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7601266 |
Method of promoting unrestricted flow of irrigation water through irrigation networks
A biofilm reducing agent (BRA) and a mineral deposit distorting agent (MDDA) are admixed to irrigation water in amounts sufficient to substantially eliminate biofilm formation in the emitters ( 14...
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7537705 |
Method for treating feedwater
A method for treating feedwater is provided. The method includes steps of introducing a treatment composition into a feedwater stream to provide a treated feedwater stream containing scale...
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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...
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7214806 |
Synthetic multiple quaternary ammonium salts
This invention pertains to novel multiple quaternary ammonium salts and their derivatives represented by the formula:
wherein each R 1 , R′ 1 , R 2 , R′ 2 , R 3 , R′ 3 , R 4 or R 5 is...
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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...
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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...
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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...
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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,...
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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...
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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...
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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,...
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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...
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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: wherein Z=—CHR 1 PO...
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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...
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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...
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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...
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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...
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6264839 |
Phosphonomethylated polyvinylamines and preparation and use thereof
Phosphonomethylated poly-vinylamines which contain as characteristic structural elements units of the formula ##STR1## where R 1 is hydrogen, C 1 -C 6 -alkyl or ##STR2## and X is hydrogen, an...
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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...
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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...
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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...
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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...
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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)...
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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.
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RE36291 |
Reaction product of nitrogen bases and phosphate esters as corrosion inhibitors
A method for inhibiting corrosion of metal surfaces in an aqueous medium, comprising incorporating into the medium a corrosion inhibitor in an amount sufficient to inhibit corrosion, the corrosion...
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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...
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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...
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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...
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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...
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5776875 |
Use of biodegradable polymers in preventing 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...
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5772913 |
Aqueous system containing a synergistic combination for scale control
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a...
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5772893 |
Ether diphosphonate scale inhibitors
The invention is a method for the prevention of scale formation on metal or other surfaces in contact with scale-forming industrial water with an effective scale-inhibiting amount of an ether...
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5709814 |
Aqueous system containing a synergistic phosphonate scale control combination
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a...
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5707529 |
Method for controlling scale in an aqueous system using a synergistic combination
A method for inhibiting the formation, deposition and adherence of scale forming salts including calcium carbonate and calcium phosphate in an aqueous system having a pH of at least 8.5 and a...
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5702634 |
Aqueous system containing a synergistic combination including polyether polyamino methylene phosphates for controlling calcium carbonate and calcium phosphate scale
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a...
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5681479 |
Phosphonic cotelomers and method of use
Phosphonic coletomers of the formula I: ##STR1## wherein X 5 is hydrogen, an alkali metal atom, an alkaline earth metal atom, or an ammonium or amine residue; and A 2 is a copolymer residue...
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5647995 |
Method for the control of calcium carbonate scale using compounds prepared from acetylenic compounds and inorganic phosphite salts and their derivatives
An improved method is disclosed for the preparation of novel alkali metal diphosphinate salts by the reaction of an acetylenic compound with an alkali metal hypophosphite in the presence of a free...
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5645756 |
Hardness suppression in urea solutions
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....
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5629385 |
Allylamine copolymers having phosphonic, carboxylic or sulfonic groups and N-oxide derivatives thereof
This invention is directed to certain novel N-functionalized polyallylamines having recurring units represented by the formula: ##STR1## wherein A, B, C and D are independently selected from the...
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5593595 |
Method for controlling scale using a synergistic phosphonate combination
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a...
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5580462 |
Controlling calcium carbonate and calcium phosphate scale in an aqueous system using a synergistic combination
An aqueous system containing scale forming salts including both calcium carbonate and calcium phosphate and characterized by high pH and high calcite concentrations which further contains a...
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5565106 |
Stabilization of polyether polyamino methylene phosphonate scale inhibitors against degradation by bromine and chlorine biocides
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,...
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5534157 |
Polyether polyamino methylene phosphonates for high pH scale control
A method for inhibiting the formation, deposition, and adherency of scale-forming salts, including calcium sulfite, in process waters. The method is particularly suited for use in pulp mill lime...
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5525257 |
Composition for water treatment containing polyaspartic acidora derivative thereof and a polcarboxylic acid and methods of using the composition
An improved composition for water treatment and for alkaline cleaning contains polyaspartic acid or a derivative thereof and a polycarboxylic acid.
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5518629 |
Methods for controlling scale formation in acqueous systems
A method of controlling scale formation and deposition and corrosion in aqueous systems is described wherein a treatment solution of a substoichiometric amount of a scale/corrosion inhibitor in...
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5490942 |
Process of inhibiting oxalate scale formation
A process of inhibiting oxalate scale formation in aqueous systems is disclosed. A preferred class of scale inhibitors is represented by polyamino hexamethylene phosphonates. These phosphonate...
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5486294 |
Method of inhibiting barium sulfate and strontium sulfate scale at low pH
Disclosed is a method of inhibiting the formation of scales such as barium and strontium sulfate in low pH aqueous system. The method involves treating the aqueous system with a scale control...
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5478476 |
N-bis(phosphonomethyl) amino and their use as scale inhibitors
Certain N-bis(phosphonomethyl) amino acids are novel compounds and are useful in preventing calcium carbonate scale.
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5470942 |
Preparation of anhydropolyamino acids
There is disclosed a process for preparing polyaspartic acid by thermal condensation of L-aspartic acid in a novel catalyst which shortens the reaction time and increases the molecular weight of...
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5462668 |
Use of steam to condensate to dilute brine stream additives
Additives are usually diluted before they are added to a geothermal brine processing stream. It has been found that one preferred diluent is the conditioned steam condensate produced after power...
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