Including Step Of Manufacturing Inorganic Treating Agent Patents (Class 210/716)
  • Patent number: 7314569
    Abstract: 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: Grant
    Filed: April 5, 2004
    Date of Patent: January 1, 2008
    Assignee: Arrowhead Center, Inc.
    Inventors: Fernando Cadena C., Michael D. Johnson
  • Patent number: 7279103
    Abstract: 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: Grant
    Filed: September 13, 2005
    Date of Patent: October 9, 2007
    Assignee: United States of America Enviromental Protection Agency
    Inventors: John Burckle, Rakesh Govind, Fred Kawahara, Richard Scharp, Henry Tabak
  • Patent number: 7077963
    Abstract: 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: Grant
    Filed: October 26, 2001
    Date of Patent: July 18, 2006
    Assignee: Nauveau Technology Investments
    Inventors: David M McConchie, Malcolm William Clark, Fiona Gaye Davies-McConchie
  • Patent number: 7048860
    Abstract: 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: Grant
    Filed: March 28, 2002
    Date of Patent: May 23, 2006
    Assignee: Nippon Steel Chemical Co., Ltd.
    Inventor: Tohru Oishi
  • Patent number: 6926878
    Abstract: 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: Grant
    Filed: May 21, 2003
    Date of Patent: August 9, 2005
    Inventor: Peter F. Santina
  • Patent number: 6923917
    Abstract: 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: Grant
    Filed: December 3, 1999
    Date of Patent: August 2, 2005
    Assignee: University of Maryland, College Park
    Inventor: Kristen J. Hughes
  • Patent number: 6916431
    Abstract: 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: Grant
    Filed: February 21, 2001
    Date of Patent: July 12, 2005
    Assignee: Nature Technology Solution AS
    Inventor: Stig Ovar Keller
  • Patent number: 6896817
    Abstract: 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: Grant
    Filed: April 15, 2002
    Date of Patent: May 24, 2005
    Inventor: Gregory S. Bowers
  • Patent number: 6863819
    Abstract: 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: Grant
    Filed: August 21, 2001
    Date of Patent: March 8, 2005
    Assignee: CSIR
    Inventor: Johannes Phillippus Maree
  • Patent number: 6843932
    Abstract: 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: Grant
    Filed: May 31, 2000
    Date of Patent: January 18, 2005
    Inventors: Kayohiko Tanimoto, Munehiko Kaga, Masami Gibo
  • Patent number: 6830696
    Abstract: 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: Grant
    Filed: December 1, 2003
    Date of Patent: December 14, 2004
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Hassan E. El-Shall, El-Sayed A. Abdel-Aal
  • Patent number: 6706197
    Abstract: 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: Grant
    Filed: January 7, 2002
    Date of Patent: March 16, 2004
    Assignee: Palm Beach Aggregates, Inc.
    Inventor: Thomas Emenhiser
  • Patent number: 6607667
    Abstract: 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: Grant
    Filed: September 4, 2002
    Date of Patent: August 19, 2003
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: James Neil Pryor, Linda Lee Crump
  • Publication number: 20030146169
    Abstract: 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: Application
    Filed: September 17, 2002
    Publication date: August 7, 2003
    Inventors: Lee Edward Ciampi, Gregory F. Smith, Bernie Knoble
  • Patent number: 6537464
    Abstract: 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: Grant
    Filed: October 31, 2001
    Date of Patent: March 25, 2003
    Assignee: General Chemical Corporation
    Inventors: Benjamin Shultes, III, Karen Elizabeth Ruehl, Teresa Antoinette Kristoff, Nicole Marie Gasiorowski
  • Patent number: 6527975
    Abstract: 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: Grant
    Filed: August 25, 2000
    Date of Patent: March 4, 2003
    Assignee: Minox Corporation USA
    Inventors: Ilangovan Kuppusamy, Ranjani Krishnan Ilangovan
  • Publication number: 20030019815
    Abstract: 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: Application
    Filed: May 24, 2002
    Publication date: January 30, 2003
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yoshiaki Koga, Takao Hasegawa, Hiroyuki Ookubo
  • Publication number: 20030010722
    Abstract: 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: Application
    Filed: July 12, 2002
    Publication date: January 16, 2003
    Inventor: Dudley John Mills
  • Publication number: 20020162801
    Abstract: 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: Application
    Filed: April 23, 2002
    Publication date: November 7, 2002
    Inventor: Yoshiyuki Sawada
  • Patent number: 6464883
    Abstract: 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: Grant
    Filed: June 4, 2001
    Date of Patent: October 15, 2002
    Inventor: Jai-Choon So
  • Patent number: 6454963
    Abstract: 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: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6454949
    Abstract: 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 precip
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Patent number: 6454962
    Abstract: 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: Grant
    Filed: September 19, 2000
    Date of Patent: September 24, 2002
    Assignee: Baffin, Inc.
    Inventors: Sahid Sesay, Edison Mbayo
  • Publication number: 20020130087
    Abstract: 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: Application
    Filed: May 21, 2001
    Publication date: September 19, 2002
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
  • Publication number: 20020121482
    Abstract: 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: Application
    Filed: July 12, 2001
    Publication date: September 5, 2002
    Inventors: Lee Edward Ciampi, Gregory F. Smith, Bernie Knoble
  • Patent number: 6419836
    Abstract: 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: Grant
    Filed: August 30, 1996
    Date of Patent: July 16, 2002
    Inventor: Thomas Willuweit
  • Patent number: 6419832
    Abstract: 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: Grant
    Filed: March 6, 2000
    Date of Patent: July 16, 2002
    Assignee: Kerr-McGee Chemical LLC
    Inventors: Garet Edward Van De Steeg, Anand S. Paranjape
  • Patent number: 6383398
    Abstract: 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: Grant
    Filed: January 26, 2001
    Date of Patent: May 7, 2002
    Inventor: Sultan I. Amer
  • Patent number: 6375919
    Abstract: 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: Grant
    Filed: June 20, 2000
    Date of Patent: April 23, 2002
    Assignee: Taki Chemical Co., Ltd.
    Inventors: Toshihiko Kakio, Tatsuo Tsukamoto
  • Patent number: 6358365
    Abstract: 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: Grant
    Filed: December 14, 1999
    Date of Patent: March 19, 2002
    Assignee: Hercules Incorporated
    Inventors: Fushan Zhang, Jimei Tong, Tom E. Taggart
  • Publication number: 20020027110
    Abstract: 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: Application
    Filed: September 13, 2001
    Publication date: March 7, 2002
    Inventors: Khaled Mahmud, James A. Belmont, Yakov E. Kutsovsky, Wayne Devonport, Meng-Jiao Wang, Collin P. Galloway, Gregory J. Mehos
  • Patent number: 6322701
    Abstract: 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: Grant
    Filed: June 16, 1999
    Date of Patent: November 27, 2001
    Assignee: Thocar Ltd.
    Inventor: Andreas Th Delighiannis
  • Patent number: 6319412
    Abstract: 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: Grant
    Filed: June 28, 2000
    Date of Patent: November 20, 2001
    Assignee: New Working Waters, LLC
    Inventor: Crispen Reyna
  • Patent number: 6306308
    Abstract: 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: Grant
    Filed: April 20, 1999
    Date of Patent: October 23, 2001
    Assignee: Nalco Chemical Company
    Inventors: Denis E. Hassick, Michael P. Flaherty, Pamela J. Dotter, Robert J. Guerrini
  • Patent number: 6207059
    Abstract: 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: Grant
    Filed: October 12, 1999
    Date of Patent: March 27, 2001
    Assignee: Achemco, Inc.
    Inventor: George A. Moore, III
  • Patent number: 6183650
    Abstract: 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: Grant
    Filed: October 13, 1999
    Date of Patent: February 6, 2001
    Assignee: Minerals Technologies Inc.
    Inventor: Donald Kendall Drummond
  • Patent number: 6174445
    Abstract: 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: Grant
    Filed: August 12, 1999
    Date of Patent: January 16, 2001
    Assignee: BR Technologies
    Inventors: Phillip B. Reilly, Jr., P. Brennan Reilly, III
  • Patent number: 6146539
    Abstract: 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: Grant
    Filed: March 23, 1999
    Date of Patent: November 14, 2000
    Assignees: Dudley Mills Pty Ltd, Innovez Pty Ltd
    Inventor: Dudley John Mills
  • Patent number: 6123854
    Abstract: 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: Grant
    Filed: July 8, 1998
    Date of Patent: September 26, 2000
    Assignee: Hinomaru Kogyo Corporation
    Inventors: Nobuo Iwane, Teruo Aoe, Takuma Miyazawa, Shigemi Aruga, Minoru Tanaka, Yoshitaro Tanaka
  • Patent number: 6110379
    Abstract: 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: Grant
    Filed: December 3, 1997
    Date of Patent: August 29, 2000
    Inventors: James Michael Overton, Stephen Ray Wurzburger
  • Patent number: 6093328
    Abstract: 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: Grant
    Filed: February 1, 1999
    Date of Patent: July 25, 2000
    Inventor: Peter F. Santina
  • Patent number: 6036935
    Abstract: 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: Grant
    Filed: December 17, 1998
    Date of Patent: March 14, 2000
    Assignee: Delta Chemical Corporation
    Inventor: James M. Dulko
  • Patent number: 5997838
    Abstract: 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: Grant
    Filed: December 17, 1998
    Date of Patent: December 7, 1999
    Assignee: Delta Chemical Corporation
    Inventor: James M. Dulko
  • Patent number: 5993669
    Abstract: 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: Grant
    Filed: September 28, 1998
    Date of Patent: November 30, 1999
    Assignee: Autopilot Systems, Inc.
    Inventor: Paul F. Fulmer
  • Patent number: 5980749
    Abstract: 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: Grant
    Filed: June 2, 1998
    Date of Patent: November 9, 1999
    Assignee: Light Year Technologies (USA) Inc.
    Inventor: David Deck Rendina
  • Patent number: 5958240
    Abstract: 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: Grant
    Filed: May 19, 1997
    Date of Patent: September 28, 1999
    Inventor: Timothy L. Hoel
  • Patent number: 5938970
    Abstract: 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: Grant
    Filed: June 11, 1997
    Date of Patent: August 17, 1999
    Assignee: General Chemical Corporation
    Inventors: Phillip B. Reilly, Jr., P. Brennan Reilly, III
  • Patent number: 5916447
    Abstract: 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: Grant
    Filed: October 15, 1997
    Date of Patent: June 29, 1999
    Assignee: Eka Chemicals AB
    Inventors: Felix Hulten, Goran Sivertsson
  • Patent number: 5904856
    Abstract: 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: Grant
    Filed: January 24, 1996
    Date of Patent: May 18, 1999
    Assignee: Kemira Kemi Aktiebolag
    Inventors: Magnus Kvant, Roger Barstrom
  • Patent number: 5897784
    Abstract: 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: Grant
    Filed: August 7, 1997
    Date of Patent: April 27, 1999
    Inventor: Dudley John Mills