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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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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...
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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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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.
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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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6589461 |
Method of making a treatment chemical cartridge
A method of producing a polyphosphate, orthophosphate, phosphonate or the like chemical treatment cake is disclosed. Conventional commercially available treatment material is obtained in powder...
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6485641 |
Water filter cartridge having a proportional flow feeder
More specifically, the present invention features an improved feeder tube for a water treatment cartridge that provides treatment by a solid compound for a slipstream of untreated water flowing...
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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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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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6387272 |
Process for utilizing liquid manure material
A process for utilizing the material of ammonium-containing effluent which contains further soluble constituents and, possible additional solids, comprising: a) optionally separating off the...
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6270664 |
Water treatment system
An apparatus for treatment of water comprising a first compartment containing a filtration unit for receiving untreated water, a second compartment containing polyphosphates, a housing containing...
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6238568 |
Hydrothermal processing with phosphate additive
A system (10) and method for hydrothermal treatment of a feed material (11) includes a reaction chamber (14) in a reactor (12). Importantly, an additive (16) is added with the feed material (11) to...
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6231767 |
Treatment of phosphatic wastes
A process for treating thickened phosphatic clay suspensions, waste clay and phosphogypsum produced in the processing of phosphate ore by water beneficiation and chemical processing, the thickened...
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6162391 |
Scale inhibition agent and method for using same
An agent for preventing scale formation and a method for preventing scale formation include a polymer which has at least 50% of N-vinyl formamide units or N-vinyl acetamide units and a phosphorus...
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6117332 |
Method for using a center core cartridge feeder insert
A feeder insert apparatus for a tubular water filtration cartridge utilized in household point of use water filtration systems. The feeder insert allows a chemical to be fed into a incoming water...
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6010869 |
Method to collect and recover microorganisms from environmental samples
Presented herein is an improved method to collect and recover microorganisms from environmental samples. The method of this invention comprises the steps of (a) obtaining a sample for testing and,...
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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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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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5795484 |
Method and apparatus for dewatering
An ultra-fine coal particle fraction forms a coal product with particles that are dilatant due to the mechanical stripping of the clay contaminates from the coal surface and the subdividing of the...
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5792360 |
Water treatment system comprising water-soluble glass
A water treatment system for submersion in a body of water to be treated comprises a water-soluble glass treatment agent and a water-insoluble retaining means for the water-soluble glass treatment...
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5792313 |
Method for evaporating process wastewater
In the evaporation of process wastewater comprising a mixture of different types of wastewater, problems arise due to the formation of reaction products, so-called incrustations, which are...
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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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5755971 |
Inhibition of calcium oxalate scale in aqueous based solutions
A method of inhibiting the precipitation and deposition of calcium oxalate scale in an aqueous system is disclosed, in which an effective amount of a combination of a high molecular weight...
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5730881 |
Method for treating oversprayed solvent-based paints
An improved method for treating over-sprayed, solvent-based paints which comprises adding an effective amount of a chelating agent to the circulating water of a paint spray booth, thereby improving...
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5683587 |
Process for treating industrial wastes
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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5672278 |
Method and system for suppression of foam of waste streams
A method and a system is disclosed for the suppression of foams during the processing of streams containing waste materials. An additive is introduced into a waste stream and the waste stream is...
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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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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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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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5552040 |
Method of increasing service life of oil and a filter for use therewith
A method of increasing service life of an oil comprises placing a quantity of oil within a circuit, and placing a filter in the circuit, the filter having surfaces including interstices which...
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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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5492628 |
Process for reducing sludge accumulation in the hot water extraction process for oil sands
A dispersant, such as sodium silicate, is added to the process water of the hot water extraction process which recovers bitumen from oil sands. The dispersant disperses the ultrafine (less than 300...
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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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5468393 |
Methods of controlling scale formation in the presence of metal ions in aqueous systems
A method of inhibiting scale formation in acidic aqueous systems where metal ions such as Al +3 and Fe +3 are present by employing a polyepoxysuccinic acid in combination with a metal ion binding...
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5453203 |
Process and apparatus for purifying low polluted water
Disclosed is a process and apparatus for purifying a low polluted water containing concurrently or selectively inadequate matters including heavy metals such as iron contents and manganese, and...
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5422010 |
Method for inhibiting silica and silicate deposition
A method and composition for inhibiting silica and silicate deposition on metal surfaces in contact with aqueous systems is disclosed.
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5419836 |
Chemical feed system
A chemical feed system for use in industrial fluid systems is disclosed. The system comprises a fluid source, containers for storing additives, pumps for proportionally dispensing the additives,...
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5403493 |
Noncorrosive scale inhibitor additive in geothermal wells
An aqueous scale inhibitor product is corrosive to the elongated feed lines of a geothermal well due to the length of such feed lines, extended residence time of the product therein, and/or the...
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5401419 |
Conservation of water in operating evaporative coolers
The present invention relates to operation of residential or commercial evaporative coolers, more specifically, its subject matter is conservation of water needed to cool down ambient air in their...
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5376331 |
Method and composition for inhibiting general and pitting corrosion in cooling tower water
A method of inhibiting the pitting corrosion rate of carbon steel in a cooling tower system comprising adding to a cooling tower water an effective amount of a corrosion inhibiting composition...
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5308498 |
Hydroxamic acid containing polymers used as corrosion inhibitors
A method of inhibiting corrosion of iron and steel alloys in contact with industrial waters is claimed. The method comprises treating said waters with an effective corrosion inhibiting amount of a...
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5302291 |
Method for improving the dispersibility of solvent-based paints in aqueous systems
A method for improving the dispersibility of over-sprayed, solvent-based paints in aqueous systems which comprises adding an effective amount of a chelating agent to an aqueous system containing...
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5282976 |
Terpolymer useful as a scale inhibitor
A novel terpolymer particularly useful as a scale inhibitor for aqueous systems is provided. The terpolymer preferably is derived from monomers of acrylic or methacrylic acid, vinyl acetate and/or...
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5271847 |
Polymers for the treatment of boiler water
A method for controlling the deposition of silica on the structural surfaces of steam generating systems comprising the use of a water soluble polymer having the structure ##STR1## wherein E is the...
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5259985 |
Calcium carbonate scale inhibitor having organophosphonate, water soluble acrylic or maleic copolymer and citric acid
A scale inhibitor for a calcium-type scale, which includes ingredients of: (a) an organophosphonic acid or its salt having an scale inhibiting activity; (b) a water-soluble acrylic acid-type...
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5254264 |
Method of dispensing a substance into a flow of water
A method of dispensing scaling inhibitors into a flow of low pressure water by modifying the use of available air lubricators. Mechanical modifications to an air lubricator results in an apparatus...
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5232629 |
Synergistic combination of sodium silicate and ortho-phosphate for controlling carbon steel corrosion
An orthophosphate salt and sodium silicate, when used in a 3:1 ratio by weight, and in a concentration of 0.1 to 100 mg/L, are found to have a synergistic effect in controlling the corrosion of...
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5200106 |
Compositions comprising transition metals for treating and monitoring liquid systems
Methods for utilizing transition metals as tracers in aqueous liquid systems are provided by this invention. Transition metals with low background levels in system waters are identified as...
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5192447 |
Use of molybdate as a cooling water corrosion inhibitor at higher temperatures
A corrosion inhibitor treatment composition for cooling water systems at elevated temperatures in which no chromate is used is disclosed, comprising a combination of a localized corrosion inhibitor...
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5183573 |
Multipurpose scale preventer/remover
A process for preventing or removing calcium and rust scale deposits from surfaces which are in contact with aqueous systems comprising adding to the aqueous system...
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