| 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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| 10/06/1999 | EP0946806A1 Household appliance and cassette with disincrustant means, and disincrustant method in a household appliance |
| 10/06/1999 | EP0946269A1 Inhibition and delay of deposit formation in membrane processes |
| 10/06/1999 | EP0946268A1 Method and apparatus for high efficiency reverse osmosis operation |
| 10/06/1999 | CN2342293Y 加湿机 Humidifier |
| 10/06/1999 | CN1230521A High temperature scour for cooling system of aut mobile |
| 10/05/1999 | US5961837 Process for treatment of industrial waste |
| 10/05/1999 | US5961736 Most effective in cleaning difficult to clean surfaces; low ph reduction precleaning stage; high ph extraction stage for further removal of the contaminants from the surface. |
| 10/05/1999 | CA2182675C Limescale removing compositions |
| 09/30/1999 | WO1999048822A1 Method for precipitating or flocculating substances out of solutions |
| 09/30/1999 | WO1999048821A1 Method for precipitating or flocculating substances contained in solutions |
| 09/29/1999 | EP0945407A1 Process for water treatment in distinct lines |
| 09/29/1999 | EP0945405A2 Solutions of peracids for stabilizing hardness, method of preparation, and their use |
| 09/29/1999 | CN2340771Y Filtering apparatus for anti-scaling of boiler |
| 09/22/1999 | EP0648234B1 Graft copolymers of unsaturated monomers and sugars, process for producing the same and their use |
| 09/21/1999 | CA2030541C Sulfate scale dissolution |
| 09/21/1999 | CA2022187C N,n-bis-phosphonomethyl taurine n-oxide and water-soluble salts thereof |
| 09/15/1999 | EP0799162B1 Reversible flow supercritical reactor and method for operating same |
| 09/14/1999 | US5951748 Compositions and methods for inhibiting fouling of vinyl monomers |
| 09/14/1999 | CA2119998C Multifunctional maleate polymers |
| 09/14/1999 | CA2005029C Method for reducing the buildup of slime and film in plant |
| 09/08/1999 | EP0680457B2 Fluid treatment device and method |
| 09/08/1999 | CN1227822A Scale anodic prevention method |
| 09/07/1999 | US5948268 Dissolving in water to be treated a polymer formed from water soluble monomer units comprising a (poly)alkylene oxide end capped with an addition polymerizable group at one end and an intensely fluorescent group at other |
| 09/07/1999 | US5948267 Composition and method for inhibiting chloride-Induced corrosion and limescale formation on ferrous metals and alloys |
| 09/07/1999 | CA2048427C Cooling system alkaline cleaning solution comprising polyhydroxy mono or di-carboxylic sugar acids |
| 09/01/1999 | CN1227193A Anti-sludging agent for automobile cooling system |
| 08/26/1999 | WO1999042410A1 Process for controlling scale in the sugar process |
| 08/26/1999 | CA2320848A1 Process for controlling scale in the sugar process |
| 08/25/1999 | CN1226520A Scale removing agent |
| 08/18/1999 | EP0936226A2 Ethylene-maleic anhydride derivatives and their uses |
| 08/17/1999 | US5938970 Water soluble polynucleate metal hydroxide anionic compounds; water treatment |
| 08/17/1999 | CA2262110A1 Ethylene-maleic anhydride derivatives and their uses |
| 08/17/1999 | CA2071544C Process of combatting micro-organisms |
| 08/11/1999 | EP0934948A1 Phosphorus containing compounds based on 1-hydroxy-1,3-diphosphonic acid |
| 08/11/1999 | EP0934775A1 Method and apparatus for using potassium chloride in a water softener |
| 08/11/1999 | CN1225341A Method for decorating different pictures on external surface of product according to user's requirement |
| 08/10/1999 | US5936121 Water treatment, sequestering of alkaline earth metal compounds |
| 08/04/1999 | CN2331660Y Scaler |
| 07/30/1999 | CA2238808A1 Method and apparatus for using potassium chloride in a water softener |
| 07/28/1999 | EP0931787A1 Process for preparing maleamic acid |
| 07/28/1999 | EP0931769A1 Cleaner for equipment and method for cleaning and disinfecting such equipment |
| 07/27/1999 | US5929198 High molecular weight polymers modified with n-derivatized compounds |
| 07/20/1999 | US5925716 Colorimetric or fluorometric detection with amine sulfide compounds |
| 07/20/1999 | US5925610 Multifunctional maleate polymers |
| 07/20/1999 | US5925255 Elimination of scale causing impurities prior to concentrating feedwater stream at a selected ph, raising ph to more fully ionize remaining impurities and passing feedwater through membrane separator to elute pure water |
| 07/20/1999 | CA1340659C Anti-scale and corrosion inhibitor |
| 07/14/1999 | EP0928778A2 Agent for treating boiler water |
| 07/13/1999 | US5923571 Apparatus and method for automatic congruent control of multiple boilers sharing a common feedwater line and chemical feed point |
| 07/13/1999 | CA2022274C Control of corrosion in aqueous systems using certain phosphonomethyl amine oxides |
| 07/07/1999 | CN2327678Y Magnetizer for pipe descaling and antiscaling |
| 07/06/1999 | US5919894 Using triammonium salt catalyst |
| 07/06/1999 | US5919375 Method for adjusting the pH of swimming pool, hot tub, or drinking water with urea hydrochloride |
| 06/30/1999 | EP0822923B1 Stabilization of water |
| 06/29/1999 | CA2140923C Lowering the ph of textile processing solution with an acid/base salt as a ph adjusting agent |
| 06/23/1999 | CN1220244A Water treatment agent and water treatment method for boiler |
| 06/17/1999 | WO1999029626A1 Improvements relating to the bayer process |
| 06/15/1999 | US5912219 Comprising organic acid, cationic, zwitterion, or amphoteric surfactants; odorless; removes limescale |
| 06/10/1999 | WO1999028407A1 Method of forming corrosion inhibitng films with hydrogenated benzotriazole derivatives |
| 06/10/1999 | CA2312386A1 Method of forming corrosion inhibitng films with hydrogenated benzotriazole derivatives |
| 06/09/1999 | CN1218846A Composite corrosion-inhibiting antisludging agent for strong corrosive water |
| 06/02/1999 | EP0918459A1 Agricultural compositions containing glycolic acid |
| 06/02/1999 | EP0737215B1 Graft copolymers of unsaturated monomers and polyhydroxy compounds, process for producing them and their use |
| 06/02/1999 | CN1218444A Process for treating scrubbing water from gas scrubbing process in iron ore reduction plant |
| 06/02/1999 | CN1218011A Solid composition as scale remover for cistern |
| 05/25/1999 | US5906971 Using an amine neutralized carboxylic polymer |
| 05/19/1999 | EP0916622A1 Process for preventing scale formation in a paper-making process |
| 05/19/1999 | CN1216969A Use of hydroxamated polymers to alter Bayer process scale |
| 05/19/1999 | CN1216968A Use of hydroxamated polymers to alter Bayer process scale |
| 05/12/1999 | EP0914295A1 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant |
| 05/12/1999 | EP0775092B1 Use of hydrogen sulphate as the acid constituent in conjunction with hydrogen peroxide for the cleaning of drinking-water supply equipment |
| 04/22/1999 | WO1999019432A1 Acid cleaning compositions containing alkoxylated amines and their use |
| 04/22/1999 | WO1999019431A1 Alkoxylated amines and their use in cleaning compositions |
| 04/22/1999 | DE19812588C1 Scale-inhibiting per:carboxylic acid solutions |
| 04/22/1999 | CA2304234A1 Acid cleaning compositions containing alkoxylated amines and their use |
| 04/21/1999 | EP0775167B1 Method for producing polyaspartic acid |
| 04/20/1999 | US5895763 Controlled carbonate removal from water conduit systems |
| 04/20/1999 | US5895565 Integrated water treatment control system with probe failure detection |
| 04/15/1999 | WO1999018039A1 Apparatus and method for automatic congruent control of multiple boilers |
| 04/14/1999 | CN2313919Y Water magnetizer for incrustant-proof and decrustation |
| 04/14/1999 | CN2313918Y Magnetic incrustant-proof and decrustation apparatus |
| 04/14/1999 | CN1213649A Descaling agent for gas water heater |
| 04/14/1999 | CN1042932C Sulfonated bodies of conjugated diolefine, their polymers and polymeric dispersion compsns. containing conjugated diolefine and polymers |
| 04/06/1999 | US5891972 Method of manufacturing water-soluble polymers, polymers manufactured thereby, and uses of said polymers |
| 04/06/1999 | CA2092499C Composition and method for scavenging oxygen |
| 03/31/1999 | EP0904253A1 Method for desalinating and demineralising solutions containing acids and/or metal salts |
| 03/31/1999 | CN1212240A Peppermint pure water and its preparing technology |
| 03/30/1999 | US5888959 Heating, neutralization of acid catalyst |
| 03/30/1999 | CA2186963C High water recovery membrane purification process |
| 03/23/1999 | US5886137 Preparation of salts of polyaspartic acid and their use in detergents and cleaners |
| 03/23/1999 | CA2138769C Graft copolymers of unsaturated monomers and sugars, process for producing the same and their use |
| 03/11/1999 | WO1999011578A1 Performance-based control system |
| 03/10/1999 | EP0900179A1 Use of hydroxamated polymers to alter bayer process scale |
| 03/10/1999 | CN1042446C Composition and method for scavenging oxyen |
| 03/09/1999 | US5880237 Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders |
| 03/09/1999 | US5879623 Methods and compositions for controlling biofouling using fluorosurfactants |
| 03/09/1999 | US5879563 Adding lime in first stage, adding caustic in second stage |
| 03/09/1999 | US5879562 Water treatment process for reducing the hardness of an oilfield produced water |
| 03/04/1999 | WO1999010017A1 Chelators in combination with biocides: treatment of microbially induced biofilm and corrosion |
| 03/02/1999 | US5876623 Biodegradable aspartic acid polymers for preventing scale formation in boilers |
| 02/23/1999 | US5874026 Method of forming corrosion inhibiting films with hydrogenated benzotriazole derivatives |