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| Number | Title | Issue Date |
| 8025840 | Compositions and methods for inhibiting corrosion in aqueous media Methods and compositions are provided for corrosion inhibition treatment of aqueous systems such as cooling water systems. The methods include conjoint use of a polyvalent metal ion, such as Al or Mn and a corrosion inhibitor/deposit control agent (DCA) to the water... | 09/27/2011 |
| 8021607 | Methods for inhibiting corrosion in aqueous media Methods are provided to inhibit corrosion of metals in contact with aqueous systems such as cooling water systems. In accordance with the methods, a hydroxyacid compound and orthophosphates are used to treat the system. Additionally, an adjuvant including poly(epoxy... | 09/20/2011 |
| 7407623 | Steam condensate corrosion inhibitor compositions and methods Lecithin and 2-bromo-2-nitropropane-1,3 diol (BNPD) are used to inhibit corrosion in boiler steam condensate systems. Aqueous steam condensate corrosion inhibiting compositions of these components are also disclosed. BNPD is also used as a preservative in lecithin c... | 08/05/2008 |
| 7208118 | Process for the solvent-free preparation of ethercarboxylic acids having a low residual salt content The invention provides a process for preparing compounds of the formula (1) where A is C2- to C4-alkylene, B is C1- to C4-alkylene, n is a number from 1 to 100, and R i... | 04/24/2007 |
| 7205438 | Solvent recovery blends from diene production A diene production stream comprising a solvent recovery blend from diene production comprising one or more fouling agent, one or more extractive distillation solvent, and from about 1 ppm to about 1000 ppm of N,N-disubstituted amide. ... | 04/17/2007 |
| 7182839 | Preventing deposition of fouling agents onto equipment Methods and compositions effective to prevent deposition of fouling agents, preferably polymerization precursors, on handling equipment, particularly during solvent recovery. ... | 02/27/2007 |
| 7157008 | Apparatus and process for water conditioning A conditioning process and equipment are provided for removing hardness from water circulated in a system, such as an evaporative cooling system. A sidestream from such system is routed to a reaction chamber and back to the system. A conditioner is added to the side... | 01/02/2007 |
| 7090780 | Bactericide for use in water treatment, method for water treatment and apparatus for water treatment A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water t... | 08/15/2006 |
| 6861032 | Oxygen scavenger and boiler water treatment chemical A boiler water treatment chemical includes a heterocyclic compound with N-substituted amino group, or the salt thereof, and alkaline agent and/or water soluble polymer. ... | 03/01/2005 |
| 6846452 | Scale inhibitor for an aqueous system This invention relates to a composition and a method for inhibiting the formation of scale, particularly complex scale, in an aqueous system where more than one type of scale is present. The scale typically present in the aqueous system includes silica, silicates, a... | 01/25/2005 |
| 6814930 | Galvanized metal corrosion inhibitor A white rust inhibiting composition and method of inhibiting white rust for evaporative water coolers are disclosed. The composition includes, in combination, a blend of one or more organophosphorus compounds and one or more tannin compounds. ... | 11/09/2004 |
| 6811747 | Corrosion inhibitor The present invention relates to water treatment chemical formulations, and more particularly to chemical formulations used to treat water containing halogens as a sanitizing agent. The water treatment chemical formulations contain cyanuric acid and an alkali metal ... | 11/02/2004 |
| 6680001 | Protective composition for pressure washer and applicator A composition for lubricating, preventing mineral deposit buildup, and expelling any standing water from the internal parts of a pressure washer, as well as a pressurized container for applying such composition across the internal parts of the pressure wa... | 01/20/2004 |
| 6583091 | Method for inhibiting corrosion using 4-sulfophthalic acid The present invention relates to a method for inhibiting high temperature corrosion of corrosion prone metal surfaces by organic acid-containing petroleum streams by providing an effective corrosion-inhibiting amount of 4-sulfophthalic acid, typically up ... | 06/24/2003 |
| 6551553 | Disinfection method A process is provided for disinfecting articles at temperatures below 5° C. with an aqueous alcoholic salt solution. The process provides a fast reduction of microorganisms at low temperatures with a wide degree of efficacy.... | 04/22/2003 |
| 6475431 | Corrosion inhibitors with low environmental toxicity A low toxic, biodegradable, water soluble and dispersant series of corrosion inhibitors are described. The method of inhibiting corrosion in aqueous medium by incorporating the inhibitor in PPM is provided. The corrosion inhibitor compromises an acrylic a... | 11/05/2002 |
| 6468470 | Galvanized metal corrosion inhibitor A white rust inhibiting composition and method of inhibiting white rust for evaporative water coolers are disclosed. The composition includes, in combination, a blend of one or more organophosphorus compounds, one or more tannin compounds, and one or more... | 10/22/2002 |
| 6458320 | Galvanized metal corrosion inhibitor This invention relates to a galvanized metal, typically steel, corrosion inhibitor concentrate comprising (a) an amine salt of a fatty acid or an amine salt of a derivative of a fatty acid, (b) preferably a salt of a non polymeric aromatic acid, and (c) p... | 10/01/2002 |
| 6447717 | Composition and method for inhibition of metal corrosion Carbon dioxide induced corrosion of ferrous metals in aqueous systems is inhibited by treatment of the aqueous system with corrosion inhibiting amino thiol and amino disulfide compounds. Particularly effective inhibitors are the natural amino acids cystei... | 09/10/2002 |
| 6436344 | Method of inactivating pathogens The present invention introduces a class of compounds, 2-substituted carbonyl compounds, that are useful as disinfecting agents, and particularly useful in methods for the disinfection of biological fluids. Members of the class of compounds have been foun... | 08/20/2002 |
| 6419850 | System and composition for decontaminating fluids An apparatus and composition of matter for treating tap or distilled water prior to use in irrigation during surgical and medical operations.... | 07/16/2002 |
| 6403028 | All-organic corrosion inhibitor composition and uses thereof This invention relates to an all-organic corrosion inhibiting composition comprising (a) 6,6,6-(1,3,5-triazine-2,4,6-triyltriimino) tris hexanoic acid; and (b) a water-soluble phosphonated oligomer salt. The invention also relates to a process for inhibit... | 06/11/2002 |
| 6395225 | Sulphydryl acid and imidazoline salts as inhibitors of carbon corrosion of iron and ferrous metals The invention concerns inhibitor compositions based on fatty sulphydryl acid and poly(ethyleneamino)imidazoline salts for considerably reducing the corrosive effect of carbon brine on iron and ferrous metals. These compositions are as efficient when the c... | 05/28/2002 |
| 6391256 | Dissolved oxygen removal method using activated carbon fiber and apparatus thereof A dissolved oxygen removal method using an activated carbon fiber catalyst thereof which includes the steps of a reducing agent injection step for injecting a reducing agent into the water, a reactor entrance dissolved oxygen measuring step for measuring ... | 05/21/2002 |
| 6391257 | Antifreeze compositions comprising carboxylic acid and cyclohexenoic acid This invention relates to antifreeze compositions comprising a mixture of organic acid corrosion inhibitors. The compositions comprise (a) from about 90% to about 99.89% by weight of a liquid alcohol which functions as a freezing point depressant, or mixt... | 05/21/2002 |
| 6277302 | Inhibition of metal corrosion A composition and method is disclosed for inhibiting the corrosion of metals in contact with an aqueous system capable of corroding the metal. The inventive composition contains a substantially water-soluble polymer of an acidic amino acid and at least on... | 08/21/2001 |
| 6183649 | Method for treating water circulating systems Water-circulating systems are treated with an aqueous, alkaline composition comprising I) an organo-phosphorus chelating agent, II) an acrylate homopolymer, III) a salt of an acrylic copolymer, a portion of the repeating units of which contain sulfonate groups... | 02/06/2001 |
| 6143243 | Method of inhibiting cavitation-erosion corrosion of aluminum surfaces using carboxylic acid based compositions comprising polymerizable-acid graft polymers This invention relates to a method of inhibiting the cavitation-erosion corrosion of aluminum surfaces. The method comprises the step of contacting the aluminum surface with a formulation comprising a corrosion inhibitor composition comprising one or more... | 11/07/2000 |
| 6071436 | Corrosion inhibitors for cement compositions Compositions and methods relating to cementitious compositions are provided. The addition of an amidoamine that is the reaction product of polyalkylenepolyamines and short-chain alkanedioic acids or reactive derivatives thereof to cementitious composition... | 06/06/2000 |
| 6063334 | Sulfur based corrosion inhibitor The present disclosure is concerned with inhibiting corrosion in metal, usually steel, equipment which is exposed to oil field production flow including gases, oil, water, and sand. It is injected into the aqueous stream and carried with it to contact and... | 05/16/2000 |
| 6022401 | Biodegradable modified polyaspartic polymers for corrosion and scale control Several copolymers of aspartic acid and another monomer provide effective mild steel corrosion inhibitors and scale formation inhibitors under oil field conditions. The copolymers are polymers of modified polyaspartic acid mer units and polyaspartic acid ... | 02/08/2000 |
| 6001264 | Water-treating agent and method for treating water 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 aci... | 12/14/1999 |
| 5989440 | Method of using oxygen scavenger and removing oxygen from water An oxygen scavenger characterized in that the effective component thereof consists of a heterocyclic compound with N--N bond in a ring thereof An oxygen scavenger characterized in that the effective component thereof consists of a heterocyclic compound wi... | 11/23/1999 |
| 5985152 | Method of preventing corrosion in a water system Ca ion is removed by a cation exchange resin and silica and corrosive ions are removed by an anion exchange resin. Even after the anion exchange resin reaches the silica break through point or after the cation exchange resin reaches the Ca ion break throu... | 11/16/1999 |
| 5976414 | Non-Phosphorus corrosion inhibitor program for air washer system The prevention of corrosion on the surfaces of airwasher systems and particularly systems containing low levels of hardness is controlled utilizing a corrosion inhibiting amount of a composition including an alkali metal silicate, a hydroxycarboxylic acid... | 11/02/1999 |
| 5948267 | Composition and method for inhibiting chloride-Induced corrosion and limescale formation on ferrous metals and alloys 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 c... | 09/07/1999 |
| 5891364 | Corrosion inhibitors for cement compositions Compositions and methods relating to cementitious compositions are provided. The addition of an amidoamine that is the reaction product of polyalkylenepolyamines and short-chain alkanedioic acids or reactive derivatives thereof to cementitious composition... | 04/06/1999 |
| 5871691 | Inhibition of corrosion in aqueous systems A method and compounds for inhibiting and controlling corrosion is disclosed. The method is particularly effective at inhibiting or preventing corrosion of ferrous-based metals in contact with aqueous systems such as cooling water systems. The method comp... | 02/16/1999 |
| 5866013 | Method for inhibiting scale and controlling corrosion in cooling water systems A method and composition for simultaneously controlling the deposition of scale and the formation of corrosion in a cooling water system comprising adding to the system a combination of (a) a water soluble copolymer having the structure: ##STR1## ... | 02/02/1999 |
| 5858798 | Method and apparatus for detecting amines and ammonia by fluorescence Primary amines, ammonia, or mixtures thereof can be detected using a reagent comprising from about 650 ppm to about 25 percent by weight of phthalic dicarboxyaldehyde; from about 74 to about 99.88 percent by weight of an alkali metal borate; and, from abo... | 01/12/1999 |
