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7595000 |
Operation of evaporative cooling towers with minimal or no blowdown
A method and composition are provided for the operation of an evaporative cooling tower with minimal, or no, blowdown. In some embodiments, the method involves using sodium cation-exchanged...
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7572381 |
Scale inhibition in water systems
The present invention relates to use of compositions comprising: (a) a copolymer of an unsaturated phosphonic acid (or salt of such an acid) with an unsaturated sulphonic acid (or salt of such an...
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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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7531600 |
Water-in-oil polymer emulsion containing microparticles
A storage stable water-in-oil emulsion composition that includes 5% to 99% by weight of a water-in-oil emulsion polymer including a polymer or copolymer containing repeat units from an acrylamide...
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7390415 |
Method and compositions for preventing or reducing aluminosilicate scale in alkaline industrial processes
Materials and a method are provided whereby polymers with least 0.5 mole % of the pendant group or end group containing —Si(OR″) 3 (where R″ is H, an alkyl group, Na, K, or NH 4 ) are used...
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7285221 |
Composition for preventing of slime and method for preventing slime
A composition for preventing formation of slime which comprises a chlorine-based oxidizing agent, a sulfamic acid compound, one of an anionic polymer or a phosphonic acid compound and a process for...
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7252770 |
Multifunctional calcium carbonate and calcium phosphate scale inhibitor
The present invention is directed a multifunctional polymer capable of inhibiting both calcium carbonate and calcium phosphate scale. The multifunctional polymer contains at least one monomer unit...
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7204937 |
Metal oxides dispersant composition
This invention relates to metal oxides dispersant compositions comprising (a) certain a metal oxides dispersant, and (b) an oxime. The invention also relates to a process for dispersing metal...
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7186394 |
Retarding agents for preparing purified brine
The invention relates to a process to produce brine of improved purity wherein a salt source, contaminated with sulphate ions and alkaline (earth) metal ions, is dissolved in water in the presence...
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7179384 |
Control of cooling water system using rate of consumption of fluorescent polymer
A method to control a cooling water system based on the rate of consumption of fluorescent polymer is described and claimed. The method includes providing a cooling water system and a water...
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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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6995120 |
Scale control composition for high scaling environments
Barium sulfate and/or calcium carbonate scale inhibitor composition composed of a water-soluble polymer having incorporated phosphate functionality, the polymer being formed from at least one...
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6960321 |
Sterilization of fire sprinkler systems
New and in-use fire sprinkler systems can be sterilized by employing antimicrobial gases. The gases include steam, oxygen, and chlorine. Water added to the system after sterilization can be...
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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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6814873 |
Method of preventing or reducing aluminosilicate scale in a bayer process
Materials and a process are provided whereby polymers with the pendant group or end group containing —Si(OR″) 3 (where R″ is H, an alkyl group, Na, K, or NH 4 ) are used to control...
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6797177 |
Process for inhibiting scale and fouling on the metal surfaces exposed to an aqeuous system
This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic...
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6767470 |
Method for cleaning and maintaining water delivery systems
A sodium chlorite solution is admixed with a second solution containing an acid to make a reacted mixture. The reacted mixture is introduced into a water system, viz. a conduit in which water flows...
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6756460 |
Water-soluble copolymer and its production process and use
The present invention provides: a novel water-soluble copolymer which is excellent in performance for uses, such as detergent builders, pigment dispersants, and scale inhibitors. In addition, the...
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6723246 |
Filter cleaning method
A method of cleaning a filter clogged with flocculating materials is provided. The method comprises determining the flocculated materials clogged on the filter and adding a dispersing agent to...
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6656365 |
Process for preventing formation of scale
A process for preventing formation of scale which comprises adding, into a water system in which ozone is used for disinfection, a polymeric scale inhibitor having a high molecular weight which...
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6645384 |
Method for inhibiting scale in high-cycle aqueous systems
A composition and an improved method for treating aqueous systems to prevent the accumulation of mineral scale and corrosion which comprises adding to the aqueous system a treatment solution...
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6620328 |
Control of barium sulfate scaling
This invention relates to a method of inhibiting the growth of barium sulfate scaling by using a synergistic blend of (a) a polyphosphate with degree of polymerization between 6 and 21, and (b) a...
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6430249 |
Polymer dispersants and methods of use in a nuclear steam generator
A novel high-purity polymer dispersant and sludge conditioner added to the feedwater entering the secondary side of a nuclear steam generator for minimizing the accumulation of metal-oxide deposits...
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6416712 |
Corrosion inhibition method suitable for use in potable water
Effective corrosion inhibitors having minimal organic content, particularly suitable for use in municipal drinking water systems, are described. The corrosion inhibiting additive is a stannous salt...
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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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6235152 |
Process for treating an aqueous liquid containing forming calcium scale salts by adding a copolymer of 1,2-dihdroxy-3-butene antiscalant
The present invention is directed to an improved process for inhibiting calcium carbonate scaling in aqueous systems such as that employed in the kraft process for the production of wood pulp. Such...
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6231768 |
Rheology modification of settled solids in mineral processing
The present invention comprises a method for reducing the viscosity of the settled mud or underflow of a raked thickener thereby reducing the torque necessary to move the rake blade through the...
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6210586 |
Method of dispersion with low molecular weight structured polymers
The present invention relates to novel low molecular weight, structured polymer compositions. The invention also relates to methods for inhibiting scale formation, precipitation or deposition;...
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6210585 |
Fatty acid free latex polymer flocculants
A method of separating solids and preventing foaming in an industrial water system comprising adding to fluids in the industrial water system an effective amount of a low foaming latex polymer...
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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...
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6146495 |
Kraft process for the production of wood pulp by adding a copolymer of 1,2-dihydroxy-3-butene antiscalant
An improved process for inhibiting calcium carbonate scaling in aqueous systems such as that employed in the kraft process for the production of wood pulp. Such an improved process is achieved by...
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6114294 |
Copolymeric scale inhibitors for (Poly)phosphate scale control
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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6099755 |
Method and composition 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...
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6086771 |
Water continuous emulsion polymers for improving scale control in the bayer process
The present invention is directed to improvements in the Bayer mining process, used for the recovery of alumina from bauxite ore. Water-continuous emulsion polymers are advantageously used to...
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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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6054054 |
Chemical for the prevention of attachment of microorganisms to surfaces
The inventors have discovered a new method of treating paper machine white water aqueous systems and surfaces in the paper machine white water aqueous systems that prevents or inhibits the adhesion...
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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...
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5993666 |
Maleic acid based copolymer, and its production process and use
A maleic acid-based copolymer is provided which has a weight-average molecular weight of 1,000 to 100,000, a calcium ion-capturability of 300 mgCaCO 3 /g or higher calculated as calcium carbonate,...
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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...
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5961837 |
Process for treatment of industrial waste
Water to be utilized is reacted with soda ash and lime to produce a less corrosive and foulant water. Reaction sludges are fed to a desulfurization unit, where SO x , NO x and CO 2 abatement...
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5948268 |
Method for preventing scale formation and corrosion in circulating water
An agent for water treatment comprises a water-soluble polymer obtained by polymerizing a monomer component containing a water-soluble monomer capable of dissolving in water of 50° C. in the...
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5906971 |
Process for removing silicate scale
The present invention relates to a composition and process for stabilizing inorganic salts. The composition generally includes a carboxylated polymer that has been neutralized with an alphahydroxy...
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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...
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5866042 |
Methods and compositions for inhibiting corrosion
The present invention provides for methods and compositions for inhibiting the corrosion of iron-containing metals in contact with aqueous systems. The present invention further provides for...
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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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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...
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5853593 |
Filtration method for metal working waste water
A method is provided for filtering waste water containing metallic cations having valences in whole integers of at least two in concentrations greater than about one part to about one million parts...
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5788866 |
Copolymers formed from polymerization of N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine and their utility as calcium carbonate scale inhibitors
The invention is a water-soluble N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine containing copolymer, wherein said copolymer is formed from the polymerization of an...
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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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