Calcium Patents (Class 252/187.28)
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Patent number: 10294103Abstract: A process for preparing an aqueous solution comprising hypochlorous acid, the process comprising: (i) treating an aqueous starting solution comprising hypochlorite and a precipitable counter-ion with a precipitation agent to form a counter-ion precipitate and a supernatant liquid having a pH greater than 6; (ii) removing at least part of said precipitate; and subsequently (iii) acidifying at least part of the supernatant liquid with a strong inorganic acid other than hydrochloric acid, to a pH in the range of from 3.0 to 6.0, to form an aqueous product solution comprising hypochlorous acid. Solutions obtainable by the process are also described, as are related uses.Type: GrantFiled: November 9, 2015Date of Patent: May 21, 2019Assignee: XANADOX TECHNOLOGIES LIMITEDInventor: Richard Maxwell Barrett
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Publication number: 20150097141Abstract: The invention relates to compositions, methods of use, and methods of manufacture for an intercalated bleach compound and compositions thereof. The intercalated bleach compound has the formula Mx(OCl)y(O)m(OH)n where M is an alkaline earth metal such as magnesium, calcium or mixture thereof. The values of x and y independently equal any number greater than or equal to 1 (e.g., 1, 2, 3, 4, etc.), and m and n independently equal any number greater than or equal to 0 (e.g., 0, 1, 2, 3, 4, etc.), but m and n are not both 0. In addition, the molar ratio of the alkaline earth metal (e.g., magnesium or calcium) to hypochlorite is at least 3:1. In other words, x is ?3y. The compounds exhibit excellent stability, little or no chlorine bleach odor, exhibit excellent pH buffering characteristics, and less reactivity with organic materials as compared to alternative chlorine bleach products.Type: ApplicationFiled: October 9, 2013Publication date: April 9, 2015Applicant: The Clorox CompanyInventors: EVAN RUMBERGER, Marisa Macnaughtan, William L. Smith, Kelsey Kornaus
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Publication number: 20150097140Abstract: The invention relates to compositions, methods of use, and methods of manufacture for an intercalated bleach compound and compositions thereof. The intercalated bleach compound has the formula Mx(OCl)y(O)m(OH)n where M is an alkaline earth metal such as magnesium, calcium or mixture thereof. The values of x and y independently equal any number greater than or equal to 1 (e.g., 1, 2, 3, 4, etc.), and m and n independently equal any number greater than or equal to 0 (e.g., 0, 1, 2, 3, 4, etc.), but m and n are not both 0. In addition, the molar ratio of the alkaline earth metal (e.g., magnesium or calcium) to hypochlorite is at least 3:1. In other words, x is ?3y. The compounds exhibit excellent stability, little or no chlorine bleach odor, exhibit excellent pH buffering characteristics, and less reactivity with organic materials as compared to alternative chlorine bleach products.Type: ApplicationFiled: October 9, 2013Publication date: April 9, 2015Applicant: The Clorox CompanyInventors: Evan Rumberger, Marisa MacNaughtan, William L. Smith, Kelsey Kornaus
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Patent number: 8603392Abstract: Corrosion-inhibited hypochlorite compositions and methods of use are disclosed. Corrosion inhibitors including sugar acids and calcium compounds, polyacrylate and calcium compounds, and/or zinc and calcium compounds are used with hypochlorite sources to enhance the longevity and performance of electrochemical cells as well as reducing corrosion of metal in contact with the generated hypochlorite sources. The methods for generation employ a variety of electrochemical cells, beneficially including use of portable electrochemical cell system for production of corrosion-inhibited hypochlorite cleaning solutions.Type: GrantFiled: June 25, 2012Date of Patent: December 10, 2013Assignee: Ecolab USA Inc.Inventors: Jenna Johnson, Kim R. Smith, Erik C. Olson, Steven E. Lentsch
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Patent number: 8557178Abstract: Corrosion inhibitor compositions and methods of use are disclosed. Corrosion inhibitors are selected from polyacrylate and calcium corrosion inhibitors, zinc and calcium corrosion inhibitors and/or sugar acids and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.Type: GrantFiled: July 13, 2012Date of Patent: October 15, 2013Assignee: Ecolab USA Inc.Inventors: Erik C. Olson, Kim R. Smith, Steven E. Lentsch, Sherri L. Tischler
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Patent number: 8496853Abstract: Corrosion inhibitor compositions and methods of use are disclosed. Zinc and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.Type: GrantFiled: June 12, 2012Date of Patent: July 30, 2013Assignee: Ecolab USA Inc.Inventors: Erik C. Olson, Kim R. Smith, Steven E. Lentsch
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Patent number: 8486879Abstract: A solid composition including calcium and/or magnesium hypochlorite, a builder (e.g., one or more of carbonate, bicarbonate, sesquicarbonate), an acid, a water-soluble polymer, at least one anionic surfactant, and optionally, a hydrotrope. The composition does not include any potassium hypochlorite, sodium hypochlorite, lithium hypochlorite, N-halogenated compounds, peroxides, persulfates, hydantoins, isocyanurates, or carboxylic acids that also have hydroxyl, amino, amido, imino, or imido groups. Upon dissolution of the composition in water, the calcium and/or magnesium hypochlorite and acid react to form hypochlorous acid. The use of hypochlorous acid, rather than direct use of an alkaline or alkaline earth hypochlorite results in a composition that is typically acidic rather than basic, and that results in improved cleaning. The composition is particularly suited for cleaning and disinfecting dentures.Type: GrantFiled: December 19, 2012Date of Patent: July 16, 2013Assignee: The Clorox CompanyInventors: Evan Rumberger, William L. Smith
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Patent number: 8481471Abstract: The present invention provides a solid-layered composition having at least two parts. The first part comprises a) calcium hypochlorite, magnesium hypochlorite and mixtures thereof, b) a builder, c) a water-soluble polymer, d) an acid, and e) wherein the first part does not contain sodium hypochlorite, lithium hypochlorite, potassium hypochlorite and mixtures thereof. The second part comprises a) a functional ingredient, b) a builder or filler, and c) wherein the second part does not contain any oxidant.Type: GrantFiled: December 19, 2012Date of Patent: July 9, 2013Assignee: The Clorox CompanyInventors: William L. Smith, Evan M. Rumberger
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Patent number: 8475678Abstract: The present invention provides a method of using a solid-layered composition having at least two parts. The first past comprises a) calcium hypochlorite, magnesium hypochlorite and mixtures thereof, b) a builder, c) a water-soluble polymer, d) an acid, and e) wherein the first part does not contain sodium hypochlorite, lithium hypochlorite, potassium hypochlorite and mixtures thereof. The second part comprises a) a surfactant, b) a builder, c) an acid, and d) wherein the second part does not contain any oxidant.Type: GrantFiled: September 11, 2012Date of Patent: July 2, 2013Assignee: The Clorox CompanyInventors: William L. Smith, Evan M. Rumberger
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Patent number: 8372291Abstract: The present invention is directed to a water treatment composition, comprising: 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. The present invention is also directed to a water treatment tablet, comprising 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. Methods of treating recreational water using the compositions are also disclosed.Type: GrantFiled: March 31, 2011Date of Patent: February 12, 2013Assignee: Arch Chemicals, Inc.Inventors: Richard M. Mullins, Michael J. Unhoch
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Patent number: 8361943Abstract: A solid composition including calcium and/or magnesium hypochlorite, a builder (e.g., one or more of carbonate, bicarbonate, sesquicarbonate), an acid, a water-soluble polymer, at least one anionic surfactant, and optionally, a hydrotrope. The composition does not include any potassium hypochlorite, sodium hypochlorite, lithium hypochlorite, N-halogenated compounds, peroxides, persulfates, hydantoins, isocyanurates, or carboxylic acids that also have hydroxyl, amino, amido, imino, or imido groups. Upon dissolution of the composition in water, the calcium and/or magnesium hypochlorite and acid react to form hypochlorous acid. The use of hypochlorous acid, rather than direct use of an alkaline or alkaline earth hypochlorite results in a composition that is typically acidic rather than basic, and that results in improved cleaning. The composition is particularly suited for cleaning and disinfecting dentures.Type: GrantFiled: October 14, 2010Date of Patent: January 29, 2013Assignee: The Clorox CompanyInventors: William L. Smith, Evan M. Rumberger
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Patent number: 8361944Abstract: The present invention provides a solid-layered composition having at least two parts. The first part comprises a) calcium hypochlorite, magnesium hypochlorite and mixtures thereof, b) a builder, c) a water-soluble polymer, d) an acid, and e) wherein the first part does not contain sodium hypochlorite, lithium hypochlorite, potassium hypochlorite and mixtures thereof. The second part comprises a) a functional ingredient, b) a builder or filler, and c) wherein the second part does not contain any oxidant.Type: GrantFiled: November 10, 2010Date of Patent: January 29, 2013Assignee: The Clorox CompanyInventors: William L. Smith, Evan Rumberger
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Patent number: 8361942Abstract: A solid composition including calcium and/or magnesium hypochlorite, a builder (e.g., one or more of carbonate, bicarbonate, sesquicarbonate), an acid, a water-soluble polymer, at least one anionic surfactant, and optionally, a hydrotrope. The composition does not include any potassium hypochlorite, sodium hypochlorite, lithium hypochlorite, N-halogenated compounds, peroxides, persulfates, hydantoins, isocyanurates, or carboxylic acids that also have hydroxyl, amino, amido, imino, or imido groups. Upon dissolution of the composition in water, the calcium and/or magnesium hypochlorite and acid react to form hypochlorous acid. The use of hypochlorous acid, rather than direct use of an alkaline or alkaline earth hypochlorite results in a composition that is typically acidic rather than basic, and that results in improved cleaning. The composition is particularly suited for cleaning and disinfecting dentures.Type: GrantFiled: October 13, 2010Date of Patent: January 29, 2013Assignee: The Clorox CompanyInventors: William L. Smith, Evan Rumberger
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Patent number: 8361945Abstract: The present invention provides a method for cleaning dentures by contacting the dentures with a solid, multi-layered composition having at least two parts in water. The first part of the composition comprises a) calcium hypochlorite, magnesium hypochlorite and mixtures thereof, b) a builder, c) a water-soluble polymer, d) an acid, and e) wherein the first part does not contain sodium hypochlorite, lithium hypochlorite, potassium hypochlorite and mixtures thereof. The second part comprises a) a functional ingredient, b) a builder or filler, and c) wherein the second part does not contain any oxidant.Type: GrantFiled: November 10, 2010Date of Patent: January 29, 2013Assignee: The Clorox CompanyInventors: William L. Smith, Evan Rumberger
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Patent number: 8343380Abstract: Corrosion inhibitor compositions and methods of use are disclosed. Sugar acids and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.Type: GrantFiled: November 9, 2011Date of Patent: January 1, 2013Assignee: Ecolab USA Inc.Inventors: Kim R. Smith, Erik C. Olson, Steven E. Lentsch
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Patent number: 8309508Abstract: A cleaning substrate which comprises at least one layer of a solid hypohalite precipitate, wherein the hypohalite precipitate is formed in situ on the layer of substrate material. A process for making a fibrous cleaning substrate comprising the steps of: a) providing at least one layer of fibrous material; b) exposing the fibrous layer to an aqueous alkaline earth salt solution; c) treating the fibrous layer with a hypochlorite solution; d) allowing the aqueous alkaline earth salt solution combine with the hypochlorite solution to form a solid hypochlorite precipitate around the fibers in the fibrous material and a liquid phase, and e) removing at least 65% of the liquid phase from the fibrous substrate.Type: GrantFiled: December 3, 2010Date of Patent: November 13, 2012Assignee: The Clorox CompanyInventors: Marc P. Privitera, William L. Smith, Edward Jason White, Leslie N. Adams
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Patent number: 8287755Abstract: The present invention provides a solid-layered composition having at least two parts. The first part comprises a) calcium hypochlorite, magnesium hypochlorite and mixtures thereof, b) a builder, c) a water-soluble polymer, d) an acid, and e) wherein the first part does not contain sodium hypochlorite, lithium hypochlorite, potassium hypochlorite and mixtures thereof. The second part comprises a) a surfactant, b) a builder, c) an acid, and d) wherein the second part does not contain any oxidant.Type: GrantFiled: November 18, 2009Date of Patent: October 16, 2012Assignee: The Clorox CompanyInventors: William L. Smith, Evan M. Rumberger
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Patent number: 8268770Abstract: A cleaning substrate which comprises at least one layer of a solid hypohalite precipitate, wherein the hypohalite precipitate is formed in situ on the layer of substrate material. A process for making a fibrous cleaning substrate comprising the steps of: a) providing at least one layer of fibrous material; b) exposing the fibrous layer to an aqueous alkaline earth salt solution; c) treating the fibrous layer with a hypochlorite solution; d) allowing the aqueous alkaline earth salt solution combine with the hypochlorite solution to form a solid hypochlorite precipitate around the fibers in the fibrous material and a liquid phase, and e) removing at least 65% of the liquid phase from the fibrous substrate.Type: GrantFiled: January 28, 2011Date of Patent: September 18, 2012Assignee: The Clorox CompanyInventors: Marc P. Privitera, William L. Smith, Edward Jason White, Leslie N. Adams
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Patent number: 8252200Abstract: The present invention is directed to a water treatment composition, comprising: calcium hypochlorite coated with a coating comprising at least one hydrated or anhydrous salt. The present invention is also directed to a water treatment composition, comprising: (a) an inner core layer comprising calcium hypochlorite; (b) one or more interlayers of selected salts positioned on top of said inner core layer, and (c) one or more outer layers of selected salts positioned on top of said interlayer(s).Type: GrantFiled: November 21, 2006Date of Patent: August 28, 2012Assignee: Arch Chemicals, Inc.Inventors: Deqing Lei, George Polson, Sonia Oberson, Ellen M. Meyer, James D. Kilby
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Patent number: 8114344Abstract: Corrosion inhibitor compositions and methods of use are disclosed. Sugar acids and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.Type: GrantFiled: December 21, 2010Date of Patent: February 14, 2012Assignee: Ecolab USA Inc.Inventors: Kim R. Smith, Erik C. Olson, Steven E. Lentsch
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Patent number: 8114343Abstract: Corrosion inhibitor compositions and methods of use are disclosed. Zinc and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.Type: GrantFiled: December 21, 2010Date of Patent: February 14, 2012Assignee: Ecolab USA, Inc.Inventors: Kim R. Smith, Erik C. Olson, Steven E. Lentsch
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Patent number: 8105531Abstract: Corrosion inhibitor compositions and methods of use are disclosed. Polyacrylate and calcium corrosion inhibitors combined with hypochlorite sources provide use solutions for effective corrosion inhibition for metal surfaces.Type: GrantFiled: December 21, 2010Date of Patent: January 31, 2012Assignee: Ecolab USA Inc.Inventors: Kim R. Smith, Erik C. Olson, Steven E. Lentsch
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Patent number: 7927510Abstract: The present invention is directed to a granular water treatment composition, comprising: 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. The present invention is also directed to a water treatment tablet, comprising 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition.Type: GrantFiled: April 20, 2007Date of Patent: April 19, 2011Assignee: Arch Chemicals, Inc.Inventors: Richard M. Mullins, Michael J. Unhoch
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Patent number: 7857990Abstract: Describes a composition comprising a mixture of (1) a major amount of calcium hypochlorite, e.g., hydrated calcium hypochlorite, and (2) a minor amount of calcium hypochlorite-compatible hydrophobic additive (other than discrete particulate Group IIA or IIIA metal stearates) in amounts sufficient to provide the composition with reduced hydrophilic properties. The composition has a solution rate in water at standard conditions that is less than the calcium hypochlorite used to prepare the composition, but sufficient for the intended application. Describes also calcium hypochlorite compositions in which the hydrophobic additive is an organo-silicon material, or a metal oxide, e.g., amorphous precipitated silica, treated with a hydrophobizing agent, such as an organo-silicon material, e.g., an organo-silane and/or organo-siloxane material.Type: GrantFiled: August 30, 2007Date of Patent: December 28, 2010Assignee: PPG Industries Ohio, Inc.Inventors: Stanley R. Pickens, Timothy A. Okel, Erik A. Schoenman, Shantilal M. Mohnot, Patrick Ryan
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Patent number: 7794607Abstract: 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.Type: GrantFiled: November 13, 2006Date of Patent: September 14, 2010Assignee: Truox, Inc.Inventor: Roy W. Martin
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Patent number: 7695639Abstract: Stable compositions of calcium hypochlorite containing selected hydrated inorganic salts having a sufficiently high enthalpy and the ability to provide water release to sufficiently quench reactions and reduce the potential for conflagration.Type: GrantFiled: March 17, 2008Date of Patent: April 13, 2010Inventor: John P. Garris
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Patent number: 7695631Abstract: 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.Type: GrantFiled: March 26, 2009Date of Patent: April 13, 2010Assignee: Truox, Inc.Inventor: Roy W Martin
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Patent number: 7572384Abstract: 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.Type: GrantFiled: October 16, 2008Date of Patent: August 11, 2009Assignee: Truox, Inc.Inventor: Roy W. Martin
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Patent number: 7572390Abstract: 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.Type: GrantFiled: September 14, 2005Date of Patent: August 11, 2009Assignee: Truox, Inc.Inventor: Roy W. Martin
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Patent number: 7476333Abstract: 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.Type: GrantFiled: June 22, 2005Date of Patent: January 13, 2009Assignee: Truox, Inc.Inventor: Roy W. Martin
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Patent number: 7465412Abstract: Calcium hypochlorite compositions that are classified as a Packing Group III Division 5.1 oxidizer material or as a non-Division 5.1 oxidizer material are described. In one embodiment, the compositions comprise an admixture of particulate calcium hypochlorite and particulate metaboric acid. The calcium hypochlorite is present in the composition in an amount and is of a concentration such that the composition would be classified as a Packing Group II Division 5.1 oxidizer in the absence of said particulate metaboric acid. Other embodiments described are solid shaped articles, e.g., tablets, comprising the described calcium hypochlorite-metaboric acid composition.Type: GrantFiled: February 24, 2005Date of Patent: December 16, 2008Assignee: PPG Industries Ohio, Inc.Inventors: Stanley R. Pickens, Fred Abraham, Donald W. DuBois
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Publication number: 20080258104Abstract: The present invention is directed to a granular water treatment composition, comprising: 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. The present invention is also directed to a water treatment tablet, comprising 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition.Type: ApplicationFiled: April 20, 2007Publication date: October 23, 2008Inventors: Richard M. Mullins, Michael J. Unhoch
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Patent number: 7431863Abstract: Describes a composition comprising a mixture of calcium hypochlorite and hydrated magnesium sulfate having an average of from 3 to 5.5 moles of water of hydration per mole of magnesium sulfate. The amount of hydrated magnesium sulfate in the composition is such that the composition has at least a DOT Packing Group III Division 5.1 Classification.Type: GrantFiled: March 8, 2006Date of Patent: October 7, 2008Assignee: PPG Industries Ohio, Inc.Inventor: Stanley R. Pickens
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Patent number: 7364669Abstract: Stable compositions of calcium hypochlorite containing selected hydrated inorganic salts having a sufficiently high enthalpy and the ability to provide water release to sufficiently quench reactions and reduce the potential for conflagration.Type: GrantFiled: June 4, 2007Date of Patent: April 29, 2008Assignee: BIO-Lab, Inc.Inventor: John P. Garris
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Patent number: 7201856Abstract: 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.Type: GrantFiled: January 30, 2004Date of Patent: April 10, 2007Assignee: Pur Water Purification Products, Inc.Inventors: Philip Frank Souter, Graeme Duncan Cruickshank, Barry Stoddart
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Patent number: 7179400Abstract: The invention is a stabilizer composition for halogen-containing polymers, comprising a carrier material of the general formula CaxAl2(OH)2(x+2)HPO3.m H2O, wherein x is a number from 2 to 12 and m is a number from 0 to 12, and a salt of a halogen-containing oxy acid or a mixture of two or more such salts, at least one salt of a halogen-containing oxy acid being present in finely distributed form on the carrier material, to a process for the preparation thereof, and to the use thereof.Type: GrantFiled: May 26, 2005Date of Patent: February 20, 2007Assignee: Baerlocher GmbHInventors: Bernd Frischkemuth, Christian Helbig
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Patent number: 7153438Abstract: A composition for disinfecting contaminated drinking water. The composition can include a disinfecting agent for disinfecting or sanitizing the water and a masking agent for masking or minimizing undesired characteristics of the disinfecting agent, such as taste and odor. The disinfecting agent can be a halogen-based disinfecting agent, such as a chlorine-based disinfecting agent. The masking agent can be a chlorine-compatible masking agent or flavorant, such as a citrus fruit derived flavor. The composition can also include a substrate. The substrate can be a clay, zeolite, water-soluble carrier, water-insoluble carrier, or mixtures thereof. The flavorant can be loaded onto the substrate. The composition can include other components, such as a primary coagulant, a coagulant aid, a bridging flocculant, a polymeric material, an alkali agent, an autocatalytic oxidant, and mixtures thereof.Type: GrantFiled: February 21, 2003Date of Patent: December 26, 2006Assignee: Pur Water Purification Products, Inc.Inventors: Philip Frank Souter, Colin Ure
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Patent number: 7045077Abstract: Stable compositions of calcium hypochlorite containing selected hydrated inorganic salts having a sufficiently high enthalpy and the ability to provide water release to sufficiently quench reactions and reduce the potential for conflagration.Type: GrantFiled: June 18, 2004Date of Patent: May 16, 2006Assignee: BioLab, Inc.Inventor: John P. Garris
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Patent number: 6776926Abstract: The present invention is drawn to a solid calcium hypochlorite particle having an available chlorine content of at least about 30% by weight and a water content of from about 2% to about 20% by weight; wherein said solid calcium hypochlorite particle is coated with about 0.01 to about 10% by weight of a deposit control agent comprising a sodium, potassium, lithium, calcium or magnesium salt of at least one of polyepoxysuccinic acid and polymaleic acid.Type: GrantFiled: August 9, 2001Date of Patent: August 17, 2004Assignee: United States Filter CorporationInventor: Roy Martin
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Patent number: 6638446Abstract: A non-Division 5.1 Oxidizer composition consisting essentially of a blend of hydrated calcium hypochlorite with magnesium sulfate heptahydrate, wherein the blend contains at least about 17% by weight of water based on the total weight of the blend.Type: GrantFiled: October 15, 2002Date of Patent: October 28, 2003Assignee: Arch Chemicals, Inc.Inventor: Richard M. Mullins
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Patent number: 6602442Abstract: A dry disinfectant composition for the production of aqueous solutions of chlorine dioxide of predetermined concentration is formulated of a mixture of lithium hypochlorite, sodium bisulfate and sodium chlorite. Special liquid and dry formulations are also contemplated for convenience of use, for quality assurance and for safety.Type: GrantFiled: October 12, 2000Date of Patent: August 5, 2003Assignee: Vulcan ChemicalsInventor: Anthony R. Pitochelli
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Patent number: 6461535Abstract: The present invention provides a process for removing arsenic from ground water to be processed and used in remote dwellings. The process includes (a) contacting a clay, a coagulant, and an oxidizer with water containing arsenic to form a coagulated colloidal mixture; (b) adsorbing the arsenic onto the coagulated colloidal mixture; and (c) separating the water from the coagulated colloidal mixture. The invention also provides a composition ready for use in removing arsenic from ground water to be used in remote areas. The composition includes an activated clay, a coagulant, and an oxidizer in predetermined proportions for efficient removal of arsenic from ground water.Type: GrantFiled: December 3, 1999Date of Patent: October 8, 2002Assignee: Pan American Health OrganizationInventor: MarĂa Luisa Castro de Esparza
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Patent number: 6197215Abstract: A dry disinfectant composition for the production of aqueous solutions of chlorine dioxide is formulated of a mixture of lithium hypochlorite, sodium bisulfate and sodium chlorite.Type: GrantFiled: February 25, 1999Date of Patent: March 6, 2001Assignee: Vulcan ChemicalsInventor: Anthony R. Pitochelli