    Abstract: Aqueous peroxide bleaching compositions including organic components such as surfactants, fluorescent whiteners and dyes are effectively stabilized by the addition of a stabilizing system comprising stabilizing effective amounts of a heavy metal chelating or sequestering agent and an aromatic amine free radical scavenging agent. Both agents must be present to achieve maximum stability. The aromatic amine free radical scavenging agent is preferably a primary or secondary aryl amine having at least one hydrogen on the nitrogen of the amine. The stabilizing system stabilizes the organic component as well as the peroxide oxidizing agent.
    Type: Grant
    Filed: December 6, 1990
    Date of Patent: January 19, 1993
    Assignee: The Clorox Company
    Inventors: James P. Farr, Daniel T. Carty
  • Patent number: 5130053
    Abstract: Concentrated solutions of hydrogen peroxide tend to decompose on storage, thereby losing their effectiveness, amongst other reasons by virtue of interaction with contaminating transition metals.Peroxygen compounds are stabilized by contact with a stabilizing amount of compound of general formula: ##STR1## in which X represents a methylene phosphonic acid group of formula --CH.sub.2 --(--PO.sub.3 H.sub.2) or salt thereof, R represents a tetra methylene diradical, optionally alkyl-substituted, that completes a cyclo-aliphatic ring and thereby establishes the two NX.sub.2 groups in a substantially fixed configuration and Y represents a hydrogen or lower alkyl group.Preferably, the solutions contain additionally one or more co-stabilizers, including stannate, phosphates, hydroxybenzoic acid, citric acid and nitrate.The stabilizer system can enable the solution to be diluted, even with municipal water.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: July 14, 1992
    Assignee: Interox Chemicals Limited
    Inventors: Neil D. Feasey, Gareth W. Morris
  • Patent number: 5122354
    Abstract: A crystallized, stable histidine-hydrogen peroxide adduct intermolecular-bonded at 1:1 ratio is provided.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: June 16, 1992
    Assignee: Tokai Denka Kogyo Kabushiki Kaisha
    Inventors: Kuniro Tsuji, Haruo Nukaya, Yasuhiro Kanaya
  • Patent number: 5045296
    Abstract: A process is provided to react anhydrous carbonate with a particle size between 300 and 74 micrometers and hydrogen peroxide containing a hydroxyalkylidene diphosphonic acid to produce sodium carbonate perhydrate containing 13% to 141/2% active oxygen. The process differs from the prior art in that reaction mixture is substantially dry at all times. The product is stable even without added stabilizers.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: September 3, 1991
    Assignee: FMC Corporation
    Inventors: Henry A. Pfeffer, Charles Adams, Jr.
  • Patent number: 5008036
    Abstract: A colloidal dispersion of hydrous antimony pentoxide particles is made by a process which comprises introducing a particulate antimony component selected from the group consisting of antimony metal and antimony trioxide into an essentially aqueous medium and contacting said antimony component with hydrogen peroxide at a temperature of from about 0.degree. C. to about the decomposition temperature of the reaction mixture for a length of time sufficient to convert at least a portion of the antimony component to colloidal particles of hydrous antimony pentoxide.
    Type: Grant
    Filed: August 18, 1975
    Date of Patent: April 16, 1991
    Assignee: Laurel Industries, Inc.
    Inventors: Charles E. Crompton, Abdulla M. Z. Kazi, Inderjit S. Soni
  • Patent number: 5008093
    Abstract: What is provided herein are substantially anhydrous complexes of PVP and H.sub.2 O.sub.2 in molar ratios of between about 2:1 and 1:1, respectively, which corresponds to between about 13% and about 23% by weight H.sub.2 O.sub.2. The complexes of the invention are prepared by an anhydrous process whereby substantially uniform, free-flowing, fine white powders are obtained.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: April 16, 1991
    Assignee: GAF Chemicals Corporation
    Inventor: John J. Merianos
  • Patent number: 4981662
    Abstract: A stable hydrogen peroxide composition is provided of from 1% to 52% by weight hydrogen peroxide and 1,10-phenanthroline. The composition may contain other conventional additives suitable for stabilizing hydrogen peroxide.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: January 1, 1991
    Assignee: FMC Corporation
    Inventor: Edward F. Dougherty
  • Patent number: 4970058
    Abstract: A novel composition of matter is claimed comprising particles which appear to comprise sodium carbonate, sodium percarbonate (also called sodium carbonate peroxide or sodium carbonate perhydrate), and a stabilizer for the compound, preferably a diphosphonic acid, the sodium carbonate being present in sufficient quantity to form sodium carbonate monohydrate by reacting with the available water in the composition.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: November 13, 1990
    Assignee: FMC Corporation
    Inventors: William A. Hills, Henry A. Pfeffer
  • Patent number: 4966762
    Abstract: A novel process is claimed for manufacturing a composition of matter comprising particles which appear to comprise sodium carbonate, sodium carbonate peroxide and a stabilizer such as, a disphosphonic acid, the anhydrous sodium carbonate being present in sufficient quantity to form sodium carbonate monohydrate by reacting with all of the water formed on decomposition of the sodium percarbonate.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: October 30, 1990
    Assignee: FMC Corporation
    Inventors: Henry A. Pfeffer, William A. Hills
  • Patent number: 4900468
    Abstract: Aqueous peroxide bleaching compositions that include surfactant, fluorescent whiteners and dyes are effectively stabilized by the addition of a heavy metal chelating agent and a free radical scavenging agent. Both agents must be present to achieve maximum stability. Particularly preferred chelating agents are the amino polyphosphonates. Particularly preferred free radical scavenging agents are the hydroxybenzenes and especially substituted phenols. Not only is the peroxide oxidizing agent stabilized, but surfactant, fluorescent whitener, and dye as well.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: February 13, 1990
    Assignee: The Clorox Company
    Inventors: James D. Mitchell, James P. Farr
  • Patent number: 4900469
    Abstract: A thickened cleaning composition for laundry products incorporates low levels of a fluorescent whitening agent or dye, a surfactant, an acidic pH adjusting agent and an insoluble peracid precursor. At the acidic pH, the fluorescent whitening agent precipitates as a colloidal particle, and is stabilized by associating with the surfactant, resulting in thickening. The precursor is stably suspended in its inactive form in the thickener, and provides oxidizing power as the corresponding peracid is formed when added to an alkaline wash or rinse solution. The composition preferably is formulated with an acidic soluble bleach source and most preferably with a peroxygen bleach.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: February 13, 1990
    Assignee: The Clorox Company
    Inventors: James P. Farr, Daniel T. Carty
  • Patent number: 4889689
    Abstract: A method of disinfecting a soft contact lens with a stabilized aqueous hydrogen peroxide solution having a pH between about 5.5 and about 7.5, a hydrogen peroxide content of between about 0.5 and about 6% by weight, and containing between about 0.003 and about 0.03% by weight of diethylene triamine penta(methylenephosphonic acid) or a physiologically compatable salt thereof, and compositions for use in such method.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: December 26, 1989
    Assignee: Ciba-Geigy Corporation
    Inventor: Fupao Tsao
  • Patent number: 4850729
    Abstract: A decontaminating composition and delivery system therefor. The decontaminating composition is prepared by combining a "per-salt", an activator for hydrogen peroxide which effects free radical formation, both of which are in a dry form and an aqueous solution comprised of a nonvolatile alcohol and a surface active agent. The "per-salt" of the present invention is a basic water-soluble salt such as percarbonate, perborate, persilicate or perphosphate which releases hydrogen peroxide in aqueous solution. While not true per-salts in the strict chemical sense, they are otherwise conventional salts containing hydrogen peroxide of crystallization which is released in aqueous solution. The decontaminating composition and delivery system comprise a dispenser containing, in separate compartments, the various components as aforesaid which are thoroughly mixed prior to being dispensed onto the surface to be treated.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: July 25, 1989
    Assignee: David N. Kramer
    Inventors: David N. Kramer, Philip A. Snow
  • Patent number: 4849198
    Abstract: Particulate, active-oxygen compounds, especially sodium percarbonate, tend to cake during storage, which makes it more difficult to handle them. The invention reduces this caking tendency while the active-oxygen content remains essentially unchanged. The method of achieving this comprises bringing the active-oxygen compound in contact with such an amount of an aqueous solution containing one or more phosphonic acid compounds capable of chelate complex formation that the weight ratio of active-oxygen compound to phosphonic acid compound is 100:0.1 to 100:10, preferably 100:1 to 100:3, and subsequent drying.Sodium percarbonate is used in particular as active-oxygen compound and 1-hydroxyethane-1,1-diphosphonic acid as a 3 to 30% by weight aqueous solution is used as phosphonic acid compound. Sodium percarbonate wet salt is preferably washed with this solution, freed of excess solution and dried. Percarbonate treated in this manner hardly tends to cake at all and exhibits a greater active-oxygen stability.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: July 18, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventor: Alexander Ruhs
  • Patent number: 4812173
    Abstract: Stabilized hydrogen peroxide disinfecting solutions containing diphosphonic acids (such as hydroxyethylidene diphosphonic acid), and glycerin are disclosed along with a disinfection method.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: March 14, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Fu-Pao Tsao, M. Alicja Sills
  • Patent number: 4770808
    Abstract: Unless aqueous acidic hydrogen peroxide solutions are stabilized, an excessive rate of decomposition of hydrogen peroxide precludes their use for treatment of metal surfaces, such as of copper and copper alloys, during which use substantial concentrations of decomposition catalysts build-up in solution. Regular monitoring of the solutions for residual stabilizer content would demand sophisticated analytical equipment beyond the reach of many users.The invention provides a stabilizer in the form of a block of sparingly soluble material, whereby monitoring can be simply and readily effected visually or by a simple electrical or mechanical detection system. For copper/copper alloys preferred stabilizers are p-hydroxybenzoic acid and triphenyl carbinol.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: September 13, 1988
    Assignee: Interox Chemicals Limited
    Inventors: Colin F. McDonogh, David B. Mobbs
  • Patent number: 4744968
    Abstract: This invention relates to a novel stabilized aqueous hydrogen peroxide solution which comprises hydrogen peroxide in admixture with an aromatic polysulfonic acid, or a salt thereof.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: May 17, 1988
    Assignee: Technicon Instruments Corporation
    Inventors: Michael J. Malin, Louis D. Sclafani