Abstract: In a method for generating a chlorine dioxide gas, the chlorine dioxide gas is continuously generated from a gel composition obtained by adding a gelling activator containing a gas generating agent, a gas generation controlling agent containing a carbonate and hydrogen peroxide, a gas generation adjusting agent, and a water-absorbent resin to a chlorite aqueous solution. This provides a method for generating a chlorine dioxide gas, a kit for generating a chlorine dioxide gas, and a gel composition which suppress the initial rapid generation of the chlorine dioxide gas and stably hold the generation of the chlorine dioxide gas for an extremely long time.

Abstract: A stable aqueous composition of sodium chlorite and a hydrated borate donor having a pH of greater than 9.0 and the weight percent ratio of sodium chlorite (reported as NaClO2) to hydrated borate donor (reported as the sum of H2O+B2O3) is less than 1.5:1 respectfully. A method of remediating an aqueous system using the stable aqueous composition.

Abstract: Described herein are regimens for whitening the teeth, comprising administering to the teeth an effective amount of a first oral care composition comprising a bleaching agent and allowing the first oral care composition to remain on the teeth for at least 30 seconds, and brushing the teeth with a second oral care composition. Kits comprising a first oral care composition comprising a bleaching agent, wherein said first oral care composition is adapted to remain on the teeth for at least 30 seconds; a second oral care composition; and instructions for use, are also provided.

Abstract: A method for depositing carbon dioxide from a flue gas (RG) of a combustion system is provided. A scrubbing solution (A) with an amine-containing absorption agent is mixed together with ozone and/or hydrogen peroxide as an oxidizing agent for nitrite. The flue gas (RG) is brought into contact with the scrubbing solution (A) prepared in this manner, whereby carbon dioxide contained in the flue gas is absorbed, and the scrubbing solution (A) is then thermally treated, whereby the carbon dioxide is desorbed. A corresponding scrubbing solution (A) with an amine-containing absorption agent and with ozone and/or hydrogen peroxide as an oxidizing agent for nitrite is also provided.

Abstract: A composition to decommission firearms is presented. The composition comprises a monomer, a quantity of calcium chloride; and sulfur-containing compound. The sulfur containing compound includes sodium persulfate and/or sodium thiosulfate.

Abstract: According to this invention there is provided an aqueous oxidizer solution containing a mixture of dissolved oxidizing salts, for use in the preparation of explosives formulations, which a crystallization point as low as below 0° C. The solution has a water content of 25% by mass or less and contains ammonium nitrate and calcium nitrate wherein the ratio of the molar concentration of ammonium nitrate to calcium nitrate is preferably approximately 1. When the water content of the solution is 24% by mass or less, the solution further contains monomethylammonium nitrate. This solution can be used for manufacturing watergel explosives, or emulsion explosives or ANE's (ammonium nitrate emulsion suspension or gel explosives). It can be easily transported underground in deep level mines through relatively small diameter pipelines, using existing access ways and shafts, to the working places at which point it can then be converted into a watergel or emulsion explosive or an ANE.

Abstract: A sodium hypochlorite composition comprising between about 25% and about 40% sodium hypochlorite, in the form of a slurry of sodium hypochlorite pentahydrate crystals in a mother liquor saturated in sodium hypochlorite. The composition can include sodium chloride, and an alkai stabilizer such as sodium hydroxide and sodium carbonate. The slurry is preferably between about ?15° C. and about 10° C. A method of transporting or storing sodium hypochlorite is also provided in which the sodium hypochlorite is in the form of a slurry of sodium hypochlorite pentahydrate crystals in a mother liquor saturated in sodium hypochlorite. The composition can include sodium chloride, and an alkali stabilizer such as sodium hydroxide and sodium carbonate. The slurry is preferably between about ?15° C. and about 10° C.

Abstract: The present invention provides systems and methods for in-situ remediation of soil and groundwater having contaminants such as but not limited to organic compounds perhaps providing adsorption, chemical oxidation, and even biodegradation of contaminants with novel treatments such as but not limited to mixtures of granular activated carbon, calcium peroxide, sodium persulfate, and nitrate perhaps in various concentrations.

Abstract: A stabilized mixed oxidant solution may be produced by flowing a starting solution (e.g., salt brine, hypochlorous acid, and/or sodium hypochlorite) through a flow-through electrochemical module including first and second passages separated by an ion permeable membrane while electric power is applied between an anode and cathode in electrical communication with the first and second passages, respectively. An initially acidic anolyte solution received from the first (anode) passage is stabilized by elevating pH to yield a stabilized mixed oxidant solution. Methods of using the mixed oxidant solution are further provided.

Abstract: A method of degrading halogenated organic compounds, to use of the method for decontaminating PFOS (perfluorooctanesulfonic acid) and PFOA (perfluorooctanoic acid) contaminated medium, and a composition such as that which is suitable to be applied in said method.

Abstract: The present invention provides systems and methods for in-situ remediation of soil and groundwater having contaminants such as but not limited to organic compounds perhaps providing adsorption, chemical oxidation, and even biodegradation of contaminants with novel treatments such as but not limited to mixtures of granular activated carbon, calcium peroxide, sodium persulfate, and nitrate perhaps in various concentrations.

Abstract: A bleaching composition comprising a peroxy compound and one or more activator present in an effective amount to activate the peroxy compound, present in an amount effective to accomplish bleaching or cleaning or oxidation. The activator is a metallocarbene of the general structure (XX?C)yMLn? where M represents a metal center, C represents the carbene carbon bound to the metal center, X and X? may be the same or different and may furthermore be part of a cyclic structure, Ln? represents one or more other ligands which may or may not include one or more metal centers, and where y>1.

Abstract: A combined chlorine agent having a low concentration of free chlorine and a high concentration of combined chlorine whereby combined chlorine concentration of water can be heightened when added to water systems at a low concentration of free chlorine, methods of efficient production and chlorine treatment at low free chlorine concentration are provided. The combined chlorine agent consists of an aqueous agent which comprises alkali consisting of alkali metal hydroxide, sulfamic acid, and oxidizing agent based on chlorine, wherein the composition ratio of the oxidizing agent based on chlorine to the sulfamic acid is in the range from 0.45 to 0.6 by Cl/N (mole ratio), the composition ratio of the oxidizing agent based on chlorine to alkali is in the range from 0.3 to 0.4 by Cl/alkali metal (mole ratio), and free chlorine concentration in the aqueous agent is 2% by weight or lower of total chlorine concentration.

Abstract: A massive body, e.g., a tablet, for producing a thickened solution of chlorine dioxide when the massive body is added to liquid water is disclosed. The massive body comprises a metal chlorite, an acid source and a thickener (incorporated directly into the massive body or added as a component separate from the massive body) and optionally a source of free halogen. The concentration of free chlorine in the solution will be: (a) less than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.25:1 by weight; or (b) equal to or greater than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.50:1 by weight.

Abstract: A composition to decommission firearms is presented. The composition comprises a monomer, a quantity of calcium chloride; and sulfur-containing compound. The sulfur containing compound includes sodium persulfate and/or sodium thiosulfate.

Abstract: A fining agent for reducing the concentration of seeds or bubbles in a silicate glass. The fining agent includes at least one inorganic compound, such as a hydrate or a hydroxide that acts as a source of water. In one embodiment, the fining agent further includes at least one multivalent metal oxide and, optionally, an oxidizer. A fusion formable and ion exchangeable silicate glass having a seed concentration of less than about 1 seed/cm3 is also provided. Methods of reducing the seed concentration of a silicate glass, and a method of making a silicate glass having a seed concentration of less than about 1 seed/cm3 are also described.

Abstract: The present invention relates to novel sulfoperoxycarboxylic acid compounds, and methods for making and using them. The sulfoperoxycarboxylic compounds of the invention are storage stable, water soluble and have low to no odor. Further, the compounds of the present invention can be formed from non-petroleum based renewable materials. The compounds of the present invention can be used as antimicrobials, and bleaching agents. The compounds of the present invention are also suitable for use as coupling agents.

Abstract: A method of reducing styrene emissions in aqueous cured-in-place pipe closed molding processes and other aqueous environments using a styrene reduction agent. The reduction agent generally comprises a calibrated mixture of salts including sodium chloride plus three persulfate salts: ammonium (APS), potassium (KPS), and sodium (NPS). These ingredients are combined in powder form and are compressed into soluble capsules containing calibrated amounts of the mixture. The capsule(s) may be prescribed through the use of software. Capsule(s) are added to the cure water prior to starting the boiler equipment for the Cured-In-Place Pipe process in order to reduce the residual monomer content in either process or waste streams.

Abstract: A cleaning, disinfection, and indicator agent comprising a water-soluble permanganate, particularly for mixture with an agent for ensuring an alkaline milieu having a pH value of at least 11, which, in addition to the water-soluble permanganate, contains a further oxidizing agent, whose oxidation potential is above that of manganese VII to manganese VI, pH buffer substances, preferably primary and/or secondary alkali carbonates such as sodium carbonate and/or sodium hydrogen carbonate, as well as oxidation-resistant polyphosphates. Furthermore, methods for cleaning, disinfecting, and monitoring the cleanliness of commercial and industrial plants or plant components and the use of an agent according to the present invention as an indicator solution for ascertaining the cleanliness of commercial and industrial plants or plant components by ascertaining the intensity of the light emitted in the violet wavelength range by the solution are described.

Abstract: A solid composition in the form of a tablet that generates and releases a biocidal solution comprising at least chlorine dioxide with an enhanced weight percent yield is presented. The composition comprises reactants capable of in-situ generation of chlorine dioxide comprising a chlorite donor that is coated with a gel-forming material that slows the rate of dissolution of the high solubility chlorite donor, a free halogen donor, and an acid source, resulting in an unexpectedly high weight percent yield and providing a controlled release of biocidal solution. The compositions of the invention show improved environmental stability which can reduce the cost of packaging and significantly increase the utility of the composition. The controlled release allows the use in multi-tablet chemical dispensers which may otherwise induce potentially explosive conditions or allow rapid release of the biocidal solution thereby inducing a spike in chemical concentration rather than a controlled and sustained release.

Abstract: A solid composition in the form of a tablet that generates and releases a biocidal solution comprising at least chlorine dioxide with an enhanced weight percent yield is presented. The composition comprises reactants capable of in-situ generation of chlorine dioxide comprising a chlorite donor that is coated with a gel-forming material that slows the rate of dissolution of the high solubility chlorite donor, a free halogen donor, and an acid source, resulting in an unexpectedly high weight percent yield and providing a controlled release of biocidal solution. The compositions of the invention show improved environmental stability which can reduce the cost of packaging and significantly increase the utility of the composition. The controlled release allows the use in multi-tablet chemical dispensers which may otherwise induce potentially explosive conditions or allow rapid release of the biocidal solution thereby inducing a spike in chemical concentration rather than a controlled and sustained release.

Abstract: A styrene reduction agent that effectively and economically reduces styrene emissions in Cured-In-Place Pipe, closed molding processes. The reduction agent generally comprises a calibrated mixture of salts including sodium chloride plus three persulfate salts: ammonium (APS), potassium (KPS), and sodium (NPS). These ingredients are combined in powder form and are compressed into soluble capsules containing calibrated amounts of the mixture. The capsule(s) may be prescribed through the use of software. Capsule(s) are added to the cure water prior to starting the boiler equipment for the Cured-In-Place Pipe process in order to reduce the residual monomer content in either process or waste streams.

Abstract: A combination of a styrene reduction agent and a catalyst that effectively and economically reduces styrene emissions in Cured-In-Place Pipe, closed molding processes. The reduction agent generally comprises a calibrated mixture of salts including sodium chloride plus three persulfate salts: ammonium (APS), potassium (KPS), and sodium (NPS). These ingredients are combined in powder form and are compressed into soluble capsules containing calibrated amounts of the mixture. The capsule(s) may be prescribed through the use of software. The catalyst is hydrogen peroxide (H2O2). A calibrated amount of the styrene reduction agent capsule(s) are added to the cure water prior to starting the boiler equipment for the Cured-In-Place Pipe process, and this is followed by a calibrated amount of the H2O2 catalyst in order to reduce the residual monomer content in either process or waste streams.

Abstract: Compositions and methods for their use are presented that substantially increase the rate of inactivation of microbiological organisms, especially those resistant to inactivation from free halogen based sanitizers, and oxidation of oxidation resistant organic based compounds in aqueous solution. Aquatic facilities susceptible to accumulation of organic N-chloramines, cyanuric acid and other oxidation resistant compounds, as well as oxidation resistant parasitic organisms such as cryptosporidium and Giardia, obtain dramatic improvements in the rate of oxidation and subsequent inactivation of these undesirable contaminants.

Abstract: The present invention generally relates to an improved two-part oxidizing system, as well as oxidizing compositions and methods for making and using the same, and in a particular embodiment to a two-part oxidizing system that, when mixed, yields an oxidizing composition. The two-part oxidizing system includes a metal chlorite first part, and an acid second part where the acid is sodium acid sulfate or a derivative thereof.

Abstract: A composition comprising a cationically-polymerizable compound, an iodonium-based cationic initiator, a sensitizer for said cationic initiator and an antioxidant selected from the group consisting of phenol antioxidants, lactone antioxidants, and combinations of these antioxidants is provided. The addition of this antioxidant to this composition contributes to the reduction of potential run-away reaction when it is exposed in-bulk to actinic radiation.

Abstract: A method and composition for reducing chemical oxygen demand is presented. The composition includes a persulfate donor and a transition metal catalyst in contact with the persulfate donor. When the composition is contacted by water, the transition metal catalyst reacts with persulfate and reduces the persulfate concentration in the water. The composition allows the use of persulfate, which is known to cause irritation to users of aquatic facilities (e.g., pools, spas) that come in contact with it. As the persulfate concentration is reduced rapidly in the water by the catalyzed reaction, the persulfate-containing cleaning product may even be used while the aquatic facilities are being used. Optionally, a free halogen donor may be incorporated into the composition. The composition may be in the form of powder, granules (coated or uncoated), or agglomerate.

Abstract: A non-cytotoxic chlorine dioxide composition and a mixed agent bleaching composition for tooth whitening are disclosed. Methods of use are also provided.

Abstract: A non-cytotoxic chlorine dioxide composition and a mixed agent bleaching composition for tooth whitening are disclosed. Methods of use are also provided.

Abstract: A non-cytotoxic chlorine dioxide composition and a mixed agent bleaching composition for tooth whitening are disclosed. Methods of use are also provided.

Abstract: A method and composition for reducing chemical oxygen demand is presented. The composition includes a persulfate donor, a transition metal catalyst in contact with the persulfate donor, and a cationic electrolyte. When the composition is contacted by water, the transition metal catalyst reacts with persulfate and reduces the persulfate concentration in the water. The composition allows the use of persulfate, which is known to cause irritation to users of aquatic facilities (e.g., pools, spas) that come in contact with it. As the persulfate concentration is reduced rapidly in the water by the catalyzed reaction, the persulfate-containing product may be applied while the aquatic facilities are being used. A free halogen donor may be incorporated into the composition. The composition may be in the form of powder, granules (coated or uncoated), or agglomerate. The cationic electrolyte facilitates the removal of the catalyst from the water.

Abstract: A method and composition for reducing chemical oxygen demand is presented. The composition includes a persulfate donor and a transition metal catalyst in contact with the persulfate donor. When the composition is contacted by water, the transition metal catalyst reacts with persulfate and reduces the persulfate concentration in the water. The composition allows the use of persulfate, which is known to cause irritation to users of aquatic facilities (e.g., pools, spas) that come in contact with it. As the persulfate concentration is reduced rapidly in the water by the catalyzed reaction, the persulfate-containing cleaning product may even be used while the aquatic facilities are being used. Optionally, a free halogen donor may be incorporated into the composition. The composition may be in the form of powder, granules (coated or uncoated), or agglomerate.

Abstract: A method of treating a peroxygen compound (e.g., potassium monopersulfate) for use in applications where controlled release rate, exposure to incompatible compounds, and/or moisture is presented. The method incorporates coating the peroxygen compound with one or more of the following polymers: 1) chitin/chitosan, 2) carboxylate/sulfonate copolymer or tertiary polymer, and 3) carboxylate polymer selected from polymaleic acid, polyepoxysuccinic acid and/or phosphinocarboxylate polymers. Optionally, the peroxygen compound is also coated with an inorganic salt layer and a silicate layer. Potassium monopersulfate coated with an organic polymer is useful in reduced allergenic formulations and as an anti-caking agent. When the organic polymer is a polysaccharide, the coated potassium monopersulfate is also effective for shock treatment of water systems (e.g., pools). The oxidizing composition prepared with this method has a prolonged shelf life while demonstrating good solubility during use.

Abstract: A method and composition for reducing chemical oxygen demand is presented. The composition includes a persulfate donor and a transition metal catalyst in contact with the persulfate donor. When the composition is contacted by water, the transition metal catalyst reacts with persulfate and reduces the persulfate concentration in the water. The composition allows the use of persulfate, which is known to cause irritation to users of aquatic facilities (e.g., pools, spas) that come in contact with it. As the persulfate concentration is reduced rapidly in the water by the catalyzed reaction, the persulfate-containing cleaning product may even be used while the aquatic facilities are being used. Optionally, a free halogen donor may be incorporated into the composition. The composition may be in the form of powder, granules (coated or uncoated), or agglomerate.

Abstract: A composition capable of expedited in-situ generation of dioxirane and a method of preparing the composition are presented. The composition includes a transition metal catalyst, peracid donor, and carbonyl donor, and forms an effective multi-purpose oxidizing (e.g., bleaching) solution. Methods of using the bleaching solutions and their application are also presented. The composition provides a cost-effective means of producing a dioxirane-based multi-purpose bleaching solution for use on laundries, carpets, hard surfaces, bathroom surfaces, floors and the like.

Abstract: A reactor for an in-situ production of a chemical product in high yield are presented. The reactor, which may be placed in a main solvent, includes a core and a reactor wall around the core. The reactor wall allows controlled permeation of the main solvent to the core. The core contains a reactant that reacts to produce a target product upon being contacted by a main solvent. The target product leaves the reactor at a controlled rate. Because the amount of the main solvent that permeates into the reactor is controlled, a high concentration of the reactant is maintained inside the reactor, resulting in a higher yield of the desired chemical product than if the reactants were directly added to the body of main solvent.

Abstract: A microporous diffuser includes a first elongated member including at least one sidewall having a plurality of microscopic openings. The sidewall defines an interior hollow portion of the member. The diffuser has a second elongated member having a second sidewall having a plurality of microscopic openings, the second member being disposed through the hollow region of the first member. The diffuser includes an end cap to seal a first end of the microporous diffuser and an inlet cap disposed at a second end of microporous diffuser for receiving inlet fittings.

Abstract: Transition metal ions have the ability to increase the oxidation performance of the inorganic peroxy salts at room temperature by possibly lowering their activation energy or by producing more reactive free radicals. When two transition metal salts are used together to decompose dipersulfate, it provides synergistic oxidation activity, better than obtained by dipersulfate or dipersulfate with either copper or zinc alone. The transition metals mentioned are the water soluble salts of copper and zinc. Oxidation performance of sodium dipersulface in presence of catalytic amount of copper and zinc salts was determined by measuring the destruction of crystal violet dye at a wavelength of 589 nm.

Abstract: Compositions, methods and kits for purifying and clarifying and/or nutrifying contaminated drinking water and which comprise a primary coagulant material, a microbiocidal disinfectant and an oxidant system. Highly preferred compositions also contain one or more of a bridging flocculent material, the levels and ratios of coagulant to flocculent preferably falling within certain ranges, a cationic coagulant aid, especially chitosan, a water-soluble alkali, a water-insoluble silicate, and a food additive or nutrient source. The purified water remains free of discoloration for extended periods of storage.

Abstract: A massive body, e.g., a tablet, for producing a solution of chlorine dioxide when the massive body is added to liquid water. The massive body comprises a metal chlorite such as sodium chlorite, an acid source such as sodium bisulfate and a source of free halogen such as the sodium salt of dichloroisocyanuric acid or a hydrate thereof. The concentration of free halogen in the solution will be: (a) less than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.25:1 by weight; or (b) equal to or greater than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.50:1 by weight.

Abstract: Sodium hypochlorite disinfectant solution having a pH of between 10.1 and 10.7 and comprising from 0.021 to 5.76% (w/v) of sodium hypochlorite and, relative to the said amount of sodium hypochlorite, not more than 2% of sodium chlorate.

Abstract: A compression molded product of quick-dissolving chlorinated isocyanuric acid, comprising: (a) trichloroisocyanuric acid, (b) sodium dichloroisocyanurate anhydrous salt, (c) magnesium sulfate and/or aluminum sulfate, and (d) calcium carbonate.

Abstract: The oxygen generating compositions are formed from a metal powder as a fuel, strontium peroxide as a chlorine suppressant, a catalyst, a reaction rate modifier, and an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. The oxygen generating compositions can optionally also further comprise a transition metal oxide catalyst, and can optionally further include a binder as a pressing aid for forming an oxygen generating oxygen generating block or core. The oxygen generating compositions can be formed from zero to about 15% by weight of metal powder as a fuel, about 0.1%-20% by weight strontium peroxide, from zero to about 15% by weight of a transition metal oxide catalyst, from zero to about 5% of an optional binder, and the remainder of an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof.

Abstract: Calcium nitrate, which is known to have the effect of inhibiting elution of phosphorus contained as insoluble substance in sludge in rivers, lakes and coasts in a reducing environment, can be applied not by injection of an aqueous solution of calcium nitrate, but by putting it in a solid form. An agent for inhibiting elution of phosphorus is proposed which comprises calcium nitrate as the major component (10-30%), calcium carbonate or calcium sulfate (a total of 50-90%), and stearic acid or its salt (1-20%) as a hydrophobic substance for delaying elution of the calcium salt, and sucrose fatty acid isobutyl or paraoxy isobutyl benzoate (1-20%) as a binder, and the composition is pressed in a mold into tablets or briquette. The application into sludge by use of an air gun is preferable.

Abstract: The invention pertains to coral sand, more particularly to a composition of coral algae, shell sand and ascorbate being useful as an additive for the improvement of the quality, including the taste, of drinking water, that is as a water improvement agent. The composition is as follows: 5 to 90% coral algae, 5 to 90% shell sand, 0.1 to 8% ascorbic acid salt, and it is chosen so that by the addition of 0.5 g to 1 liter of water is the mixture is emerging with a pH from 7 to 8.5. If the product in addition contains a suitable gelling agent, this entails that any bacteria formerly present, after addition of the water improvement agent according to the invention, no longer exist in the free solution.

Abstract: A compression molded product of quick-dissolving chlorinated isocyanuric acid, comprising:

Abstract: A massive body, e.g., a tablet, for producing a solution of chlorine dioxide when the massive body is added to liquid water. The massive body comprises a metal chlorite such as sodium chlorite, an acid source such as sodium bisulfate and a source of free halogen such as the sodium salt of dichloroisocyanuric acid or a hydrate thereof. The concentration of free halogen in the solution will be: (a) less than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.25:1 by weight; or (b) equal to or greater than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.50:1 by weight.

Abstract: A method of forming bricks, tiles, and the like by treating clay, shale or other clay ceramic raw materials containing pyrite is disclosed. Such clay ceramic raw materials may be ground, and then mixed with an oxidizer in a pre-oxidation step to disperse the oxidizer within the clay to expose the maximum amount of clay surface to the oxidizer. One oxidizer that may be used is an aqueous solution of hydrogen peroxide. Clay is shaped into clay products and then heated to elevated temperatures. Pyrite within the clay is oxidized, thereby removing sulfur-containing compounds such as sulfur dioxide from the clay. The application of the invention may assist in preventing efflorescense by ensuring complete or nearly complete removal of pyrite from products oxidation treatment and subsequent firing at elevated temperatures. Similarly, by enhancing the oxidation of pyrite, faster firing cycles may be possible which facilitates reduced fuel consumption and faster process time.

Abstract: The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula MxOyn−, where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BMxOyn−, where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMo12O40)3−, (PMo10V2O40)5−, (MnPW11O39)5−, (PW12O40)3−, (SiMo12O40)4−, (SiW12O40)4−, (Mo7O24)6−, (CeMo7O24)8−and mixtures thereof.

Abstract: A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0.0166% and about 1.66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25° C. to 100° C. for a period of time ranging from about 1 second to about 5 minutes.