With Inorganic Matter Other Than Alkali-metal Hydroxides And Carbonates And Water Patents (Class 252/181)
  • Composition and method for inhibiting chloride-Induced corrosion and limescale formation on ferrous metals and alloys
    Patent number: 5948267
    Abstract: The present invention relates to a composition and method for inhibiting chloride-induced corrosion and limescale formation on ferrous metal surfaces and alloys in process systems in which aqueous solutions are concentrated, the composition containing a corrosion inhibiting amount of at least one polycarboxylic acid and/or its alkali metal or alkaline earth metal salts and a sufficient amount of a base to bring the water to a pH effective to inhibit both chloride-induced corrosion and limescale formation.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: September 7, 1999
    Assignee: Kay Chemical Company
    Inventors: Michael Whittemore, Gerald LaCosse, Jennifer Riley
  • Self flocculating separation medium and method
    Patent number: 5942115
    Abstract: Disclosed is a combined flocculating and clarifying medium for flocculating and separating solid particles from waste water comprising a mixture of solid filtering or aggregating particles and a dry flocculating agent effective to flocculate the solid particles to form larger and heavier aggregates with the filtering or aggregating particles in the waste water and filtering or gravity separating the formed aggregate from the waste water. Preferably, the filtering and aggregating particles are silicious particles, such as rice hull ash, diatomaceous earth, and perlite. The flocculating and clarifying medium can be combustible or can chemically fix the aggregated solid particles in a silicious cement, which solid particles can include heavy metal particles in silicious cement.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: August 24, 1999
    Assignee: enviroGuard, Inc.
    Inventor: Roy S. Rieber
  • Method and apparatus for treating an article containing an oxidizable organic compound
    Patent number: 5904960
    Abstract: A method includes providing an article having an oxidizable organic compound and an organoleptic compound; advancing the article toward a means for treating the article, the means for treating the article including a treating medium, and a means for applying the treating medium to the article; and applying the treating medium to a surface of the article so as to lower the amount of the organoleptic compound in the article. An apparatus is also disclosed.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: May 18, 1999
    Assignee: Cryovac, Inc.
    Inventors: Michael L. Becraft, Martin J. Ecoff, R. Karina Sylvia, Jeffrey A. Thomas
  • Biochemical media system for reducing pollution
    Patent number: 5876990
    Abstract: A first media provides an oxygen inducer such as catalase, bound and stabilized in pellet form so as to dissipate slowly into aqueous surroundings. A second media provides an oxygen supplier such as a peroxide, stabilized by combination with a proteinaceous compound such as urea and bound in a matrix that limits oxygen release. The two media are combined in aqueous environment to generate nascent oxygen at a modulated rate such that the oxygen is efficiently absorbed into the surrounding aqueous environment, promoting growth of aerobic species and reducing biological pollution. Specific adaptations demonstrate benefits of use in shrimp or fish ponds, raw milk, fruit juice, fresh food, silage and animal feed, fertilizer, plumbing systems, and grease traps. When used in ponds, further adaptations reduce algae and phytoplankton populations.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: March 2, 1999
    Inventors: Malireddy S. Reddy, Syama M. Reddy
  • Process for preventing the degradation of water soluble packaging films by halogenated hydantoins or chlorinated cyanuric acid and apparatus for disinfecting a water system
    Patent number: 5851406
    Abstract: A method to prevent the degradation of water soluble film placed in contact with halogenated hydantoin or chlorinated cyanuric acid and an apparatus for disinfecting water systems. Halogenated 5,5-dialkyl hydantoin or chlorinated cyanuric acid is combined with a stabilizing agent to prevent the halogenated hydantoin or chlorinated cyanuric acid from discoloring or degrading a polymeric film which it may contact. The oxidizing agent includes alkaline hydroxide, alkaline carbonates, alkaline bicarbonates, alkaline phosphates, alkaline silicates, and alkaline borates. Polymeric films for which this is suitable include 2-hydroxy propyl cellulose and poly(vinyl alcohol).
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: December 22, 1998
    Assignee: Bio-Lab, Inc.
    Inventors: Ronald L. Jones, P. Kirk Mitchell
  • Compositions and methods for treating water
    Patent number: 5814233
    Abstract: A method of remediating methyl amine and/or methyl amine derivative odors in aqueous systems by contacting the methyl amine or methyl amine derivative with a compound having amide or imide functionality, such as a hydantoin composition, in the presence of hydrogen peroxide. The amide/imide composition is preferably a non-halogenated, singe-ring hydantoin that binds methyl amines to the amide or imide functional group of the hydantoin.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: September 29, 1998
    Assignee: Great Lakes Chemical Corporation
    Inventors: Ron Starkey, Kysler DeGuzman, Geoffrey A. Brown, P. Kirk Mitchell
  • All-in-one treatment agent for cooling water
    Patent number: 5800732
    Abstract: An all-in-one cooling water treatment composition includes a high concentration of peroxide, preferably hydrogen peroxide, in combination with a polyhydric alcohol and a phosphonate to stabilize the peroxide in a concentrated solution. The composition further includes a yellow metal corrosion inhibitor such as aromatic triazole and optionally polymeric dispersants and ferrous metal corrosion inhibitors and/or molybdate metal corrosion inhibitors. In this composition the phosphonate, preferably HEDP, acts both to stabilize the peroxide and, at the same time, provides anti-scalant treatment for the cooling tower. Due to the stability provided by the HEDP and its anti-scalant properties, this can be formulated as an all-in-one treatment composition which is stable at high concentrations and can be added to effectively control biocidal activity, scale and corrosion.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: September 1, 1998
    Assignee: Diversey Lever, Inc.
    Inventors: Michael F. Coughlin, Lyle H. Steimel
  • Processes for the treatment of acidic liquors and for the production of commercial products thereby
    Patent number: 5800716
    Abstract: A process for the treatment of aqueous acidic liquors containing dissolved aluminum and/or iron compounds to produce an aluminum and/or iron sulfate water-treatment product is characterized by the combination of steps comprising contacting the liquor with a basic material capable of reacting with the dissolved aluminum and/or iron compound to precipitate aluminum and/or iron values, separating the precipitate in the form of a cake or slurry from the remaining liquor, treating the cake or slurry with sulfuric acid to re-dissolve aluminum and/or iron values and to produce a solution of aluminum and/or iron sulfate and separating suspended solid matter from the solution. The liquor may be a waste product from industrial processes or may be a mine effluent and the process avoids the need to dispose of these to waste.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: September 1, 1998
    Assignee: Laporte Industries Limited
    Inventors: Neil Clarke, John Harris Newton
  • Hydroxyimino alkylene phosphonic acids for corrosion and scale inhibition in aqueous systems
    Patent number: 5788857
    Abstract: This invention relates to the use of iminoalkylenephosphonic acids to prevent corrosion, including both localized corrosion and general corrosion on iron based metal surfaces in contact with a corrosive system water in an aqueous system. The invention also relates to the use of the iminoalkylenephosphonic acids to control formation, deposition and adherence of scale at the surfaces of metals in contact with a scale-forming system water in an aqueous system.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: August 4, 1998
    Assignee: Nalco Chemical Company
    Inventors: Bo Yang, Jiansheng Tang
  • Use of biodegradable polymers in preventing scale build-up
    Patent number: 5776875
    Abstract: A biodegradable scale inhibitor and dispersant is provided. The scale inhibitor includes a copolymer comprising at least one of N-oxygenatedhydrocarbonamide monomers and at least one of amino acid monomers. A method of reducing scale build-up on heating exchanger surfaces that come in contact with an industrial water is provided by adding a copolymer comprising at least one of N-oxygenatedhydrocarbonamide monomers and at least one of amino acid monomers to the water system such as cooling towers.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: July 7, 1998
    Assignee: Nalco Chemical Company
    Inventors: Jiansheng Tang, Ronald V. Davis
  • Hard water compatible phosphate-containing heat transfer fluids
    Patent number: 5766506
    Abstract: A heat transfer fluid is disclosed which comprises a glycol, a phosphate, and a copolymer additive which is a copolymer of an ethylenically substituted carboxylic acid and an aldehyde. A method for preparing the heat transfer fluid comprises admixing 92 to 96 weight percent of one or more glycols; 2 to 4 weight percent of a phosphate; and 0.01 to 0.25 weight percent of the copolymer additive. Precipitation of phosphate salts is inhibited in phosphate-containing glycol-based fluids by the addition of the copolymer additive before mixing the fluid with water.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: June 16, 1998
    Assignee: The Dow Chemical Company
    Inventors: Abel Mendoza, Mark E. Ogle
  • Compound for removing alkaline earth metal scale deposits and silica-based scale deposits
    Patent number: 5762821
    Abstract: Alkaline earth metal scales, particularly barium sulfate and strontium sulfate, and silica-based scales, particularly potassium fluorosilicate, are removed from industrial processing equipment, tubular goods, and other scaled materials with a composition comprising sufficient potassium base to provide an overall system pH of between about 12.0 to about 14.0, a polyaminocarboxylic acid, preferably EDTA, a hydroxycarboxylic acid synergist, a pH buffering agent, a wetting agent, and optionally a sodium base.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: June 9, 1998
    Assignee: Ambar, Inc.
    Inventor: Robert D. Tate
  • Inhibition of calcium oxalate scale in aqueous based solutions
    Patent number: 5755971
    Abstract: A method of inhibiting the precipitation and deposition of calcium oxalate scale in an aqueous system is disclosed, in which an effective amount of a combination of a high molecular weight lignosulfonate compound and a phosphate compound is added to the system.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: May 26, 1998
    Assignee: BetzDearborn Inc.
    Inventors: William J. Palardy, Nancy A. DiAngelo
  • Use of biodegradable polymers in preventing corrosion and scale build-up
    Patent number: 5750070
    Abstract: A biodegradable corrosion inhibitor, scale inhibitor and dispersant is provided. The inhibitor comprises one or more polymers from a family of poly(amino acid) polymers that include hydroxamic acid-containing sidechains. Methods of reducing corrosion and scale build-up and a method of dispersing solid particulates in a solution or slurry are provided by adding a polymer of the present invention to a solution or slurry.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: May 12, 1998
    Assignee: Nalco Chemical Company
    Inventors: Jiansheng Tang, Raymond T. Cunningham, Bo Yang
  • Stabilization of biowastes
    Patent number: 5736032
    Abstract: Biowaste treatment agents for treating biowastes in a manner which: (a) keeps noxious and toxic substances from being released from the biowaste, and (b) neutralizes such substances released during the course of stabilizing the biowaste. The treatment agents include a surfactant in an amount of from 1.0 to 99 percent of the treatment agent, a metal component in an amount from 0.5 to 85 percent of the treatment agent, the metal component including a source of zinc, or copper, or a combination of copper with aluminum or iron, and an aldehyde in an amount from 0.1 to 80 percent of the treatment agent.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: April 7, 1998
    Inventors: James P. Cox, Robert W. Duffy Cox
  • Method for precipitating a solid phase of metal
    Patent number: 5730873
    Abstract: The invention herein provides a method for the time delayed precipitation of a solid phase of metal from a low pH, metal salt solution comprising adding to the metal solution a substrate, such as an amide, and an enzyme, such as an amidase, which will react with the substrate, which causes a rise in pH upon the reaction of the substrate with the enzyme. The rise in pH causes the metal to precipitate from solution. The precipitated metal is useful for emplacing metal hydroxides for providing sorptive material useful for removing contamination from groundwater.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: March 24, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Alison Marie Hapka, Joyce May Whang, Jeffery Scott Thompson
  • Water-treating agent and method for treating water
    Patent number: 5716529
    Abstract: A water-treating agent comprising a ternary copolymer of conjugated dienesulfonic acid/(meth)acrylic acid/2-hydroxyethyl (meth)acrylate, or a ternary copolymer of conjugated dienesulfonic acid/(meth)acrylic acid/(meth)acrylamido-2-methylalkanesulfonic acid ternary copolymer, is effective against scaling and fouling in water systems and a method for treating water with the water-treating agent. When combined with a corrosion inhibitor, the water-treating agent exhibits an excellent anti corrosion effect.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: February 10, 1998
    Assignees: Kurita Water Industries Ltd., Japan Synthetic Rubber Co., Ltd.
    Inventors: Takashi Suzuki, Hideo Morinaga, Katsuhiro Ishikawa, Akihide Hirano
  • Process for detoxicating noxious wastes and a detoxicating agent used for the process
    Patent number: 5714085
    Abstract: Noxious wastes are detoxicated by admixing a detoxicating agent to noxious wastes containing heavy metals, PCB, or the like and eliminating noxious materials in the wastes, in which the detoxicating agent comprises sodium, potassium, calcium, lithium, barium, magnesium, strontium, cobalt or nickel, copper and zinc contained in an ionic state to a diluted aqueous solution comprising tannin and pyrolignous acid as the main ingredient. Further, the detoxicating agent is admixed together with cement to the noxious wastes containing heavy metals, PCB or the like, thereby eliminating noxious substances in the wastes and solidifying them.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: February 3, 1998
    Inventors: Toyohisa Eto, Masao Sugihara
  • Use of water-soluble polymers and polyhydroxymono- or dicarboxylates in the bleaching of textiles
    Patent number: 5704947
    Abstract: The deposition of magnesium and calcium silicate in the bleaching of textiles with peroxides is prevented by contacting the textiles with a bleaching composition that is free from phosphorous and contains water-soluble polymers containing sulfonate and carboxylate groups, and polyhydroxymono- or dicarboxylates.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: January 6, 1998
    Inventors: Heribert Kaiser, Christian Nitsch, Claus-Peter Kurzendoerfer, Bernd Wahle, Bernd-Dieter Baehr, deceased, Sylvia Baehr, executrix, Hildegard Van Delden
  • Methods for inhibiting the production of slime in aqueous systems
    Patent number: 5695652
    Abstract: Methods for inhibiting the attachment of microbes to surfaces in aqueous systems are disclosed.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: December 9, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Roy Hernandez-Mena, Richard J. Sujdak
  • Water purification composition, kit and method employing the same
    Patent number: 5681475
    Abstract: A composition, in unit dosage form, for the batchwise purification for drinking purposes of a relatively small predetermined volume of contaminated water includes: (a) an organo-chlorine compound serving as a disinfectant-sanitizing agent; (b) a solid inorganic metal salt having a trivalent cation serving as a coagulant-precipitate agent; (c) a solid alkali which is highly soluble in water and highly effervescent in the presence of an acid serving as a dispersion-buffer agent; (d) a solid anionic polymeric hydrophilic primary colloid flocculant; (e) a solid cationic, polymeric hydrophilic secondary colloid flocculant; (f) long fiber cellulose serving as an agglomeration matrix and pre-filter for absorbing flocs and trapping visible debris and cysts; and (g) a bulk ion exchange absorbent. A water purification kit and method employing the composition are also disclosed.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: October 28, 1997
    Assignee: Truetech, Inc.
    Inventors: Marc Lamensdorf, William R. Holub
  • Method and compositions for treating recirculating water systems
    Patent number: 5670059
    Abstract: A novel method and compositions are disclosed for the treatment of water in recirculating water systems. The method includes providing a boron level of at least 20 ppm in the water, continually eroding into the water a compressed sanitizer/algicide component including a halogen source material, a boron source material, and glycoluril, and periodically adding to the water an oxidizing clarifier comprising a chlorine source material, a non-halogen, chlorine source material, and a boron source material. The invention also provides novel water treatment chemicals including the compressed sanitizer/algicide component and the clarifier useful in the foregoing system. The system and compositions are safe and reliable, control algal and fungal growth and generally provide improved water quality for recirculating water systems.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: September 23, 1997
    Assignee: Bio-Lab, Inc.
    Inventors: Ronald L. Jones, Stephen L. Carlyle, Susan M. Shelor, Presley K. Mitchell, Ellwood LeRoy Lines, Jr.
  • Stabilizers for additives in aqueous systems containing ozone
    Patent number: 5662803
    Abstract: The invention is a method for increasing the effectiveness of water-soluble polymeric additives or water-soluble phosphonates in the recirculating water of processing equipment wherein said water contains ozone and water-soluble polymeric additives or water-soluble phosphonates comprising the step of adding an effective amount of a stabilizer to said waters. The invention is also a method for increasing the effectiveness of ozone treatment in the recirculating waters of processing equipment wherein said water contains ozone and water-soluble additives comprising the step of adding an effective amount of a stabilizer to said waters.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: September 2, 1997
    Assignee: Nalco Chemical Company
    Inventor: Paul R. Young
  • Method of inhibiting sulfate scale in aqueous systems using poly(amino acids)
    Patent number: 5658464
    Abstract: The present invention provides a method for inhibiting the formation of metal sulfate scale in an aqueous system. Metal sulfate scale formation is inhibited by adding an effective amount of one or more poly(amino acids) and one or more inorganic phosphates to the aqueous system. The poly(amino acids) are a reaction product formed from at least one compound selected from amino acids, amic acids, ammonium salts of monoethylenically unsaturated dicarboxylic acids, and ammonium salts of hydroxypolycarboxylic acids. The present invention also provides a method of inhibiting the formation of metal sulfate scale by adding an effective amount of a poly(amino acid) which contains tyrosine, tryptophan, histidine, arginine or combinations thereof.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: August 19, 1997
    Assignee: Rohm and Haas Company
    Inventors: William Mathis Hann, Yi Hyon Paik, Susan Tabb Robertson, Graham Swift
  • Agent for treatment of paper machine press section felts and its use
    Patent number: 5651812
    Abstract: An agent for treatment of paper machine press section felts is described which comprises one or more anionic polymers having a weight average molecular weight of 500 to less than 5000 selected from polycarboxylic acids and derivatives thereof, and/or 2-phosphino-1,2,4-tricarboxybutane. The novel agent, which preferably comprises a surfactant, inhibits the blinding of paper machine press section felts and provides improved felt conditioning at much lower concentration levels than known commercial products.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 29, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Michael Anthony McDermott, Jurgen Friedrich Schuetz
  • Hardness suppression in urea solutions
    Patent number: 5645756
    Abstract: The tendency of aqueous solutions of urea and other NH-containing compositions to force instability of hardness factors has been found to be detrimental to processes and apparatus employing them. The reliability of these processes and apparatus is improved by the inclusion of hardness-suppressing compositions, which preferably include both a water-soluble polymer and a phosphonate. In particular, agricultural and NO.sub.x -reducing applications are improved, especially for solutions containing urea hydrolysis products and the salts of them.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 8, 1997
    Assignee: Nalco Fuel Tech
    Inventors: Leonard Dubin, W. Robert Epperly, Barry Normand Sprague, Thure von Harpe
  • Colloidal silica/polyelectrolyte blends for natural water clarification
    Patent number: 5620629
    Abstract: This invention relates to a composition of matter of a silica sol/water soluble cationic polymer mixture. The colloidal silica may also be conditioned by passing over a cationic exchange resin prior to addition of cationic polymer.
    Type: Grant
    Filed: November 26, 1995
    Date of Patent: April 15, 1997
    Assignee: Nalco Chemical Company
    Inventors: Kristine S. Salmen, Pek L. Choo, David A. Picco, Michio Kobayashi
  • Inhibition of scale and corrosion in aqueous systems
    Patent number: 5616278
    Abstract: A method and compounds for inhibiting the formation of scale, e.g., barium scale, and controlling corrosion is disclosed. The method is particularly effective at inhibiting or preventing corrosion of ferrous-based metals in contact with the aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a compound of the general formula: ##STR1## wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl; Z is O, S, NH or NR, where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is hydrogen, a water soluble cation (e.g., NH.sub.4.sup.+, alkali metal), or a C.sub.1-3 alkyl group.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: April 1, 1997
    Assignee: BetzDearborn Inc.
    Inventors: William S. Carey, Andrew Solov, Libardo A. Perez, Donald T. Freese
  • Boiler water treatment composition
    Patent number: 5603862
    Abstract: There disclosed a boiler compound which comprises as the effective components thereof: (A) metabisulfurous acid or metabisulfites; (B) aliphatic dicarboxylic acids or salts thereof represented by the general formula:M.sup.1 OOC--(CH.sub.2).sub.n --COOM.sup.,wherein M.sup.1 and M.sup.2 are each a hydrogen atom, a sodium atom, a potassium atom or an ammonium group and n is an integer of 1 to 10; and optionally (C) a water-soluble polymer for scale inhibitor. The boiler compound is safe for human health, has excellent stability, can be used as a liquid formulation having anticorrosion activity (activity of eliminating oxygen) or both of anticorrosion activity and antiscale activity and exhibits enhanced anticorrosion activity by increasing concentration of sulfite ion which is an oxygen scavenger.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: February 18, 1997
    Assignee: Kurita Water Industries Ltd.
    Inventors: Shiro Taya, Takayasu Ueda, Moriyasu Itoh
  • Stabilization of biowastes
    Patent number: 5589164
    Abstract: Biowaste treatment agents for treating biowastes in a manner which: (a) keeps noxious and toxic substances from being released from the biowaste, and (b) neutralizes such substances released during the course of stabilizing the biowaste. The treatment agents include a surfactant in an amount of from 1.0 to 99 percent of the treatment agent, a metal component in an amount from 0.5 to 85 percent of the treatment agent, the metal component including a source of zinc, or copper, or a combination of copper with aluminum or iron, and an aldehyde in an amount from 0.1 to 80 percent of the treatment agent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 31, 1996
    Inventors: James P. Cox, Robert W. Duffy Cox
  • Stabilization of biowastes
    Patent number: 5587157
    Abstract: Biowaste treatment agents for treating biowastes in a manner which: (a) keeps noxious and toxic substances from being released from the biowaste, and (b) neutralizes such substances released during the course of stabilizing the biowaste. The treatment agents include a surfactant in an amount of from 1.0 to 99 percent of the treatment agent, a metal component in an amount from 0.5 to 85 percent of the treatment agent, the metal component including a source of zinc, or copper, or a combination of copper with aluminum or iron, and an aldehyde in an amount from 0.1 to 80 percent of the treatment agent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 24, 1996
    Inventors: James P. Cox, Robert W. Duffy Cox
  • Corrosion inhibiting compositions for aqueous systems
    Patent number: 5578246
    Abstract: This invention relates to a metal corrosion inhibiting composition comprising in admixture: (a) an anodic silicate salt; (b) a silicate salt stabilizer; (c) a cathodic corrosion inhibitor; and water. Preferably, the corrosion inhibiting composition also contains a polymeric scale inhibitor. The invention also relates to a process for treating an open aqueous system with the corrosion inhibiting composition.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: November 26, 1996
    Assignee: Ashland Inc.
    Inventor: Edward S. Beardwood
  • Water-softening compositions
    Patent number: 5575946
    Abstract: Water-softening formulations which comprise:(a) a biodegradable copolymer;(b) an inorganic water-softening silicate; and, optionally,(c) another inorganic salt;(d) a dispersing and complexing agent; and(e) a surfactant and also additional customary additives have improved biodegradability.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: November 19, 1996
    Assignee: Chemische Fabrik Stockhausen GmbH
    Inventors: Rudolf Beck, Frank Krause, Udo Schoenkaes
  • Method of inhibiting scale and controlling corrosion in cooling water systems
    Patent number: 5575920
    Abstract: A method for simultaneously controlling the deposition of scale and the formation of corrosion in a cooling water system consisting of adding to the system a water soluble copolymer having the structure: ##STR1## wherein R.sub.1 is H or lower (C.sub.1 -C.sub.4) alkyl, F is H.sub.2 or O, M is a water soluble cation, R.sub.2 is (CH.sub.2 --CH.sub.2 --O).sub.n, ##STR2## or mixture of both, n is an integer of from 1 to about 40, R.sub.3 is H, lower (C.sub.1 -C.sub.4) alkyl or an acetate.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: November 19, 1996
    Assignee: BetzDearborn Inc.
    Inventors: Donald T. Freese, Libardo A. Perez, Keith A. Bair, Fu Chen
  • Stabilization of polyether polyamino methylene phosphonate scale inhibitors against degradation by bromine and chlorine biocides
    Patent number: 5565106
    Abstract: Polyether polyamino methylene phosphonates, which possess high calcium tolerance and have been found to give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, in aqueous systems involving severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate, are degraded by the oxidizing biocides bromine and chlorine used to control microbial growth in such aqueous systems. It has been found that organic sulfonamides provide excellent protection against such degradation when they are added to the aqueous system along with the polyether polyamino methylene phosphonate scale inhibitors.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: October 15, 1996
    Assignee: Calgon Corporation
    Inventors: Ann M. Sherbondy, Daniel P. Vanderpool
  • Copolymers of polyaspartic acid and polycarboxylic acids and polyamines
    Patent number: 5527863
    Abstract: Copolymers of polyaspartic acid which are suitable for the inhibition of scale deposition were obtained by reacting maleic acid, an additional polycarboxylic acid and ammonia in a stoichiometric excess, at 120.degree.-350.degree. C., preferably 180.degree.-300.degree. C., to provide copolymers of polysuccinimide. In a second embodiment, a polyamine was added to the reaction mix. These intermediate polysuccinimide copolymers could then be converted to the salts of copolymers of polyaspartic acid by hydrolysis with a hydroxide.Such copolymers are useful in preventing deposition of scale from water and find applications in treating water. Other applications include scale prevention additives for detergents. In addition, such copolymers inhibit dental tartar and plaque formation.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: June 18, 1996
    Assignee: Bayer AG
    Inventors: Louis L. Wood, Gary J. Calton
  • Composition for water treatment containing polyaspartic acidora derivative thereof and a polcarboxylic acid and methods of using the composition
    Patent number: 5525257
    Abstract: An improved composition for water treatment and for alkaline cleaning contains polyaspartic acid or a derivative thereof and a polycarboxylic acid.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: June 11, 1996
    Assignee: Bayer AG
    Inventors: Roland Kleinstuck, Hermann Sicius, Torsten Groth, Winfreid Joentgen
  • Method of making an environmentally safe, ready-to-use, non-toxic, non-flammable, inorganic, aqueous cleaning composition
    Patent number: 5520837
    Abstract: A cleaning composition, method of manufacture and method of cleaning of for se in cleaning equipment including life support equipment employed in the generating, handling, storage and delivery of oxygen-enriched gases and liquids are provided in which the cleaning composition is inorganic, non-flammable, non-toxic, environmentally safe, non-corrosive, and ready to use and which includes an aqueous silicate solution together with fluoroborates and molybdates.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: May 28, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Neil E. Antin, Douglas P. Jackson
  • Method and compositions for treating recirculating water systems
    Patent number: 5514287
    Abstract: A novel method and compositions are disclosed for the treatment of water in recirculating water systems. The method includes providing a boron level of at least 20 ppm in the water, continually eroding into the water a compressed sanitizer/algicide component including a halogen source material, a boron source material, and glycoluril, and periodically adding to the water an oxidizing clarifier comprising a chlorine source material, a non-halogen, chlorine source material, and a boron source material. The invention also provides novel water treatment chemicals including the compressed sanitizer/algicide component and the clarifier useful in the foregoing system. The system and compositions are safe and reliable, control algal and fungal growth and generally provide improved water quality for recirculating water systems.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: May 7, 1996
    Assignee: BioLab, Inc.
    Inventors: Ronald L. Jones, Stephen L. Carlyle, Susan M. Shelor, Presley K. Mitchell, Ellwood L. Lines, Jr.
  • Alkyl-allylphosphonate copolymer used for boiler water treatment
    Patent number: 5512183
    Abstract: A water soluble isopropenylphosphonic acid copolymer composition and method of use thereof are disclosed. The copolymer comprises repeat units (a) of the formula: ##STR1## wherein X=OH or OM, wherein M is a cation, and repeat units (b) of the formula: ##STR2## wherein R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-10 linear or branched alkyl, phenyl or alkyl substituted phenyl. The copolymers are effective in inhibiting the precipitation of scale forming salts and also act to inhibit corrosion in boiler water systems.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: April 30, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Scott M. Boyette, Alan E. Goliaszewski
  • Low pH Acidic Compositions
    Patent number: 5512200
    Abstract: Low pH acidic compositions for uses related generally to chemical, pharmaceutical and cosmetic agents and more particularly, but not limited to, used as bactericides, fungicides, germicides and virucides; all having pH values of less than about 2.0 in their final form. These low pH acidic compositions generally comprise two phases in solution. Phase I comprises from about 2 to about 98 weight percent of varying percentages of several chemical, pharmaceutical and cosmetic substances.Phase II comprises from about 2 to about 99 weight percent of an active aqueous acidic component having a pH value of less than about 1.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: April 30, 1996
    Assignee: Thomas G. Bongard
    Inventor: Silverio M. Garcia
  • Amino acid copolymers of maleic acid
    Patent number: 5496914
    Abstract: Polymers of maleic, fumaric or malic acids or maleic, fumaric or malic acid and ammonia with amino acids are prepared by heating at 180.degree.-350.degree. C., preferably 200.degree.-300.degree. C. The polymer formed may be converted to a salt by hydrolysis with a metal hydroxide or ammonium hydroxide.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: March 5, 1996
    Assignee: SRCHEM, Inc.
    Inventors: Louis L. Wood, Gary J. Calton
  • Detergent composition and method of use with surfactant, silicate, and polycarboxylate
    Patent number: 5494488
    Abstract: A detergent composition with improved dirt-suspending power, method for its production and use of a suitable polycarboxylate for this purpose. The novel detergent contains, in addition to the customary components such as surfactant, calcium-binding silicate, etc., at least 1% by weight of a polycarboxylate with the schematic structure (X, Y, Z) in which X stands for ##STR1## Y for ##STR2## and Z for--(F).sub.q --.These carboxylates can be produced from acrolein and optionally one or several comonomers by means of oxidizing radical donors without saponifying conditions and/or without subsequent Cannizzaro reaction. The novel detergents exhibits improvements over traditionally used co-builders in all essential detergent qualities. The carboxylates may be used in detergents, fine-fabric detergents, color detergents, liquid detergents and compact detergents.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: February 27, 1996
    Assignee: Degussa Aktiengesellschaft
    Inventors: Detlef Arnoldi, Wolfgang Leonhardt, Beata-Maria Lortz, Maurizio Ragnetti
  • Control of scale formation in aqueous systems
    Patent number: 5489666
    Abstract: A method and compounds for inhibiting the formation of scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of calcium scales in circulating aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a compound of the general formula: ##STR1## wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl; Z is 0, S, NH, or NR, where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is hydrogen, a water soluble cation (e.g., NH.sub.4.sup.+, alkali metal) or a C.sub.1 -C.sub.3 alkyl group.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: February 6, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Andrew Solov, Donald T. Freese, Libardo A. Perez
  • Composition for dehalogenation and degradation of halogenated organic contaminants
    Patent number: 5480579
    Abstract: A method of creating an environment which promotes dehalogenation and/or degradation of halogenated organic chemical contaminants in water, sediment, or soil by adding a combination of fibrous organic matter and certain multi-valent metal particles to the water, sediment or soil.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: January 2, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Alan G. Seech, James E. Cairns, Igor J. Marvan
  • Flocculating agent containing aluminum and a polybasic carboxylic acid
    Patent number: 5474703
    Abstract: A method of clarifying bodies of water and eliminating algal bloom caused by planktonic algae in water harboring biological systems is described using a novel flocculating agent prepared in an aqueous solution containing a combination of a monomeric or polymeric aluminum salt and a polybasic carboxylic acid; the method results in complete clarification of the body of water without harming fish that may be present; a preferred flocculating agent described includes a combination of polymeric aluminum hydroxy-chloride and L-(+)-tartaric acid.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: December 12, 1995
    Assignee: Warner-Lambert Company
    Inventor: Gunter Ritter
  • Methods of controlling scale formation in the presence of metal ions in aqueous systems
    Patent number: 5468393
    Abstract: A method of inhibiting scale formation in acidic aqueous systems where metal ions such as Al.sup.+3 and Fe.sup.+3 are present by employing a polyepoxysuccinic acid in combination with a metal ion binding material.
    Type: Grant
    Filed: October 20, 1994
    Date of Patent: November 21, 1995
    Assignee: Betz PaperChem, Inc.
    Inventors: Davor F. Zidovec, Alexander D. Fisher, deceased
  • Composition for treating water with resin bound ionic silver
    Patent number: 5464559
    Abstract: A composition is provided for treating drinking water for disinfecting and/or removing iodide. The composition utilizes resin bound silver ions. For performing the disinfection or iodide removal with minimal release of silver ions into the water being treated, a chelating resin having iminodiacetate chelating groups is employed, and the resin is loaded with not over 0.5 mol of silver ions per mol of iminodiacetate.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: November 7, 1995
    Assignee: Kansas State University Research Foundation
    Inventors: George L. Marchin, Jack L. Lambert
  • Agents used for improving the bottom and water quality in water areas where sludge is deposited
    Patent number: 5460744
    Abstract: A method for improving the quality of bottom and water in water areas where sludge is deposited on the bottom. In a sample water area, lime, activated sludge and anaerobic sludge, diatomaceous earth or zeolite, and photosynthesis bacteria solution are spread. Before spreading, the photosynthesis bacteria solution is infiltrated into at least either one of the activated sludge and anaerobic sludge, and the diatomaceous earth or zeolite. For the above method, four kinds of the above agents are prepared in a predetermined proportion, and they are separately packed.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: October 24, 1995
    Assignee: Biochem Industrial Ltd.
    Inventors: Shigeshisa Iwai, Michiharu Kobayashi, Chihiro Uchida, Koji Kuroda, Shigeru Toda
  • Stabilization of aminomethylene phosphonate scale inhibitors against degradation by bromine and chlorine biocides
    Patent number: 5449476
    Abstract: Aminomethylene phosphonates, which give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, in aqueous systems, are degraded by the oxidizing biocides bromine and chlorine used to control microbial growth in such aqueous systems. It has been found that organic sulfonamides provide excellent protection against such degradation when they are added to the aqueous system along with the aminomethylene phosphonate scale inhibitors.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: September 12, 1995
    Assignee: Calgon Corporation
    Inventors: Ann M. Sherbondy, Daniel P. Vanderpool