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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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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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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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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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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...
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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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7144513 |
Water treatment method in high cycle dispensing systems for scale control
The invention relates to a method that reduces limestone scale deposit on surfaces and in heating elements, especially, for drinking water in foodservice vending and dispensing machines without...
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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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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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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...
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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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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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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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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...
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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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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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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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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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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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6063290 |
Method for controlling scale using synergistic phosphonate blends
The present invention is a process of treating aqueous systems to prevent precipitation of dissolved metal ion species, for example, Ca, Mg, Ba, Cu, Fe, Mn and Zn. This has the effect of preventing...
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6063288 |
Inhibition of silica and silicate deposition using imidazolines
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 an...
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6022516 |
Method of reducing the formation of scale in the production of soda ash from trona and nahcolite ores
The methods for decreasing scale formation in processes for the production of soda ash from trona or nahcolite ores are provided. Diphosphonic acid materials such as 1-hydroxy-ethylidene...
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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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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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5800732 |
All-in-one treatment agent for cooling water
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...
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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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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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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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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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5700368 |
Treatments to reduce aldol condensation and subsequent polymerization in caustic acid gas scrubbers
The present invention provides a number of agents that are useful to inhibit aldol condensation in caustic scrubbers. Preferred agents include, but are not necessarily limited to benzoic hydrazide,...
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5683588 |
Stabilization of catalyzed aqueous sulfite and bisulfite ion solutions
A method for stabilizing an aqueous solution containing sulfite or bisulfite ions and a water-soluble metal catalyst. The method comprises incorporating a stabilizing amount of a alpha substituted...
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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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5670055 |
Use of the linear alkylbenzene sulfonate as a biofouling control agent
The invention comprises a method for dispersing biofilms caused by the growth of slime-forming bacteria and other microorganisms in industrial process water. The method comprises adding an...
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5662803 |
Stabilizers for additives in aqueous systems containing ozone
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...
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5658465 |
Method for inhibiting the deposition of silica and silicate compounds in water systems
The present invention relates to a method for inhibiting the formation and deposition of silica and silicate compounds in water systems by the use an effective amount of a polymer or copolymer...
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5658464 |
Method of inhibiting sulfate scale in aqueous systems using poly(amino acids)
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...
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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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5616278 |
Inhibition of scale and corrosion in aqueous systems
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...
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5578246 |
Corrosion inhibiting compositions for aqueous systems
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...
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5575920 |
Method of inhibiting scale and controlling corrosion in cooling water systems
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...
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5562830 |
Calcium carbonate scale controlling method
A method of inhibiting corrosion and scale formation and deposition in aqueous systems by adding a combination of a polyepoxysuccinic acid or salts thereof and a phosphonocarboxylic acid or salts...
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5547587 |
Process for denaturing and coagulating paints
The invention is an improved process for denaturing and coagulating paint in an aqueous medium in which denatured and coagulated paint must remain in a dispersion in the aqueous medium. The aqueous...
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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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5500128 |
High calcium tolerant deposit control method
A method and composition for controlling deposition of scale and the like in waters having a high calcium ion content is disclosed. The composition comprises a combination of an alkylidene...
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