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| Number | Title | Issue Date |
| 7404902 | Method for treating water A composition for treating water contained in enclosures, such as swimming pools, spas, whirlpool tubs and cooling towers, which includes at least one boron compound, cyanuric acid, at least one mineral remover and at least one clarifier is provided. A composition a... | 07/29/2008 |
| 7300542 | Method for inhibiting calcium salt scale Compositions and method of improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or phosphonate blends is admixed with the black liquor composition recovered f... | 11/27/2007 |
| 7270796 | Ammonium/ammonia removal from a stream In one embodiment, an ammonium removal method can comprise: removing a multivalent cation from a stream comprising ammonium to form a treated stream; converting the ammonium in the stream to ammonia by increasing the pH of the stream; and separating the ammonia from... | 09/18/2007 |
| 7263934 | Methods for generating energy using agricultural biofuel A process comprising, providing an agricultural biofuel to a fluidized bed reactor and combusting the agricultural biofuel to produce heat and/or steam is disclosed. In one embodiment, the agricultural biofuel is selected from the group consisting of agricultural cr... | 09/04/2007 |
| 7252769 | Use of cerium salts to inhibit manganese deposition in water systems Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promo... | 08/07/2007 |
| 7214806 | Synthetic multiple quaternary ammonium salts This invention pertains to novel multiple quaternary ammonium salts and their derivatives represented by the formula: wherein each R1, R′1, R2, R′2, R3, ... | 05/08/2007 |
| 7185699 | Water compatible hydraulic fluids A composition for use in an oil chamber of a tool includes a hydraulic oil; and a surfactant, wherein the surfactant is present at an amount sufficient to form micelles in the hydraulic oil. The composition may further include an amphiphilic copolymer. A method incl... | 03/06/2007 |
| 7182872 | Struvite crystallization The present invention provides a method and apparatus for removing phosphorus from phosphorus containing waste. In one embodiment, the method is preferably carried out by contacting the phosphorus containing waste with a non-cellular membrane and precipitating phosp... | 02/27/2007 |
| 7179403 | Anti-corrosion solutions for air dehumidification systems Anti-corrosion solutions useful for air dehumidification processes are disclosed. Phosphonate corrosion inhibiting agents or mixtures thereof can be added to halide solutions of alkali metals, alkaline earth metals, or mixtures thereof, to minimize corrosion of the ... | 02/20/2007 |
| 7172677 | Method for inhibiting calcium salt scale Compositions and method for improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or phosphonate blends is admixed with the aqueous digester composition in a c... | 02/06/2007 |
| 7159655 | Method for inhibiting or controlling inorganic scale formations A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal of zinc sulfide and iron sulfide scales formed when zinc bromide brine... | 01/09/2007 |
| 7141174 | Modified amine for boiler water treatment The present invention provides a method of treating boiler and condensate water by the addition of an effective amount of a hydroxyamine-acid ester treatment reagent or an all-in-one treatment composition comprising a hydroxyamine-acid ester. Modification of a hydro... | 11/28/2006 |
| 7115201 | Method of treating mine drainage A method of treating mine drainage water including the step of adding a scale control agent to the mine drainage water and, optionally, adding an oxidizing agent to the mine drainage water and/or precipitating and settling the metals in their hydroxide form from the... | 10/03/2006 |
| 7097739 | Method for the production of improved pulp Compositions and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected phosphonate or carboxylate compound or mixtures thereof is admixed with... | 08/29/2006 |
| 7081212 | Solid free-flowing phosphonate composition Solid free-flowing compositions of a magnesium salt of bis(hexamethylene)triamino penta(methylenephosphonic) acid are disclosed. The compositions exhibit desirable scale inhibitor properties and can be used in water treatment. In addition, a method of scale control ... | 07/25/2006 |
| 7077976 | Phosphonamide and phosphonamide blend compositions to treat water The invention is a water treatment composition comprising at least one phosphonamide and blends thereof and a method to treat water. As phosphonamides are generally odorless, and typically solids, phosphonamide and phosphonamide blend compositions are generally odor... | 07/18/2006 |
| 7001531 | Sustained release coolant additive composition A coolant additive composition comprising a sustained release component and an additive component, the additive component is effective to provide at least one benefit to a coolant when released into the coolant, the sustained release component includes a polymeric m... | 02/21/2006 |
| 6998049 | Method for preventing the formation of biological films The invention relates to a method for improving the performance of filtration devices by adding P- and/or N-containing compounds to the medium to be filtered. ... | 02/14/2006 |
| 6932909 | Method of treating mine drainage A method of treating mine drainage water including the step of adding a scale control agent to the mine drainage water and, optionally, adding an oxidizing agent to the mine drainage water and/or precipitating and settling the metals in their hydroxide form from the... | 08/23/2005 |
| 6926836 | Treatment of iron sulphide deposits Treating a water system containing or in contact with a metal sulphide scale to inhibit, prevent, reduce, dissolve or disperse iron sulphide deposits. A solution of tris(hydroxyorgano)phosphines (THP) and tetrakis(hydroxyorgano)phosphonium salts (THP+ sal... | 08/09/2005 |
| 6846419 | Phosphonamide and phosphonamide blend compositions and method to treat water The invention is a water treatment composition comprising at least one phosphonamide and blends thereof and a method to treat water. As phosphonamides are generally odorless, and typically solids, phosphonamide and phosphonamide blend compositions are generally odor... | 01/25/2005 |
| 6840989 | Corrosion inhibitor for bathing water containing sodium chloride and magnesium sulfate The present invention relates to a corrosion inhibitor for bathing waters which contain chlorides and sulfates, in particular sodium chloride and magnesium sulfate, that reduces the corrosion effect of such bathing water on metallic materials, in particular steels (... | 01/11/2005 |
| 6797197 | Modified amine for boiler water treatment The present invention provides a method of treating boiler and condensate water by the addition of an effective amount of a hydroxyamine-acid ester treatment reagent or an all-in-one treatment composition comprising a hydroxyamine-acid ester. Modification of a hydro... | 09/28/2004 |
| 6527983 | Method for inhibiting scale formation A method for inhibiting the formation of scale in waters having a high barium content and low pH comprises the addition of an aqueous solution of a phosphonate of formula: ##STR1## wherein Z=--CHR1 PO3 R2 R=H, CH3 | 03/04/2003 |
| 6464900 | Scale corrosion inhibiting composition This invention relates to corrosion inhibiting compositions for aqueous systems comprising (a) polyaspartic acid or salts therefore, and (b) a water soluble phosphonated oligomer. The compositions are effective corrosion inhibitors, but are also advantage... | 10/15/2002 |
| 6395185 | Scale inhibitors The invention relates to the inhibition of tripolyphosphate and pyrophosphate scales in aqueous systems involving adding to said aqueous system at least one copolymer comprising the following monomers in polymerized form: (I) 50-80% by weight of one or mo... | 05/28/2002 |
| 6391207 | Treatment of scale A method for reducing or preventing the formation of scale in a municipal or industrial waste water treatment facility comprising introducing an antiscalent composition which comprises: A) A water soluble polymer of molecular weight below 20,000 and containing... | 05/21/2002 |
| 6337047 | Process for dispersing iron oxide in steam generating boilers This invention relates to a process for dispersing corrosion products, specifically iron oxide, in steam generating boilers. Improved dispersion is achieved by adding a dispersant to a feedpoint of the steam generating boiler where the composition compris... | 01/08/2002 |
| 6264839 | Phosphonomethylated polyvinylamines and preparation and use thereof Phosphonomethylated poly-vinylamines which contain as characteristic structural elements units of the formula ##STR1## where R1 is hydrogen, C1 -C6 -alkyl or ##STR2## and X is hydrogen, an alkali metal, ammonium or one equ... | 07/24/2001 |
| 6207079 | Scale and/or corrosion inhibiting composition This invention relates to a scale inhibiting composition for aqueous systems comprising (a) polyaspartic acid, and (b) a water soluble phosphonated oligomer. The compositions are effective scale and/or corrosion inhibitors, but are also advantageous from ... | 03/27/2001 |
| 6187195 | Inhibition and delay of deposit formation in membrane processes The invention relates to the use of polyaspartic acids and their mixtures with surfactants and emulsifiers for inhibiting or delaying deposit formation by sparingly soluble organic and inorganic components in the feed of a process that uses a membrane.... | 02/13/2001 |
| 6177047 | Water-treatment composition and method of use The invention herein relates to water-treatment technology, namely compositions comprising a phosphonic acid, a zinc salt and a metal salt. A preferred metal salt is aluminum tri-chloride whereas amino tris methylene phosphonic acid is a preferred phospho... | 01/23/2001 |
| 6083403 | Stabilized substituted aminomethane-1, 1-diphosphonic acid n-oxides and use thereof in preventing scale and corrosion This invention relates to novel organic phosphonate compounds which can be used as water treatment agents. More specifically, this invention relates to 1,1 -diphosphonic acid N-oxides and water-soluble salts thereof for control of corrosion and scale in a... | 07/04/2000 |
| 6077440 | Inhibition of silica and silicate deposition A method of controlling the deposition of silica-containing scales and their adhesion to surfaces in contact with an aqueous system is disclosed which comprises adding to the aqueous system a synergistic combination of: (a) diethylenetriamine penta methylene p... | 06/20/2000 |
| 6066260 | Means of and process for regulating the hardness and pH value of water in freshwater aquaria In the present state of art, use is made of aqueous mixtures of sodium phosphates, preferably mixtures of pentasodium triphosphate (for softening) and sodium dihydrogen phosphate (to reduce the pH) of hard and slightly alkaline water in aquaria to values ... | 05/23/2000 |
| 6036740 | Concentrated gypsum slurries for use in drip irrigation Concentrated aqueous gypsum slurries containing small amounts of water soluble phosphonates are non-clogging when used in drip irrigation systems.... | 03/14/2000 |
| 5866032 | Composition for controlling scale formation in aqueous systems A composition for of controlling scale formation and deposition and corrosion in aqueous systems is described wherein a treatment solution of a substoichiometric amount of a composition comprising a scale/corrosion inhibitor in combination with a substitu... | 02/02/1999 |
| 5858244 | Use of biodegradable polymers in prevention scale build-up 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 e... | 01/12/1999 |
| 5788857 | Hydroxyimino alkylene phosphonic acids for corrosion and scale inhibition in aqueous systems 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 als... | 08/04/1998 |
| 5783524 | Use of glycine-N,N-diacetic acid derivatives as complexing agents for alkaline earth metal and heavy metal ions in the production and transport of petroleum and natural gas Glycine-N,N-diacetic acid derivatives and their alkali metal, akaline earth metal, ammonium and substituted ammonium salts, used as completing agents for alkaline earth metal and heavy metal ions in the production and transport of petroleum and natural ga... | 07/21/1998 |
