| Patents for C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632) |
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| 12/09/1997 | US5695644 Fluid treatment device and method |
| 12/03/1997 | CN2269393Y High frequency scale-proof and scale-removing water treating device |
| 12/03/1997 | CN2269392Y 多功能电子水处理器 Multifunction electronic water processor |
| 12/03/1997 | CN1166459A Direct use method of waste water as circular water |
| 11/27/1997 | WO1997044369A1 Carboxylated polymers, process for the production of the same, and gels thereof |
| 11/20/1997 | WO1997043221A1 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant |
| 11/20/1997 | CA2249006A1 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant |
| 11/19/1997 | EP0807695A1 A non-phosphorus corrosion inhibitor for industrial cooling water systems and airwasher systems |
| 11/19/1997 | EP0807635A1 Water treatment compositions |
| 11/18/1997 | US5688515 Tablets for disinfecting recirculated water systems |
| 11/15/1997 | CA2205144A1 Water treatment compositions |
| 11/13/1997 | DE19620310A1 Verfahren zum Behandeln von Waschwasser aus der Gaswäsche einer Eisenerzreduktionsanlage A method of treating wash water from the gas scrubbing an iron ore reduction plant |
| 11/11/1997 | US5685918 Potassium hydroxide, chelate compound, sodium glucoheptonate synergist |
| 11/11/1997 | CA1339536C Telomeric compound |
| 11/06/1997 | WO1997041075A1 Use of hydroxamated polymers to alter bayer process scale |
| 11/06/1997 | WO1997041065A1 Use of hydroxamated polymers to alter bayer process scale |
| 11/05/1997 | CN2266594Y Circulating water chemicals-filling and pullation discharging two-purpose apparatus |
| 11/04/1997 | US5683588 Stabilization of catalyzed aqueous sulfite and bisulfite ion solutions |
| 11/04/1997 | US5683587 Producing a sludge of calcium carbonate and magnesium hydroxide by reaction of soda ash with lime in water feeding waste gases containing polllutants for scrubbing, separation and injection into reaction chamber |
| 10/30/1997 | WO1997039986A1 Aqueous composition with detergent for rust and stain removal |
| 10/29/1997 | EP0694027B1 Apparatus and method for continuously decarbonating and deliming untreated ph-neutral calcareous water |
| 10/29/1997 | CN1036285C Water-treating agent for pure water boiler and water treating method |
| 10/28/1997 | US5681479 Phosphonic cotelomers and method of use |
| 10/28/1997 | US5681454 Liquid processing plant |
| 10/23/1997 | WO1997039078A1 Use of aspartic acid-containing polymers in cooling circuits with added biocides |
| 10/23/1997 | CA2252044A1 Use of aspartic acid-containing polymers in cooling circuits with added biocides |
| 10/21/1997 | US5679761 For inhibiting salt precipitation in aqueous systems; builders for detergents |
| 10/16/1997 | DE19614791A1 Apparatus for descaling water |
| 10/16/1997 | DE19614565A1 Verwendung von Asparaginsäure-haltigen Polymeren in mit Bioziden versetzten Kühlkreisläufen Use of aspartic acid-containing polymers mixed with biocides cooling circuits |
| 10/15/1997 | EP0801032A1 Stabilizers for additives in aqueous systems containing ozone |
| 10/15/1997 | EP0800622A1 Compressor installation |
| 10/15/1997 | CN1162246A Ionene polymers containing biologically-active anions |
| 10/14/1997 | US5677271 Acidic aqueous mixtures containing alkyl sulfonic acids and sulfamic acid |
| 10/14/1997 | CA2022385C Formed organosiloxane-amine copolycondensates, process of producing same and their use (ii) |
| 10/09/1997 | WO1997036831A1 A method for inhibiting the deposition of silica and silicate compounds in water systems |
| 10/08/1997 | EP0799162A1 Reversible flow supercritical reactor and method for operating same |
| 10/08/1997 | CN2264181Y Driving interchange water softening device |
| 10/01/1997 | CN1160847A Organic anti-scale corrosion inhibitor and its compounding process |
| 10/01/1997 | CN1160684A Inorganic antiscale preservative for low-pressure boiler and its compounding process |
| 09/30/1997 | US5672578 Aqueous mixture of maleic acid and amine-containing cationic surfactant having acidic ph |
| 09/30/1997 | US5672279 Solubilizing calcium carbonate |
| 09/16/1997 | US5667698 Reversible flow supercritical reactor and method for operating same |
| 09/16/1997 | US5667677 Method and apparatus for treating fluid with radio frequency signals |
| 09/09/1997 | US5665242 Inhibition of silica precipitation |
| 09/03/1997 | EP0792998A1 Method for metal sulfate scale control in harsh oilfield conditions |
| 09/02/1997 | US5662940 Biocidal methods and compositions for recirculating water systems |
| 09/02/1997 | US5662803 Bactericides in water systems, antideposit agents and water soluble compounds |
| 09/02/1997 | CA1339404C Stabilization of iron in aqueous systems |
| 09/01/1997 | CA2198841A1 Method for metal sulfate scale control in harsh oilfield conditions |
| 08/28/1997 | WO1997030943A1 Water softening apparatus with microprocessor control |
| 08/26/1997 | US5660874 Forming protective scale by adding metal bicarbonate to react with calcium ions, monitoring |
| 08/20/1997 | EP0790296A1 Limescale removal compositions |
| 08/20/1997 | EP0789595A1 Synergistic biocidal combinations |
| 08/20/1997 | EP0767806A4 Soluble, crosslinked polyaspartates |
| 08/20/1997 | CN2260082Y High energy internal polymerizing type equipment for treating water in alternative magnetic field |
| 08/19/1997 | US5658993 Water-soluble or water-dispersible graft copolymers, the preparation thereof and the use thereof |
| 08/19/1997 | US5658465 Method for inhibiting the deposition of silica and silicate compounds in water systems |
| 08/19/1997 | US5658464 Method of inhibiting sulfate scale in aqueous systems using poly(amino acids) |
| 08/13/1997 | CN2259398Y Fully-automatic electronic cleaning apparatus |
| 08/12/1997 | US5656646 Mixtures of polymers of monoethylenically unsaturated dicarboxylic acids and polymers of ethylenically unsaturated monocarboxylic acids and/or polyaminocarboxylic acids and their use |
| 08/12/1997 | US5656172 Using sulforous or sulfuric acid |
| 08/07/1997 | WO1997028230A1 Scale inhibition in petroleum and natural gas production |
| 08/07/1997 | DE19606633A1 Drinking water treatment plant for removing calcium carbonate |
| 08/05/1997 | US5653917 Rust-removing alkali metal hydrogen citrate composition |
| 07/31/1997 | DE19603026A1 Verwendung von Mischungen aus Aminphosphaten und Polyasparaginsäure oder Asparaginsäure-Copolykondensaten als Scale-Inhibitoren bei der Erdöl- und Erdgasgewinnung Using mixtures of amine phosphates and polyaspartic acid or aspartic acid copolycondensates as scale inhibitors in the oil and gas extraction |
| 07/29/1997 | US5652330 Preparation of polycondensates of citric acid and use thereof in detergents and cleaners |
| 07/29/1997 | US5651880 Water softener brine tank insert |
| 07/23/1997 | EP0785422A1 Detectable polymers and methods for detecting polymers in aqueous systems |
| 07/23/1997 | EP0785303A1 Electric steam household apparatus with an antiscaling device |
| 07/23/1997 | EP0784599A1 Corrosion inhibiting compositions for aqueous systems |
| 07/23/1997 | CN2258161Y Device for transmitting electric wave in liquid |
| 07/22/1997 | US5650072 Sulfonate and sulfate dispersants for the chemical processing industry |
| 07/22/1997 | CA2093019E Apparatus and method for hydrolysis of cyanide-containing liquids |
| 07/18/1997 | CA2189686A1 Stabilization of magnesium hydroxide slurries |
| 07/16/1997 | CN1154377A Method for preparing phosphorus contained multicomponent copolymer |
| 07/15/1997 | US5647995 Method for the control of calcium carbonate scale using compounds prepared from acetylenic compounds and inorganic phosphite salts and their derivatives |
| 07/10/1997 | WO1997024290A1 Methods and compositions for controlling biofouling using fluorosurfactants |
| 07/10/1997 | DE19641013A1 Device for adding carbon di:oxide to water cycle to reduce acidity |
| 07/08/1997 | US5645756 Containing water soluble polymers and phosphonates |
| 07/03/1997 | WO1997023692A1 Device for deliming water outlets |
| 07/03/1997 | WO1997023522A1 Low molecular weight structured polymers |
| 07/03/1997 | WO1997023414A1 Process for preventing scale formation in water stripping operations |
| 07/02/1997 | EP0781729A1 Process for the controlled fixing of scale inhibitor in subterranean formations |
| 06/26/1997 | DE19548318A1 Biodegradable poly:carboxylic acid hemi:amide scale inhibitors |
| 06/25/1997 | EP0780406A2 Phosphonic acid polymers |
| 06/25/1997 | CN2256877Y Magnetizing apparatus for removing scale |
| 06/25/1997 | CN1152554A Water-treating agent and method for treating water |
| 06/19/1997 | WO1997021633A1 Inhibiting deposition of dissolved silica from brine |
| 06/19/1997 | WO1997021632A1 Method for desalinating and demineralising solutions containing acids and/or metal salts |
| 06/18/1997 | EP0778731A1 Ionene polymers containing biologically-active anions |
| 06/18/1997 | CN2256421Y Electronic water treating device |
| 06/17/1997 | US5639722 Acidic aqueous cleaning compositions |
| 06/11/1997 | EP0777696A1 Process for preparing polyaspartic acid salts |
| 06/11/1997 | CN1151380A Water treatment agent |
| 06/11/1997 | CN1035110C Equipment for de-alkalization of industrial waste water by sulfur dioxide |
| 06/05/1997 | WO1997019897A1 Drinking water system cleaner, cleaning method and use thereof |
| 06/04/1997 | CN2255429Y Scale-proofing scaling purifyer |
| 06/04/1997 | CN2255427Y Small energy-saving electronic scaler |
| 06/03/1997 | US5635575 Agent for water treatment containing a polymer for water treatment and a process for producing said polymer |
| 05/28/1997 | EP0775170A1 Method for producing condensates of aspartic acid |