Including Step Of Manufacturing Inorganic Treating Agent Patents (Class 210/716)
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Patent number: 7314569Abstract: The present invention comprises a method and composition using akaganeite, an iron oxide, as an ion adsorption medium for the removal of arsenic from water and affixing it onto carrier media so that it can be used in filtration systems.Type: GrantFiled: April 5, 2004Date of Patent: January 1, 2008Assignee: Arrowhead Center, Inc.Inventors: Fernando Cadena C., Michael D. Johnson
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Patent number: 7279103Abstract: Acidic metal-bearing wastewaters are treated to produce a finished water of sufficient purity to meet discharge standards while recovering metals removed in forms which are commercially valuable. The metals are selectively precipitated, either in a batch or in a continuous system, for removal of individual metal products in a specific sequence of steps from the wastewater. In each step, the pH is adjusted to the specific pH range and sulfide ion is introduced to precipitate the metals, excepting the removal of ferric iron and aluminum which is achieved using hydroxide precipitation. Bioconversion process using unique equipment converts sulfate in the wastewater to the hydrogen sulfide gas required for the precipitation process. This bioconversion process reduces the sulfate in the wastewater so that the water can be directly discharged or used for agricultural applications.Type: GrantFiled: September 13, 2005Date of Patent: October 9, 2007Assignee: United States of America Enviromental Protection AgencyInventors: John Burckle, Rakesh Govind, Fred Kawahara, Richard Scharp, Henry Tabak
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Patent number: 7077963Abstract: The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes for treatment of water containing dissolved inorganic substances involving stepwise treatment of the water in which the reacted bauxite refinery residues are added after the addition of a pH-raising additive. The invention also provides processes for treatment of water containing dissolved inorganic substances in which the reacted bauxite refinery residues are added stepwise, with one or more water treating additives also being added in at least one of the steps.Type: GrantFiled: October 26, 2001Date of Patent: July 18, 2006Assignee: Nauveau Technology InvestmentsInventors: David M McConchie, Malcolm William Clark, Fiona Gaye Davies-McConchie
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Patent number: 7048860Abstract: This invention relates to a method for treating acidic waste water, particularly mine effluent, and to a solid waste water treating material useful for the method. This waste water treating material is obtained by solidifying a mixture of rock wool and an inorganic binder mainly containing at least one kind selected from silicates, hydroxides and oxides of alkaline earth metals and alkali metals and has a porosity of 50% or more. When brought into contact with acidic waste water containing iron ions and sulfate ions, this waste treating material can not only neutralize the waste water but also remove harmful heavy metals such as iron and arsenic. Furthermore, it is easy to dispose the spent waste water treating material.Type: GrantFiled: March 28, 2002Date of Patent: May 23, 2006Assignee: Nippon Steel Chemical Co., Ltd.Inventor: Tohru Oishi
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Patent number: 6926878Abstract: Arsenic and TOC are removed from drinking water or wastewaters by use of finely-divided metallic iron in the presence of powered elemental sulfur or other sulfur compounds such as manganese sulfide, followed by an oxidation step. A premix may be produced for this process, by adding the iron, sulfur and oxidizing agent to water in a predetermined pH range. The iron and sulfur are mixed for a period of time dependent upon the temperature and pH of the water and the presence of complexing or sequestering minerals and organic acids in the water. An oxidizing agent is added to the mixture and agitating is continued. In a preferred embodiment the oxidizing agent is hydrogen peroxide. Water is decanted from the mixture after a sufficient reaction time, to produce a concentrated premix. This premix can be added to water intended for drinking or to industrial effluents containing toxic materials.Type: GrantFiled: May 21, 2003Date of Patent: August 9, 2005Inventor: Peter F. Santina
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Patent number: 6923917Abstract: The subject invention is related to a method for removing bio-available phosphorus from animal waste and soil using an industrial byproduct from a metal manufacturing process. The byproduct is used to treat organic waste, such as animal waste and poultry litter, and immobilize bio-available phosphorus present in them. The byproduct is also used to treat organic waste to produce fertilizers, which are used to amend the soil and control the level of phosphorous present in the soil. The disclosed method strikes a balance between providing enough nutrients to the soil to grow crops, while preventing loss of phosphorous to surface water.Type: GrantFiled: December 3, 1999Date of Patent: August 2, 2005Assignee: University of Maryland, College ParkInventor: Kristen J. Hughes
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Patent number: 6916431Abstract: The invention concerns, among other things, a precipitating chemical for separating preferably hydrocarbons from water, but also for separating other dissolved and/or suspended organic and/or inorganic substances and particles in an associated liquid, including mineral and/or rock particles, heavy metals, salts, phosphorous compounds, alcohols, lipids, aromatics and cellulose. The precipitating chemical is composed of bentonite, preferably sodium montmorillonite; of polymer, preferably of the polyacrylamide type; of sodium polyphosphate and/or lignite; and of water. The chemical is added to and mixed with waste liquid, after which chemical precipitation is activated through the addition of acid or base until the pH-value of the liquid mixture is 4.0 or less, or the pH-value being 8.0 or more. The liquid mixture then rests until the contaminant(s) flakes and separates from the liquid phase of the mixture and is then deposited or floated from the liquid mixture.Type: GrantFiled: February 21, 2001Date of Patent: July 12, 2005Assignee: Nature Technology Solution ASInventor: Stig Ovar Keller
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Patent number: 6896817Abstract: A product and method for the removal of pollutant heavy metals from aqueous solutions which precludes the end user from storing, handling, feeding and controlling hazardous soluble sulfide materials. The product is a slurry which includes a mixture of a liquid medium and an essentially insoluble salt wherein the salt is the reaction product of heavy metal ions, preferably selected from Mn++ ions, Fe++ ions, and Fe+++ ions, and sulfide ions derived from soluble sulfide sources such as sodium sulfide, hydrogen sulfide, and sodium hydrosulfide. Addition of the subject slurry to a wastewater stream will effect the precipitation of heavy metals with lesser equilibrium sulfide ion concentrations than that of the essentially insoluble salt. Solids collected by this method may be returned to subsequent wastewater streams for additional removal of heavy metals by any excess heavy metal sulfide salt.Type: GrantFiled: April 15, 2002Date of Patent: May 24, 2005Inventor: Gregory S. Bowers
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Patent number: 6863819Abstract: The invention provides a method treating acid raw water including the step of neutralising the water by adding calcium carbonate to it in a neutralising stage. The neutralised water is then rendered alkaline or more alkaline by adding an alkali thereto selected from calcium hydroxide, calcium oxide and mixtures thereof in a lime treatment stage. The alkaline water is then treated with carbon dioxide in a carbon dioxide treatment stage, with the carbon dioxide reacting in the carbon dioxide treatment stage with calcium hydroxide dissolved in the water.Type: GrantFiled: August 21, 2001Date of Patent: March 8, 2005Assignee: CSIRInventor: Johannes Phillippus Maree
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Patent number: 6843932Abstract: Contaminated sediments in such bodies of water as lakes and ponds, inner bays and rivers obtained by dredging are converted into favorable soils by adding to the contaminated sediments and aqueous solution formed by mixing an inorganic electrolytic coagulant obtained by mixing phosphonic acid and magnesium sulfate in a solvent not containing chlorine, stirring them for several minutes and then mixing aluminum sulfate and polyferric sulfate and stirring them for several minutes, together with a soil particle reinforcing agent and a pH controller.Type: GrantFiled: May 31, 2000Date of Patent: January 18, 2005Inventors: Kayohiko Tanimoto, Munehiko Kaga, Masami Gibo
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Patent number: 6830696Abstract: A method of treating spent alkaline pulping liquor (black liquor) includes the steps of providing black liquor containing lignin, and acidulating a phosphate containing material, wherein phosphoric acid is generated by the acidulating step. The black liquor is mixed with phosphoric acid from the acidulated phosphate containing material, wherein lignin is separated and clarified liquor results. The method can include the step of adding a water soluble, surface active, polymeric, coagulant agent to the black liquor before mixing with the phosphoric acid from the phosphate containing material. The clarified liquor comprises anion species including phosphate.Type: GrantFiled: December 1, 2003Date of Patent: December 14, 2004Assignee: University of Florida Research Foundation, Inc.Inventors: Hassan E. El-Shall, El-Sayed A. Abdel-Aal
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Patent number: 6706197Abstract: This invention provides a method for reducing phosphorous in a body of water. This method comprises calcining a plurality of rocks and collecting carbon dioxide formed as a result of the calcining process; crushing the plurality of calcined rocks; pumping source water from the body of water into to a plurality of retaining cells; flocculating the phosphorus in the source water by introducing the plurality of calcined rocks into the source water in the retaining cells; settling out a phosphorous precipitate formed by the flocculating act; adjusting the pH level of the flocculated source water to a predetermined range of values by pumping carbon dioxide created by the calcining of the rocks into the source water to created treated water; and transferring the treated water back to the body of water.Type: GrantFiled: January 7, 2002Date of Patent: March 16, 2004Assignee: Palm Beach Aggregates, Inc.Inventor: Thomas Emenhiser
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Patent number: 6607667Abstract: Method for Absorbing substances wherein adsorbent particles comprising superparamagnetic and/or low Curie Temperature transition metal-containing cores surrounded by a hydrous siliceous oxide coating can be formed by an aqueous process wherein the core is precipitated from an aqueous solution and a siliceous oxide coating is deposited thereon while complete drying of the core is avoided until after the siliceous oxide is deposited. The resulting siliceous adsorbents exhibit strong superparamagnetic and/or low Curie temperature magnetic properties with low transition metal leachability.Type: GrantFiled: September 4, 2002Date of Patent: August 19, 2003Assignee: W. R. Grace & Co.-Conn.Inventors: James Neil Pryor, Linda Lee Crump
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Publication number: 20030146169Abstract: Novel devices for synthesizing ferrate and uses thereof are described. One aspect of the invention relates to devices and systems for synthesizing ferrate at a site proximal to the site of use.Type: ApplicationFiled: September 17, 2002Publication date: August 7, 2003Inventors: Lee Edward Ciampi, Gregory F. Smith, Bernie Knoble
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Patent number: 6537464Abstract: A method of making poly aluminum chloride water treatment products comprising reacting an aluminum compound with a base at a temperature in the range of about 70 to 250° F., measuring the aluminum oxide content and adding water to the reaction product as needed to prepare a product having an aluminum oxide content of about 10 percent by weight of the solution.Type: GrantFiled: October 31, 2001Date of Patent: March 25, 2003Assignee: General Chemical CorporationInventors: Benjamin Shultes, III, Karen Elizabeth Ruehl, Teresa Antoinette Kristoff, Nicole Marie Gasiorowski
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Patent number: 6527975Abstract: A process for making a mineral oxide concentrate useful as a flocculent, coagulant and/or disinfectant for the treatment of water and wastewater comprises extracting minerals from a natural mineral deposit rich in aluminum, magnesium, potassium and iron; reducing the particle size of the extracted material to a fine particle size, followed by heat treating the resulting mineral-rich material in air to produce a controlled expansion of the material and to oxidize essentially all organic constituents and to evaporate all water, leaving a mass of expanded dried mineral oxide-rich material containing oxides of aluminum, magnesium, potassium and iron. The expanded oxide-rich material is dissolved in a liquid carrier, preferably an alkaline solution, but an acidic solution also can be used, to produce a concentrate in which the mineral oxides are available and useful for said water and wastewater treatment.Type: GrantFiled: August 25, 2000Date of Patent: March 4, 2003Assignee: Minox Corporation USAInventors: Ilangovan Kuppusamy, Ranjani Krishnan Ilangovan
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Publication number: 20030019815Abstract: The invention intends to provide metal-silica polymeric flocculants having high coagulation performance which are used for water treatment, particularly used to remove suspended materials and other impurities from irrigation water, waste water or the like, and can be stably prepared at low cost industrially.Type: ApplicationFiled: May 24, 2002Publication date: January 30, 2003Applicant: TOKUYAMA CORPORATIONInventors: Yoshiaki Koga, Takao Hasegawa, Hiroyuki Ookubo
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Publication number: 20030010722Abstract: Methods and compositions for removing phosphate from swimming pool waters are disclosed. The compositions include both soluble and substantially insoluble lanthanide carboxylates, preferred examples being lanthanum glycolate and lactate. The methods include the addition of the lanthanide compounds to the bulk of the pool water, but preferably involve the loading of the pool filter with the composition and the circulation of pool water through the filter to effect the removal of dissolved phosphate in the water.Type: ApplicationFiled: July 12, 2002Publication date: January 16, 2003Inventor: Dudley John Mills
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Publication number: 20020162801Abstract: Provided are an apparatus and a method for purification of water in which impurities in contaminated water can be removed with a reduced amount of flocculant and with high efficiency. The apparatus comprises, in the order from the side where contaminated water is introduced, an electrolysis tank (1) for electrolyzing the contaminated water, a gas mixing tank (2) for mixing carbon dioxide into the contaminated water electrolyzed, a coagulation tank (3) for mixing Fe3+ supplied from a flocculant producing device (7) to coagulate impurities in the contaminated water, and a floatation tank (4) for floating and separating the impurities coagulated. The electrolysis tank (1) electrolyzes the contaminated water to lower zeta potential of colloid particles in the contaminated water, and then the contaminated water is mixed with Fe3+ in the coagulation tank (3), thereby reducing the amount of positively charged Fe3+ to be added for neutralizing the colloid particles.Type: ApplicationFiled: April 23, 2002Publication date: November 7, 2002Inventor: Yoshiyuki Sawada
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Patent number: 6464883Abstract: The present invention relates to a remover of dissolved fluoride ion for removing fluoride ions contained in wastewater and a treatment method for wastewater containing fluoride using the same. In order to achieve the above objects, the present invention provides a remover of dissolved fluoride ion comprising: a) hydrochloric acid solution reacted with calcium carbonate, and b) a mixture of poly sodium metaphosphate and active aluminum or aqueous solution of mixtures thereof, or an aqueous solution of rare earth element compound, and a treatment method for wastewater containing fluoride using the same.Type: GrantFiled: June 4, 2001Date of Patent: October 15, 2002Inventor: Jai-Choon So
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Patent number: 6454963Abstract: An elixir for treating wastewater by transforming metal sulfates into metal hydroxides, breaking up chelated metals and transforming the freed metal ions into metal hydroxides, and precluding the metal hydroxides from dissolving back into solution. The elixir comprises: 1) calcium hydroxide, 2) METEX EPS, 3) sodium dimethyl dithiocarbamate, 4) calcium hypochlorite, 5) sodium hydroxide, 6) a combination of calcium salts and a first polymeric coagulant, 7) a second polymeric coagulant, and 8) water.Type: GrantFiled: September 19, 2000Date of Patent: September 24, 2002Assignee: Baffin, Inc.Inventors: Sahid Sesay, Edison Mbayo
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Patent number: 6454949Abstract: A process for removing metals from wastewater, which comprises the following: measuring the flow rate and oxidation reduction potential of wastewater as it is fed into a first treatment tank, adjusting the pH of the wastewater, adding a first liquid elixir to the wastewater to react with at least one metal in the wastewater to cause it to either precipitate out of solution, or convert into a form that will allow it to be precipitated out of solution by a second liquid elixir, and to bond with the metal to prevent it from re-dissolving back into solution, adding a second liquid elixir to the wastewater to react with at least one metal in the wastewater to cause it to precipitate out of solution, and to bond with the metal to prevent it from re-dissolving back into solution, feeding the wastewater into a second treatment tank, mixing a third liquid elixir and a fourth liquid elixir into the wastewater to flocculate and/or coagulate the precipitated metals, and separating the flocculated and/or coagulated precipType: GrantFiled: September 19, 2000Date of Patent: September 24, 2002Assignee: Baffin, Inc.Inventors: Sahid Sesay, Edison Mbayo
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Patent number: 6454962Abstract: An elixir for treating wastewater by transforming metals into metal sulfates and sulfides, breaking up chelated metals, and precluding the metal sulfates and sulfides from redissolving back into the wastewater. The elixir comprises: 1) ferrous sulfate heptahydrate, 2) aluminum sulfate, 3) 75% sulfuric acid, 4) a blend of aluminum salts and a polymeric coagulant, and 5) water.Type: GrantFiled: September 19, 2000Date of Patent: September 24, 2002Assignee: Baffin, Inc.Inventors: Sahid Sesay, Edison Mbayo
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Publication number: 20020130087Abstract: A coagulant which is the reaction product of a trivalent metal salt, excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.Type: ApplicationFiled: May 21, 2001Publication date: September 19, 2002Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
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Publication number: 20020121482Abstract: Novel methods and devices for synthesizing ferrate and uses thereof are described. One aspect of the invention relates to synthesizing ferrate at a site proximal to the site of use, another aspect of the invention relates to devices and methods for synthesizing ferrate.Type: ApplicationFiled: July 12, 2001Publication date: September 5, 2002Inventors: Lee Edward Ciampi, Gregory F. Smith, Bernie Knoble
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Patent number: 6419836Abstract: A composition for treatment of water and soils comprises components A. CaCO3, B. at least one compound selected from the group consisting of calcium salts, including CaCl2 and Ca(NO3)2, and inorganic magnesium compounds, C. at least one compound selected from the group consisting of NaHCO3 and KHCO3, wherein the components A and B are present in a molar ratio of from 0.1:1 to 1:1, and wherein the components B and C are present in a molar ratio of from 1:3 to 1:1.Type: GrantFiled: August 30, 1996Date of Patent: July 16, 2002Inventor: Thomas Willuweit
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Patent number: 6419832Abstract: A process for removing dissolved uranium from water is provided. The process basically comprises (a) mixing phosphoric acid or particulate bone ash with the water, (b) mixing calcium hydroxide with the mixture produced in step (a) to thereby form calcium hydroxy phosphate or calcium hydroxy apatite which reacts with and complexes at least a portion of the uranium in the water to form a precipitate thereof, and (c) separating the precipitate from the water.Type: GrantFiled: March 6, 2000Date of Patent: July 16, 2002Assignee: Kerr-McGee Chemical LLCInventors: Garet Edward Van De Steeg, Anand S. Paranjape
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Patent number: 6383398Abstract: A remediation agent and process produces a treated water that meets discharge standards required by local regulations and generates stabilized waste which does not require further treatment prior to disposal. The composition of the treatment chemical is applicable to the treatment of industrial wastewaters and more specifically those from automobile production, metal finishing, metal processing, oil refineries, textiles, wood treatment, tannery, circuit board manufacturing, and other miscellaneous industrial waste streams from operations such as paints, coatings, adhesives, soap and detergents, chemicals, and food processing.Type: GrantFiled: January 26, 2001Date of Patent: May 7, 2002Inventor: Sultan I. Amer
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Patent number: 6375919Abstract: A method for the manufacture of a ferric sulfate solution is provided, characterized in that, iron ore containing 30% by weight or more FeOOH as a trivalent iron (Fe3+) is calcined at 200-600° C., and then dissolved in sulfuric acid. A water treatment agent consisting of a basic ferric sulfate solution manufactured by the above mentioned manufacturing method is used as a coagulating agent for water treatment.Type: GrantFiled: June 20, 2000Date of Patent: April 23, 2002Assignee: Taki Chemical Co., Ltd.Inventors: Toshihiko Kakio, Tatsuo Tsukamoto
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Patent number: 6358365Abstract: Aqueous composition, including a water-soluble metal silicate complex which includes at least one divalent metal. A process for preparing an aqueous composition including water-soluble metal silicate complex includes combining monovalent cation silicate and divalent metal ions in an aqueous environment to form the water-soluble metal silicate complex. A process of modifying cellulose slurry includes adding an aqueous composition having water-soluble metal silicate complex which includes divalent metal to cellulose slurry. A process for preparing cellulose slurry includes adding monovalent cation silicate to cellulose slurry comprising a sufficient amount of divalent metal ions to combine with the monovalent cation silicate to form water-soluble metal silicate complex. A process of making cellulose product includes: adding an aqueous composition having water-soluble metal silicate complex including divalent metal to cellulose slurry; and forming cellulose product from the cellulose slurry.Type: GrantFiled: December 14, 1999Date of Patent: March 19, 2002Assignee: Hercules IncorporatedInventors: Fushan Zhang, Jimei Tong, Tom E. Taggart
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Publication number: 20020027110Abstract: A variety of methods to prepare a polymer composition containing at least one polymer and at least one modified pigment are described. The methods, in part, involve introducing a slurry containing at least one modified pigment into an emulsion or solution polymer prior to dewatering. Other polymer systems can be used including aqueous based polymerizations and solvent-based polymerizations, which can include free radical polymerizations. Other methods involve the formation of a modified pigment in the presence of an emulsion or solution polymer and then recovering the polymer composition containing the modified pigment. Compositions containing at least one modified pigment and the emulsion or solution polymer are also described as well as uses for the polymer compositions of the present invention.Type: ApplicationFiled: September 13, 2001Publication date: March 7, 2002Inventors: Khaled Mahmud, James A. Belmont, Yakov E. Kutsovsky, Wayne Devonport, Meng-Jiao Wang, Collin P. Galloway, Gregory J. Mehos
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Patent number: 6322701Abstract: A process for the treatment of waste waters containing chemically reducible dissolved organic and inorganic pollutants and suspended mater in particulate or colloidal form. The process comprises of contacting the water with metallic iron or ferrous ions (Fe2+), or mixtures thereof, in the presence of promoter metals, such as Cu, Pd, Pt, Au, Ag, and Ni, or oxides, sulfides and other insoluble compounds of these meals, which catalyze the redox reductions carried out by the iron or ferrous reagents. The production of ferric ions (Fe3+) as a final iron oxidation product allows for the simultaneous coagulation and precipitation of suspended colloidal and particulate solids out of the aqueous phase. In addition to the main reductive reaction scheme, the system performs a multitude of secondary reactions involving the ferrous and ferric ions produced in-situ which allows for the simultaneous removal of specific target pollutants, such as phosphate and hydrogen sulfide.Type: GrantFiled: June 16, 1999Date of Patent: November 27, 2001Assignee: Thocar Ltd.Inventor: Andreas Th Delighiannis
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Patent number: 6319412Abstract: This invention relates to wastewater treatment, process and preferred systems for practice of the process for the removal of organic and inorganic ingredients contaminating wastewater, thereby to allow the reuse or sewer discharge of water used in various manufacturing and other processes. The process of the invention typically involves initial filtration of the wastewater and contact with a paste mixture consisting of magnesium hydroxide, aluminum hydroxide, calcium carbonate, magnesium orthophosphate, ferric sulfate, sodium hydrocarbonate, and activated carbon, the activated carbon removing organics such as dyes and the like while the paste mixture precipitates inorganics for subsequent mechanical removal. After treatment with the paste mixture, precipitating compounds are added to precipitate other inorganics. Flocculating agents are then added for further clarification purposes. Material removal then occurs by mechanical extraction including filtration, settling and the like.Type: GrantFiled: June 28, 2000Date of Patent: November 20, 2001Assignee: New Working Waters, LLCInventor: Crispen Reyna
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Patent number: 6306308Abstract: A coagulant which is the reaction product of a trivalent metal salt (eg., FeCl3), excluding chromium salts, an acid phosphorous compound and an aluminum hydroxy chloride, and a process for preparing such coagulant. This coagulant may be effectively used to remove suspended solids and various impurities in most water treatment applications.Type: GrantFiled: April 20, 1999Date of Patent: October 23, 2001Assignee: Nalco Chemical CompanyInventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
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Patent number: 6207059Abstract: The present invention entails a composition and process for treating wastewater. The composition is made up of calcium hydroxide, bauxite, and activated carbon. This composition is mixed and continuously fed into a reactor(s) containing wastewater. The composition facilitates the settling and treating of solids for disposal as well as reducing odors and improving the color and quality of the wastewater to make it suitable for subsequent discharge. Additionally, a polymer can be added to promote flocculation and the further settling of suspended solids. An oxidant, such as chlorine gas, may also be added. In the case of chlorine gas, it reacts with ammonia nitrogen to convert the same to hydrochloric acid, water, and elemental nitrogen. Further, the present invention entails a chemical composition provided for reacting with hydrocarbon compounds and breaking them down so as to render them non-toxic and non-hazardous.Type: GrantFiled: October 12, 1999Date of Patent: March 27, 2001Assignee: Achemco, Inc.Inventor: George A. Moore, III
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Patent number: 6183650Abstract: A composition comprising the product precipitated in the admixing of a soluble metal salt and one or more compounds having a component selected from silicates, phosphates and borates; and a method for controlling drainage and/or retention in the formation of a paper matrix or for treating water comprising the use of such product.Type: GrantFiled: October 13, 1999Date of Patent: February 6, 2001Assignee: Minerals Technologies Inc.Inventor: Donald Kendall Drummond
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Patent number: 6174445Abstract: Polynucleate metal hydroxide anionic compounds and method for their production. The compounds have the formula: MaNb(OH)cXdYeZf.(H2O)g wherein M is a tri- or more valent metal ion; N is a divalent metal ion that forms a soluble salt with anions X, Y or Z; OH represents the level of basicity; X is a monovalent anion; Y is a divalent anion; Z is a trivalent anion; a is 1; b is from 0.15 to 2.0; c is from 0.3 to 5; d is from 0 to 3; e is from 0.1 to 2.25; f is from 0 to 1; and g is greater than 4 where the compound is in the form of an aqueous solution, or from 0 to 20 where the compound is not in the form of an aqueous solution. The compounds are useful for water treatment for removal of suspended solids and for various applications in the paper industry.Type: GrantFiled: August 12, 1999Date of Patent: January 16, 2001Assignee: BR TechnologiesInventors: Phillip B. Reilly, Jr., P. Brennan Reilly, III
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Patent number: 6146539Abstract: Methods and compositions are disclosed for treating swimming pool waters in order to remove one or more nutrients necessary for algal growth and to accelerate the breakdown of objectionable chloramines within chlorinated pool waters. The target nutrients of preference are those containing phosphorus or nitrogen. Phosphorus nutrients are preferably removed by ion-exchange with finely divided lanthanum carbonate, or by direct precipitation in the pool with liquid lanthanum chloride. Nitrogen nutrients (including, in particular, chloramines) may be removed (possibly with the aid of catalysts and in separate reactors). The same reagents used to scavenge phosphates are useful in this regard, the nitrogen being released from the pool water as a nitrogenous gas. To allow the fine lanthanum carbonates to be conveniently handled in the pool environment, they may be linked to larger carrier particles, such as those of diatomaceous earth, or they may be embedded within porous beads formed from polymers or gels.Type: GrantFiled: March 23, 1999Date of Patent: November 14, 2000Assignees: Dudley Mills Pty Ltd, Innovez Pty LtdInventor: Dudley John Mills
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Patent number: 6123854Abstract: A flocculant composition includes an aqueous solution of a mixture of titanyl sulfate or titanium tetrachloride with a water-soluble, neutral alkali or alkaline earth metal salt at a titanium to alkali or alkaline earth metal salt ratio calculated as TiO.sub.2 of from 0.25:1 to 0.0002:1 by weight. The flocculant composition may further contain a water soluble iron salt at a titanium to iron ratio calculated as TiO.sub.2 and Fe.sub.2 O.sub.3 of from 1:1 to 40:1 by weight, or a water-soluble zirconium salt at a titanium to zirconium ratio calculated as TiO.sub.2 and ZrO.sub.2 of from 1:1 to 40:1 by weight, or a water soluble aluminum salt at a titanium to aluminum ratio calculated as TiO.sub.2 and Al.sub.2 O.sub.3 of from 1:1 to 40:1 by weight.Type: GrantFiled: July 8, 1998Date of Patent: September 26, 2000Assignee: Hinomaru Kogyo CorporationInventors: Nobuo Iwane, Teruo Aoe, Takuma Miyazawa, Shigemi Aruga, Minoru Tanaka, Yoshitaro Tanaka
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Patent number: 6110379Abstract: An apparatus and method for removing contaminating metal ions and sulfate ions from acidic aqueous solution such as waste mine water which features passing the solution between pairs of electrodes, each pair of electrodes impressed with a voltage selected according to specific ion species and then adding chemical agents to raise the pH and form precipitates of the metal and sulfate ions. A magnetic field is applied during at least the first mixing step. The precipitate is then separated from the water with settling and filtering steps. The clarified solution is treated by reverse osmosis to concentrate the ammonium.Type: GrantFiled: December 3, 1997Date of Patent: August 29, 2000Inventors: James Michael Overton, Stephen Ray Wurzburger
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Patent number: 6093328Abstract: Arsenic and TOC are removed from drinking water or wastewaters by use of finely-divided metallic iron in the presence of powdered elemental sulfur or other sulfur compounds such as manganese sulfide, followed by an oxidation step. A premix may be produced for this process, by adding the iron, sulfur and oxidizing agent to water in a predetermined pH range. The iron and sulfur are mixed for a period of time dependent upon the temperature and pH of the water and the presence of complexing or sequestering minerals and organic acids in the water. An oxidizing agent is added to the mixture and agitating is continued. In a preferred embodiment the oxidizing agent is hydrogen peroxide. Water is decanted from the mixture after a sufficient reaction time, to produce a concentrated premix. This premix can be added to water intended for drinking or to industrial effluents containing toxic materials.Type: GrantFiled: February 1, 1999Date of Patent: July 25, 2000Inventor: Peter F. Santina
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Patent number: 6036935Abstract: The present invention is directed to a process for the production of polyaluminum chlorides and polyaluminum chlorosulfates useful as coagulants in water treatment. In addition, the invention is directed to the products made by the disclosed processes.Type: GrantFiled: December 17, 1998Date of Patent: March 14, 2000Assignee: Delta Chemical CorporationInventor: James M. Dulko
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Patent number: 5997838Abstract: The present invention is directed to a process for the production of polyaluminum chlorides and polyaluminum chlorosulfates useful as coagulants in water treatment. In addition, the invention is directed to the products made by the disclosed processes.Type: GrantFiled: December 17, 1998Date of Patent: December 7, 1999Assignee: Delta Chemical CorporationInventor: James M. Dulko
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Method and apparatus for optimizing electrolytic production of a halogen in a water treatment system
Patent number: 5993669Abstract: Method and apparatus for optimizing the electrolytic production of a halogen in a water treatment system having a halogen salt dissolved therein. The flow rate to the electrolytic cell is maintained below a predetermined maximum beyond which the remaining flow is diverted from the cell. The flow going to the cell is monitored for flow rate, water temperature and conductivity and the operation of the electrolytic cell is adjusted in response.Type: GrantFiled: September 28, 1998Date of Patent: November 30, 1999Assignee: Autopilot Systems, Inc.Inventor: Paul F. Fulmer -
Patent number: 5980749Abstract: Disclosed are methods for purifying solvents, by causing contaminants to be included within layers of dispersed layered materials, and then separating the restacked combined contaminant/layered material from the solvent. The methods may be utilized to remove materials suspended in the solvents, materials immiscible with the solvents, and are especially useful for separating soluble materials from the solvents within which they are dissolved. The application of these methods will be beneficial in the remediation of polluted soil and water, the desalination of water, waste oil and gray water purification, the preparation of pharmaceuticals, and many other areas.Type: GrantFiled: June 2, 1998Date of Patent: November 9, 1999Assignee: Light Year Technologies (USA) Inc.Inventor: David Deck Rendina
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Patent number: 5958240Abstract: An apparatus and method for treating waste water to generate clarified water for reuse in industrial processes which includes the steps of adding agents to the waste stream to generate floccules, aerating the waste stream to cause a portion of the floccules to float, decanting floating floccules and lighter than water immiscible pollutants from the top surface of the waste stream, directing the waste stream through an incline clarifier so as to permit heavier than water floccules to form sludge in a bottom region of the clarifier. Sludge and decanted pollutants are sent to a bioremediation tank where hydrocarbons are decomposed and the remaining sludge is dewatered and compacted to a solid condition for disposal in a public waste facility. The clarified water is transferred to a steam generator or pressurized water delivery system for reuse. The invention is particularly useful for equipment cleaning operations such as in truckyards or airports.Type: GrantFiled: May 19, 1997Date of Patent: September 28, 1999Inventor: Timothy L. Hoel
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Patent number: 5938970Abstract: Polynucleate metal hydroxide anionic compounds and method for their production. The compounds have the formula:M.sub.a N.sub.b (OH).sub.c X.sub.d Y.sub.e Z.sub.f.(H.sub.2 O).sub.gwhereinM is a tri- or more valent metal ion;N is a divalent metal ion that forms a soluble salt with anions X, Y or Z;OH represents the level of basicity;X is a monovalent anion;Y is a divalent anion;Z is a trivalent anion;a is 1;b is from 0.15 to 2.0;c is from 0.3 to 5;d is from 0 to 3;e is from 0.1 to 2.25;f is from 0 to 1; andg is greater than 4 where the compound is in the form of an aqueous solution, or from 0 to 20 where the compound is not in the form of an aqueous solution. The compounds are useful for water treatment for removal of suspended solids and for various applications in the paper industry.Type: GrantFiled: June 11, 1997Date of Patent: August 17, 1999Assignee: General Chemical CorporationInventors: Phillip B. Reilly, Jr., P. Brennan Reilly, III
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Patent number: 5916447Abstract: A method for treatment of water in which an aqueous solution containing a freshly made polymerised iron substance is produced, the produced polymerised iron substance is aged sufficiently long to provide for efficient treatment of water, and the aqueous solution containing aged polymerised iron substance is added to the water to be treated.Type: GrantFiled: October 15, 1997Date of Patent: June 29, 1999Assignee: Eka Chemicals ABInventors: Felix Hulten, Goran Sivertsson
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Patent number: 5904856Abstract: The present invention relates to a process for the preparation of solutions of aluminum salts, characterized in that an aluminate of an alkali metal and/or alkaline earth metal is dissolved in an acid solution to the formation of a solution which is used as such or is diluted to a suitable concentration.Type: GrantFiled: January 24, 1996Date of Patent: May 18, 1999Assignee: Kemira Kemi AktiebolagInventors: Magnus Kvant, Roger Barstrom
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Patent number: 5897784Abstract: Methods and compositions are disclosed for treating swimming pool waters in order to remove one or more nutrients necessary for algal growth and to accelerate the breakdown of objectionable chloramines within chlorinated pool waters. The target nutrients of preference are those containing phosphorus or nitrogen. Phosphorus nutrients are preferably removed by ion-exchange with finely divided lanthanum carbonate, or by direct precipitation in the pool with liquid lanthanum chloride. Nitrogen nutrients (including, in particular, chloramines) may be removed (possibly with the aid of catalysts and in separate reactors). The same reagents used to scavenge phosphates are useful in this regard, the nitrogen being released from the pool water as a nitrogenous gas. To allow the fine lanthanum carbonates to be conveniently handled in the pool environment, they may be linked to larger carrier particles, such as those of diatomaceous earth, or they may be embedded within porous beads formed from polymers or gels.Type: GrantFiled: August 7, 1997Date of Patent: April 27, 1999Inventor: Dudley John Mills