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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Abstract: The invention relates to an aqueous solution consisting essentially of:

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.

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.

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.

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.

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.

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.

Abstract: Phosphomolybdic acid and partial alkali salts of phosphomolybdic acid are used as stabilizers for aqueous hydrogen peroxide.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Abstract: A crystallized, stable histidine-hydrogen peroxide adduct intermolecular-bonded at 1:1 ratio is provided.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Abstract: Stabilized hydrogen peroxide disinfecting solutions containing diphosphonic acids (such as hydroxyethylidene diphosphonic acid), and glycerin are disclosed along with a disinfection method.

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.

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.