Additive Contains Metal, Boron, Or Silicon Patents (Class 423/273)
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Patent number: 11465121Abstract: A solid particulate reactive sorbent for decontaminating toxic chemical and biological agents and its method of making. The reactive sorbent comprising a plurality of aggregates formed from linked hydrophilic nanoparticles and individual nanoparticles that bind at least one detoxifier, such that the sorbent absorbs the agents, allowing the detoxifier to oxidize and decontaminate the agents for removal. More preferably, the hydrophilic nanoparticles comprise fumed silica and the detoxifier comprises hydrogen peroxide.Type: GrantFiled: December 11, 2018Date of Patent: October 11, 2022Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Jason K. Navin, Christopher J Karwacki
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Patent number: 10010072Abstract: A non-staining composition which is bactericidal, fungicidal and viricidal when applied, comprising in combination; an iodine free bactericide and/or fungicide having a residual efficacy lasting longer than 3 hours on surfaces against bacteria and fungi and a peroxide. A carrier may also be present. The bactericide and/or fungicide may be for example triclosan or a quaternary ammonium compound, or preferably a PVP-phenolic biocide complex (eg PVP-triclosan) or PVAlc/quaternary ammonium compound complex (eg PVP/benzalkonium chloride). The peroxide may be hydrogen peroxide.Type: GrantFiled: December 17, 2008Date of Patent: July 3, 2018Assignee: Novapharm Research (Australia) Pty Ltd.Inventor: Steve Kritzler
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Publication number: 20130236383Abstract: 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: ApplicationFiled: July 15, 2011Publication date: September 12, 2013Applicant: CLARIANT FINANCE (BVI) LIMITEDInventors: Peter Klug, Maurice Frederic Pilz, Ute Back
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Publication number: 20130142996Abstract: The invention relates to an agent for stabilising peroxide ions in the air. Said agent is, according to the invention, an aluminosilicate polymer such as imogolite and/or allophane. The invention can be used in particular in the field of anti-bacterial and oxidising agents.Type: ApplicationFiled: June 15, 2011Publication date: June 6, 2013Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Olivier Poncelet, Julien Jouhannaud
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Patent number: 7981391Abstract: 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: GrantFiled: August 14, 2009Date of Patent: July 19, 2011Assignee: Evonik Degussa GmbHInventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Jürgen Glenneberg, Wolfgang Wöll
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Patent number: 7722847Abstract: 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: GrantFiled: September 24, 2003Date of Patent: May 25, 2010Assignee: Evonik Degussa GmbHInventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Jürgen Glenneberg, Wolfgang Wöll
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Patent number: 7431775Abstract: 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: GrantFiled: October 27, 2006Date of Patent: October 7, 2008Assignee: Arkema Inc.Inventors: Xue Wang, Keith R. Genco, Donn Rubingh
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Patent number: 7351764Abstract: 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: GrantFiled: March 31, 2004Date of Patent: April 1, 2008Assignee: Nalco CompanyInventors: Sergey M. Shevchenko, Prasad Y. Duggirala
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Patent number: 7341636Abstract: 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: GrantFiled: January 18, 2007Date of Patent: March 11, 2008Assignee: Arkema Inc.Inventors: Xue Wang, Keith Robert Genco
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Patent number: 7169237Abstract: 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: GrantFiled: April 8, 2004Date of Patent: January 30, 2007Assignee: Arkema Inc.Inventors: Xue Wang, Keith Robert Genco
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Publication number: 20020051744Abstract: Coated metal peroxides, their preparation and use, in which metal peroxides are coated with silicone compounds from selected from the group siliconates, hydrogen-polysiloxanes, siloxanes, silicone resin emulsions, silane/siloxane emulsions, silane/siloxane mixtures, silicone microemulsion concentrates, and silicic acid ester mixtures.Type: ApplicationFiled: July 18, 2001Publication date: May 2, 2002Inventors: Werner Doetsch, Gabriele Wasem
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Patent number: 6379711Abstract: Phosphomolybdic acid and partial alkali salts of phosphomolybdic acid are used as stabilizers for aqueous hydrogen peroxide.Type: GrantFiled: January 27, 2000Date of Patent: April 30, 2002Assignee: Crompton CorporationInventors: Peter Frenkel, Ted M. Pettijohn
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Patent number: 5942202Abstract: A stabilized aqueous solution of hydrogen peroxide comprising at least one metal element selected from the group consisting of tantalum, zirconium, and niobium.The aqueous solution of hydrogen peroxide has excellent storage stability and heat stability.Type: GrantFiled: June 10, 1998Date of Patent: August 24, 1999Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Yoshio Nishimura, Yoshitsugu Minamikawa, Jun Kokubu, Chiharu Nishizawa, Satoshi Okabe, Naoko Matsuya
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Patent number: 5346722Abstract: A method for producing a thermally shock resistant washcoated substrate involves introducing a buffer solution into the microcracks, and optionally the micropores of a porous sintered body, the pH of the buffer solution being at a predetermined value to result in the formation of a gel on contact of the buffer solution with the slurry which is to be subsequently applied, contacting the body with a washcoating slurry to form a gel at the interface of the buffer solution and slurry. Formation of the gel prevents the slurry from entering the microcracks. The body is then calcined at a temperature and for a time sufficient to form the washcoated substrate.Type: GrantFiled: May 18, 1993Date of Patent: September 13, 1994Assignee: Corning IncorporatedInventors: Patricia A. Beauseigneur, Irwin M. Lachman, Mallanagouda D. Patil
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Patent number: 5130053Abstract: 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: GrantFiled: July 17, 1990Date of Patent: July 14, 1992Assignee: Interox Chemicals LimitedInventors: Neil D. Feasey, Gareth W. Morris
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Patent number: 5078672Abstract: A method for stabilizing hydrogen peroxide and the stabilized composition are claimed employing as a stabilizer a tin (II) salt of an acid selected from the group hydrofluoric acid, C6 to C17 saturated monocarboxylic acids and C2 to C6 saturated polycarboxylic acids, preferably oxalic acid. The tin content of hydrogen peroxide prepared from a tin (II) oxalate stock solution can be reduced by filtration to less than 1 mg/l if the tin oxalate stock solution has been properly aged.Type: GrantFiled: August 27, 1990Date of Patent: January 7, 1992Assignee: FMC CorporationInventors: Edward F. Dougherty, Quentin G. Hopkins, James E. Sanborn, A. Thomas Weibel
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Patent number: 4981662Abstract: 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: GrantFiled: June 1, 1990Date of Patent: January 1, 1991Assignee: FMC CorporationInventor: Edward F. Dougherty
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Patent number: 4970019Abstract: A manufacturing process and composition is claimed for a composition of matter comprising sodium carbonate, sodium carbonate perhydrate, a fluorescent whitening agent and a diphosphonic acid. The process comprises incorporating the fluorescent whitening agent and diphosphonic acid into aqueous hydrogen peroxide, uniformly applying the hydrogen peroxide solution to particulate sodium carbonate to form a reaction mixture, urging water vapor from the surface of the reaction mixture and maintaining the temperature of the reaction mixture between about 35.degree. C. and 80.degree. C.Type: GrantFiled: October 27, 1988Date of Patent: November 13, 1990Assignee: FMC CorporationInventors: John Crosby, Joseph C. Richards
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Patent number: 4963342Abstract: Aqueous mixed permonosulphuric acid/sulphuric acid solutions, such as semiconductor surface photoresist stripping solutions may be stabilised for storage by the addition of one or more of the metals gallium, germanium, indium, tin in the 4-valent form, antimony, thallium, bismuth and lead suitably in the oxide or hydrous oxide form. Mixtures of metals, for example of bismuth, tin in the 4-valent form, gallium and germanium may be particularly effective.Type: GrantFiled: June 5, 1989Date of Patent: October 16, 1990Assignee: Micro-Image Technology LimitedInventors: David J. Lapham, Nicholas A. Troughton
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Patent number: 4889689Abstract: 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: GrantFiled: October 31, 1988Date of Patent: December 26, 1989Assignee: Ciba-Geigy CorporationInventor: Fupao Tsao
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Patent number: 4885106Abstract: A storable semiconductor cleaning solution consists essentially of sulphuric acid at a concentration of from 30% to 70% and hydrogen peroxide at a concentration of from 1% to 20% preferably also containing a pentavalent phosphorus sequestrant and tin ions. The solution is produced by diluting concentrated sulphuric acid, aging the diluted acid until it reaches a temperature below 30.degree. C. and introducing the hydrogen peroxide, preferably having a concentration of at least 70% by weight, into the aged acid and equilibrating the resulting solution. The cleaning solutions can be stored for an extended period at ambient temperature and can be used to clean semiconductors, and with suitable precautions aluminized semiconductors, at temperatures below 100.degree. C.Type: GrantFiled: January 25, 1988Date of Patent: December 5, 1989Assignee: Micro-Image Technology LimitedInventors: David J. Lapham, Geoffrey Hitchmough
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Patent number: 4850729Abstract: 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: GrantFiled: April 7, 1987Date of Patent: July 25, 1989Assignee: David N. KramerInventors: David N. Kramer, Philip A. Snow
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Patent number: 4812173Abstract: Stabilized hydrogen peroxide disinfecting solutions containing diphosphonic acids (such as hydroxyethylidene diphosphonic acid), and glycerin are disclosed along with a disinfection method.Type: GrantFiled: May 1, 1987Date of Patent: March 14, 1989Assignee: Ciba-Geigy CorporationInventors: Fu-Pao Tsao, M. Alicja Sills
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Patent number: 4770808Abstract: 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: GrantFiled: August 25, 1986Date of Patent: September 13, 1988Assignee: Interox Chemicals LimitedInventors: Colin F. McDonogh, David B. Mobbs
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Patent number: 4636368Abstract: A stabilized acidic aqueous composition comprising hydrogen peroxide, metallic ions, and 3-amino-1,2,4-triazine, said triazine being present in an amount sufficient to improve the stability of said composition against decomposition of said peroxide and the methods of utilizing such composition to treat metallic surfaces and to precipitate hydrated uranium peroxide from a solution containing uranium dissolved therein.Type: GrantFiled: April 17, 1985Date of Patent: January 13, 1987Assignee: AtochemInventor: Christian Pralus
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Patent number: 4614646Abstract: An aqueous composition containing hydrogen peroxide, or a precursor which will form said peroxide in aqueous solution, is inhibited from decomposition in the presence of small amounts of copper, iron, manganese or other transition metal ions and in the presence of significant amounts of alkaline earth metal ions, e.g. Ca or Mg, by the presence of a combination of inhibitors one being from the group consisting of alkyleneaminephosphonic acids and the other being from the group consisting of polyalkylenepolycarboxylic acids and their analogous amides and sulfonic acid derivatives.Type: GrantFiled: December 24, 1984Date of Patent: September 30, 1986Assignee: The Dow Chemical CompanyInventor: Steven H. Christiansen
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Patent number: 4534945Abstract: An aqueous 25% to 35% solution of hydrogen peroxide with a residue on evaporation of 20 mg/l or less are stabilized against decomposition by a maximum of 1.4 mg/l tin. The tin is maintained in the solution in the form of a very fine colloidal sol by the addition of a maximum of 2-5 mg/kg of phosphate added as a phosphonic acid and a maximum of 5.5 mg/kg of a hydroxycarboxylic acid.Type: GrantFiled: May 3, 1984Date of Patent: August 13, 1985Assignee: FMC CorporationInventors: Quentin G. Hopkins, Jhonce N. Browning
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Patent number: 4410397Abstract: An improved peroxide based brightening and delignifying solution and process for liqnocellulosic pulp, characterized by selective delignification and pulp viscosity retention is disclosed. The process comprises maintaining a pulp slurry to a temperature between 40.degree. C. and 120.degree. C. for 0.5 hours to 8 hours. The slurry comprises lignocellulosic pulp; from 0.1% to 20% by weight based on O.D. pulp of peroxide; from 0.1% to 10% by weight based on O.D. pulp of a metal-containing additive whose metallic portion is selected from the group consisting of tin, titanium, and vanadium; and sufficient acid to maintain the .sub.f H of the slurry between about 1 and about 7. In a preferred embodiment of this invention, a tin additive is employed and the partially delignified and brightened pulp is further bleached with the unconsumed peroxide by adjusting the pH of the slurry to between 8 and 12 and maintaining the temperature of the slurry from 40.degree. C. to 90.degree. C. for 0.1 to 4 hours.Type: GrantFiled: December 24, 1980Date of Patent: October 18, 1983Assignee: International Paper CompanyInventor: Arthur W. Kempf
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Patent number: 4409197Abstract: A process for producing sodium percarbonate which comprises reacting sodium carbonate with hydrogen peroxide in a working solution of sodium carbonate, hydrogen peroxide and water, said reaction being carried out in the presence of at least one N,N,N',N'-tetra(phosphonomethyl)diaminoalkane of the following formula ##STR1## wherein R is either ##STR2## and n is 0 or 1 to 4, and at least one salt selected from the group consisting of phosphates, silicates and magnesium salts.Type: GrantFiled: October 27, 1981Date of Patent: October 11, 1983Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Junichiro Sugano, Tomoyuki Yui, Yoshitugu Minamikawa, Tsuneo Fujimoto, Minoru Kubota
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Patent number: 4362706Abstract: Stabilizer formulations have been developed for commercial hydrogen peroxide stored in stainless steel containers. These stabilizers, which include benzene phosphonous acid, 2,2'-dithiobenzoic acid, 1-allyl-thiourea, and thiocarbanilide are effective in the presence of typical decomposition catalysts when used in conjunction with typical organic phosphonic stabilizer systems, even when the commercial organic phosphonic stabilizers are present in less than the usually recommended quantities.Type: GrantFiled: November 20, 1981Date of Patent: December 7, 1982Assignee: FMC CorporationInventor: Paul E. Willard
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Patent number: 4320102Abstract: A method of stabilizing aqueous hydrogen peroxide solutions against decomposition catalyzed by a combination of iron and copper consists of adding to the solution an amount of alkali metal meta- and pyrophosphates effective to prevent decomposition and adjusting the pH of the solution to 2-4.Type: GrantFiled: October 10, 1980Date of Patent: March 16, 1982Assignee: Air Products and Chemicals, Inc.Inventors: Augustine I. Dalton, Jr., Jeffery V. Bauer
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Patent number: 4304762Abstract: Effective stabilization of aqueous hydrogen peroxide solutions is achieved by the addition of a stabilizing phosphonate compound of the general formula: ##STR1## wherein n=1-4; and X=H or a water-soluble cation. The stabilizing phosphonate compound is particularly effective for use with alkaline hydrogen peroxide solutions.Type: GrantFiled: September 24, 1979Date of Patent: December 8, 1981Assignee: Lever Brothers CompanyInventor: Arthur G. Leigh
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Patent number: 4279769Abstract: A bleaching composition comprising (A) sodium percarbonate and/or tetrasodium ethane-1,1,2,2-tetracarboxylate/hydrogen peroxide adduct, and (B) dicarboxyalkyleneimino, monocarboxyalkyleneiminobis(alkylene phosphonic acid), hydroxyethylimino diacetate and/or hydroxyethylethylenediamine triacetate compounds. The composition minimizes color change or fading of colored fabrics caused by bleaching.Type: GrantFiled: March 14, 1979Date of Patent: July 21, 1981Assignee: Kao Soap Co., Ltd.Inventors: Kouichi Yagi, Yunosuke Nakagawa
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Patent number: 4231890Abstract: A bleaching composition which does not cause color change or fading of fabrics, which composition contains 50 to 98 weight % of a peroxide which releases oxygen in an aqueous solution, 1 to 49 weight % of nitrilotriacetic acid or salt thereof and 1 to 49 weight % of a water softener as critical components.Type: GrantFiled: November 2, 1978Date of Patent: November 4, 1980Assignee: Kao Soap Co., Ltd.Inventors: Kouichi Yagi, Yunosuke Nakagawa
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Patent number: 4221675Abstract: Percompound activators comprising .alpha.-acyloxy-N-acylacetamides having the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are hydrogen or hydrocarbon radicals optionally substituted by other groups, used to activate percompounds in oxidizing and bleaching of textile fibers, oils, fats, and waxes, for cosmetic hair and skin treatment, metal surface passivation, purification, disinfection, and sterilization, the activators providing more rapid action at a given temperature and being useful at lower temperatures.Type: GrantFiled: May 23, 1978Date of Patent: September 9, 1980Assignee: Produits Chimiques Ugine KuhlmannInventors: Jean-Pierre Schirmann, Bernard Dubreux, Michel Bakes, Serge Y. Delavarenne, Marie-Christine Daude-Lagrave
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Patent number: 4171280Abstract: The invention relates to a powder bleach composition comprising a plurality of particles wherein substantially each of the particles comprises soda ash and sufficient sodium percarbonate to provide about 1 to 6 weight percent available oxygen content. The bleach composition is made by contacting particulate soda ash, either anhydrous sodium carbonate or sodium carbonate monohydrate, with sufficient of a spray of an aqueous solution of hydrogen peroxide, the contacting being at a temperature from about 35.degree. C. to about 70.degree. C. to provide the aforedescribed bleach composition. The powder bleach composition is recovered from the contacting step once sufficient reaction has occurred to provide sufficient sodium percarbonate so that the bleach composition has from about 1 to about 6 weight percent available oxygen and a remainder which comprises soda ash and minor additives.Type: GrantFiled: March 14, 1978Date of Patent: October 16, 1979Assignee: The Clorox CompanyInventors: Lodric L. Maddox, Soo-Duck P. Moon
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Patent number: 4155738Abstract: A method of stabilizing an aqueous, peroxide containing composition and the resulting stabilized composition. Preferably, EDTA and a magnesium salt are also included in the stabilized composition.Type: GrantFiled: March 30, 1978Date of Patent: May 22, 1979Assignee: Allergan Pharmaceuticals, Inc.Inventor: Malcolm P. Boghosian
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Patent number: 4151106Abstract: A process for the preparation of uniform, stable diacyl peroxide compositions is disclosed. The process comprises reacting the corresponding acyl chloride with hydrogen peroxide in an alkaline aqueous medium in the presence of a desensitizing agent.Type: GrantFiled: June 23, 1977Date of Patent: April 24, 1979Assignee: Akzona IncorporatedInventor: Guenter Meenen
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Patent number: 4140772Abstract: Aqueous hydrogen peroxide solutions used in metal dissolution processes are effectively stabilized against decomposition caused by metal ion contaminants by addition of saccharin or an alkali-metal salt of saccharin to the solutions.Type: GrantFiled: February 21, 1978Date of Patent: February 20, 1979Assignee: Dart Industries Inc.Inventor: Theodore F. Korenowski
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Patent number: 4116859Abstract: Oxygen-containing bleach products are prepared by reaction of a source of hydroperoxy groups, such as hydrogen peroxide or ozone, with a water-soluble multi-metal, inorganic, amide group-containing monomeric complex. Such complex is obtained by reacting, in the presence of aqueous ammonia, at least one non-alkaline metal with an alkali metal hydroxide in accordance with a reaction sequence which produces reactive NH.sub.2 groups.Type: GrantFiled: January 10, 1977Date of Patent: September 26, 1978Inventor: George G. Merkl
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Patent number: 4110242Abstract: The method of activating aqueous solutions of percompounds utilizing N-acylated uracils and benzouracils as activators; solid activated compositions comprising solid percompounds and N-acylated uracils and benzouracils as activators; and novel diacylated uracils and benzouracils.Type: GrantFiled: March 29, 1977Date of Patent: August 29, 1978Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Christian Hase, Brigitte Hase
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Patent number: 4097536Abstract: The present invention provides a process for producing diphthaloyl peroxide comprising the steps of reacting particulate phthalic anhydride with aqueous hydrogen peroxide in a mobile slurry or paste and thereafter separating diphthaloyl peroxide from the aqueous phase. Preferably the minimum volume of hydrogen peroxide solution is employed commensurate with obtaining a mobile slurry or paste in a mole ratio of phthalic anhydride to hydrogen peroxide of 4:3 to 1:3. Preferably the reaction is effected at a temperature of from 25.degree. to 50.degree. C.Diphthaloyl peroxide is particularly suitable for washing/bleaching fabrics, optionally in conjection with an inorganic persalt e.g. sodium perborate, at a temperature of from 30.degree. to 60.degree. C.Type: GrantFiled: April 26, 1977Date of Patent: June 27, 1978Assignee: Interox Chemicals LimitedInventors: Robert Charles Patrick Cubbon, Peter John Russell, Robert Eric Talbot, David Thomas Woodbridge
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Patent number: 4086175Abstract: A process for the activation of peroxide-based bleaches comprises conjointly incorporating into an aqueous medium a peroxide-based bleach, sufficient buffering agent to maintain the aqueous medium under alkaline conditions, cyanamide or a metal cyanamide as a peroxide activator, and magnesium, which acts in conjunction with cyanamide or metal cyanamide to further activate the peroxide-based bleach. Stable concentrated liquid or solid peroxide-based bleach compositions containing cyanamide or a metal cyanamide activator and a magnesium compound are also disclosed.Type: GrantFiled: November 22, 1976Date of Patent: April 25, 1978Assignee: Shell Oil CompanyInventors: Louis N. Kravetz, Hans E. Kubitschek
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Patent number: 4086177Abstract: A process for the activation of peroxide-based bleaches comprises conjointly incorporating into an aqueous medium a peroxide-based bleach, sufficient buffering agent to maintain the aqueous medium under alkaline conditions and certain metal cyanamides (e.g., calcium cyanamide, disodium cyanamide and sodium acid cyanamide), which have been found to be highly effective peroxide activators when employed under alkaline conditions. Stable concentrated liquid and solid metal cyanamide-activated bleaching compositions are also disclosed.Type: GrantFiled: February 9, 1976Date of Patent: April 25, 1978Assignee: Shell Oil CompanyInventors: Hans E. Kubitschek, Louis Kravetz
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Patent number: 4067751Abstract: A corrosive solution, designed to accelerate the rupture of workpieces of aluminum and its alloys in stress-corrosion-cracking tests, contains sodium chloride, hydrogen peroxide and sodium acetate dissolved in water, with maintenance of an acidic pH.Type: GrantFiled: May 11, 1976Date of Patent: January 10, 1978Assignee: Vereinigte Metallwerke Ranshofen-Berndorf AktiengesellschaftInventor: Wilhelm Pistulka
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Patent number: 4059678Abstract: Aqueous, highly acidic solutions of hydrogen peroxide (pH under 2.0) containing iron contamination at the level of 30 to 30,000 ppm, are stabilized against undesired hydrogen peroxide decomposition by the dissolution therein of amino(methyl phosphonic acid)s or their soluble salts. Additional stabilizers are desirably used when other metallic contaminants are present.Type: GrantFiled: February 2, 1973Date of Patent: November 22, 1977Assignee: FMC CorporationInventor: Donald Charles Winkley