| 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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| 04/20/2000 | WO2000021892A1 Leaching divalent metal salts |
| 04/19/2000 | CN1250753A Protecting agent for radiator of car engine |
| 04/18/2000 | US6051142 Inhibition of silica and silicate deposition using ethylene oxide-propylene oxide block copolymers |
| 04/13/2000 | WO2000020138A1 Cleaning and passivating water distribution systems |
| 04/12/2000 | EP0992525A1 Process of preparation of biodegradable polymers having recurring succinyl units |
| 04/12/2000 | CN2373444Y Water softening equipment |
| 04/06/2000 | WO2000018695A2 Water treatment |
| 04/06/2000 | DE19845639A1 Verfahren zur Herstellung von biologisch abbaubaren Polymeren mit wiederkehrenden Succinyleinheiten A process for preparing biodegradable polymers having repeating succinyl units |
| 04/05/2000 | EP0772770B1 Determining biodegradability of iminodiacetic acid derivatives, degradable chelants, uses and compositions thereof |
| 04/05/2000 | EP0739313B1 Method for the supercritical water oxidation of organic compounds |
| 04/05/2000 | CN2372313Y Anodic anti-scaling device |
| 04/04/2000 | CA2009850C Polymerisation of maleic anhydride |
| 03/29/2000 | EP0778731B1 Ionene polymers containing biologically-active anions |
| 03/29/2000 | CN1050822C Corrosion-proof scale-inhibitor for water-heating boiler and use method thereof |
| 03/28/2000 | US6042742 Composition and method for inhibiting chloride-induced corrosion of and limescale formation on ferrous metals and alloys |
| 03/28/2000 | US6042713 Method for removing metal contaminants |
| 03/28/2000 | CA2022827C Control of corrosion in aqueous systems using certain phosphonomethyl amines |
| 03/22/2000 | CN1050586C Phosphinic sulfoacid carboxylic acid multicomponent copolymer and its synthetic method |
| 03/21/2000 | US6040406 Detectable water-treatment polymers and methods for monitoring the concentration thereof |
| 03/21/2000 | CA2182677C Acidic cleaning compositions |
| 03/16/2000 | DE19841850A1 Water softening tablets containing required amount of active components to allow accurate dosage in domestic washing machines |
| 03/15/2000 | CN2368837Y Water mangetizing apparatus with strong magnetic field and large gradient |
| 03/15/2000 | CN1247168A Water-treating chemical and its application method |
| 03/14/2000 | US6036867 Chemical agents precipitate predetermined salts; adding a precipitation inhibitor to form a supersaturated concentrate, remaining fraction is demineralized permeate, removing the effect of precipitation inhibitor to precipitate salts |
| 03/14/2000 | US6036740 Concentrated gypsum slurries for use in drip irrigation |
| 03/09/2000 | WO2000012436A1 Process for the inhibition of scale in harsh systems and novel antiscalants for same |
| 03/09/2000 | CA2340057A1 Process for the inhibition of scale in harsh systems and novel antiscalants for same |
| 03/08/2000 | CN1246548A Process for removing deposited calcium carbonate |
| 03/02/2000 | WO2000011239A1 Inhibition of corrosion in aqueous systems |
| 03/02/2000 | WO2000010928A1 Media for water treatment |
| 03/02/2000 | WO1999054257A8 Inorganic composition, process of preparation and method of use |
| 03/02/2000 | CA2340740A1 Media for water treatment |
| 03/02/2000 | CA2339982A1 Inhibition of corrosion in aqueous systems |
| 03/01/2000 | EP0914295B1 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant |
| 02/24/2000 | DE19837068A1 Water treatment composition, especially for use in cooling circuits, comprises polyaspartic acid, biocidal oxidizing agent and sulfamic acid stabilizer |
| 02/19/2000 | CA2280586A1 Method for removing scale of boiler |
| 02/17/2000 | WO2000007700A1 Method for reducing scaling in electrodeionization systems |
| 02/10/2000 | DE19835411A1 Deposition of lime on pipes lined with cement mortar for carrying water or systems containing water involves treating water with (hydrogen) carbonate and carbon dioxide |
| 02/09/2000 | EP0977619A1 Compositions and methods for inhibiting fouling of vinyl monomers |
| 02/09/2000 | CN1243833A Polyamine compounds containing phosphonic, sulfonic and carboxylic radicals and their preparing process |
| 02/09/2000 | CN1049196C Apparatus for activating silicic acid in water |
| 02/08/2000 | US6022401 Biodegradable modified polyaspartic polymers for corrosion and scale control |
| 02/03/2000 | WO2000005331A1 Method for producing solid bodies for use as cleaning agents or as agents for treating waste water |
| 02/02/2000 | EP0975551A1 Inhibition of calcium oxalate scale in aqueous based solutions |
| 02/02/2000 | CN1048964C Faint acid scale preventing and removing agent |
| 02/02/2000 | CN1048963C Lime softening water treatment method and its filtering equipment |
| 02/01/2000 | CA2030535C Method of decontaminating earth and/or natural gas processing equipment |
| 01/27/2000 | WO2000003781A1 Apparatus for treating flowstreams by electromagnetic flux |
| 01/27/2000 | DE19832563A1 Solid compacts useful for purification or effluent treatment containing at least one component which can absorb water to form hydrates |
| 01/26/2000 | EP0973861A1 Water-soluble, water-softening builder |
| 01/26/2000 | EP0896570B1 Use of hydroxamated polymers to alter bayer process scale |
| 01/25/2000 | US6017994 Utility of water-soluble polymers having pendant derivatized amide functionalities for scale control |
| 01/25/2000 | US6017399 Exposing steam phase having one or more volatile amines to the surface of component laden with solid deposit which has an acidic site and a basic site to absorp inorganic cation and anion and selective sorption of volatile amines |
| 01/19/2000 | EP0972824A2 Water-softening and detergent compositions |
| 01/19/2000 | EP0822922A4 Water softening apparatus with microprocessor control |
| 01/18/2000 | CA2182676C Maleic acid-based aqueous cleaning compositions and methods of using same |
| 01/12/2000 | EP0971230A1 Determining biodegradability of iminodiacetic acid derivatives, degradable chelants, uses and compositions thereof |
| 01/12/2000 | CN2358067Y Full automatic control mechanism for water treatment |
| 01/12/2000 | CN2358055Y Automatic electronic scaler |
| 01/12/2000 | CN1240769A Compound treating agent for water treatment |
| 01/12/2000 | CN1048278C Biodegradable copolymers, process for production and use thereof |
| 01/12/2000 | CN1048259C Graft copolymers of unsaturated monomers and sugars, process for production and use thereof |
| 01/06/2000 | WO2000000668A1 Inhibition of silica and silicate deposition |
| 01/06/2000 | WO2000000435A1 Generator of magnetic fields incremented by the passage of fluids |
| 01/06/2000 | CA2336247A1 Inhibition of silica and silicate deposition |
| 01/06/2000 | CA2336079A1 Generator of magnetic fields incremented by the passage of fluids |
| 12/29/1999 | WO1999067177A1 Composition inhibiting pipe scaling and corrosion in a water supply system |
| 12/29/1999 | CN2356026Y Electronic descaling and anti-scale device |
| 12/23/1999 | WO1999065831A1 Sequestering method and agents for carrying out said method |
| 12/23/1999 | DE19826969A1 Sequestrierverfahren und Mittel zu seiner Durchführung Sequestrierverfahren and means for its implementation |
| 12/22/1999 | CN2354939Y Multi-pole electromagnetically treating apparatus |
| 12/21/1999 | US6005040 Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders |
| 12/14/1999 | US6001264 Water-treating agent and method for treating water |
| 12/14/1999 | US6001176 Method and device for specific formation of nuclei or crystals |
| 12/14/1999 | CA2173438C Limescale removal compositions |
| 12/08/1999 | CN1047156C Cleaning agent for cooling water system of vehicle |
| 12/07/1999 | CA2193494C Method of cleaning and maintaining potable water distribution pipe systems with a heated cleaning solution |
| 12/02/1999 | WO1999061545A1 Diesel engine antifreeze composition |
| 11/30/1999 | US5993737 To obtain a product water having a positive calcium carbonate dissolution potential which is at least 2 mg/l calcium carbonate less than the calcium carbonate dissolution potential of the raw water. |
| 11/30/1999 | CA2016147C Copper and copper alloy corrosion inhibitors |
| 11/24/1999 | EP0784599A4 Corrosion inhibiting compositions for aqueous systems |
| 11/24/1999 | CN2350377Y HF electric field descaling and antiscale water treating device for thermo-power generating plant |
| 11/24/1999 | CN1236330A Method and apparatus for high efficiency reverse osmosis operation |
| 11/17/1999 | EP0957066A1 Process for precipitating or flocculating substances from solutions |
| 11/17/1999 | EP0956275A2 Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders |
| 11/17/1999 | CN1235126A Descaling agent for water pipelines of vehicle |
| 11/16/1999 | US5985152 Method of preventing corrosion in a water system |
| 11/10/1999 | CN2347967Y Multi-functional high-frequency electronic descaler |
| 11/09/1999 | US5980776 Phosphonic acid polymers |
| 11/03/1999 | CN1046124C Prepn. method and use of ureado tetramethylene phospho acid and its sodium salt |
| 11/02/1999 | US5976414 Mixture of carboxylic acid, alkali metal or ammonium silicate, anionic polymer scale inhibitor, water |
| 10/28/1999 | WO1999054257A1 Inorganic composition, process of preparation and method of use |
| 10/27/1999 | EP0774017B1 Scale and corrosion inhibiting composition for protecting surfaces in contact with water and method for the preparation of said composition |
| 10/20/1999 | EP0950029A1 Method for the prevention of scale formation by using an ether-1,1-diphosphonate |
| 10/20/1999 | CN1231996A Cleaning agent for cooling system of vehicle |
| 10/19/1999 | US5968591 Applying water mixture of di-loweralkyl fatty acid amide |
| 10/13/1999 | EP0948462A1 Organosilic system with disincrustant action in aqueous media |
| 10/12/1999 | US5965031 Generating electricity and inhibiting formation of silica-containing scale and/or removing previously formed silica-containing scale during the production by mixing in sulfurous acid, sulfurous acid precursors |
| 10/06/1999 | EP0947474A2 Device for dosage of CO2 added to water |
| 10/06/1999 | EP0946944A2 Polymer dispersants and methods of use in a nuclear steam generator |