| 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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| 03/07/1991 | CA2024613A1 Inhibition of depositions in aqueous systems |
| 03/05/1991 | US4997571 Method of treating water |
| 02/21/1991 | WO1991002011A1 Phosphonomethylated polyvinyl amines, process for preparing them and their use |
| 02/14/1991 | DE3926059A1 Phosphonomethylierte polyvinylamine, verfahren zu ihrer herstellung und ihre verwendung Phosphonomethylated Polyvinylamines, process for their production and their use |
| 02/12/1991 | US4992182 Scale removal treatment |
| 02/12/1991 | CA1280057C Enhanced cleaning procedure for copper alloy equipment |
| 02/06/1991 | EP0411049A1 Composition for introduction into a high temperature environment |
| 01/30/1991 | CN1048897A Water-treating agents and process use in boiler |
| 01/23/1991 | EP0408884A2 Hydrophobically modified polycarboxylate polymers utilized as detergent builders |
| 01/23/1991 | CN2069855U Remover for incrustation scale |
| 01/23/1991 | CN1048693A Treating agent for alkaline composite water |
| 01/22/1991 | CA1279241C Removal of iron fouling in cooling water systems |
| 01/16/1991 | EP0408297A1 Scale inhibition |
| 01/16/1991 | EP0408082A2 Water treatment method for boiler |
| 01/09/1991 | EP0406622A2 Scale removal and prevention device |
| 01/02/1991 | CN1011038B Copolymer of low-molecular weight acrylate acrylamide and process for salt deposit of at least bufen part prevent aqueous medium produce |
| 12/27/1990 | EP0404377A1 Water soluble copolymers of maleic anhydride |
| 12/25/1990 | US4980433 Novel amine-containing copolymers and their use |
| 12/25/1990 | US4980077 Method for removing alkaline sulfate scale |
| 12/19/1990 | EP0403465A1 Biocidal methods for recirculating water systems |
| 12/19/1990 | EP0402710A2 Interpolymers for barium sulphate inbihition |
| 12/19/1990 | CN2067708U Combined ion exchange water processor with float bed |
| 12/18/1990 | US4978456 Adding mixture of water-soluble polymers of acrylic acid, maleic acid, maleic anhydride, salt of 1-hydroxyethylidene-1,1-diphosphonic acid and chelating compound |
| 12/18/1990 | CA1278142C Slightly crosslinked, water-soluble polymaleic acid, its preparation andits use |
| 12/17/1990 | WO1990015780A1 Biocidal methods and compositions for recirculating water systems |
| 12/12/1990 | CA2018513A1 Interpolymers for barium sulphate inhibition |
| 12/11/1990 | US4977292 4-phosphonomethyl-2-hydroxy-2-oxo-1,4,2-oxazaphosphorinane N-oxide and water-soluble salts thereof |
| 12/04/1990 | US4975202 Increasing temperature and/or salt concentration induced cloud point with synergistic combination of cyclohexylamine and diethylaminoethanol |
| 11/27/1990 | US4973744 Antiscale and anticorrosion agents for water treatment |
| 11/27/1990 | US4973428 Phosphate salts, hydroxy, carboxy or sulfonate containing polymer |
| 11/27/1990 | US4973409 Treatment of aqueous systems |
| 11/27/1990 | US4973201 Method for removing scale and radioactive material from earth |
| 11/27/1990 | CA1276862C Method of removing scale from wet oxidation treatment apparatus |
| 11/22/1990 | EP0398724A2 Process for preparing water soluble copolymers of aliphatic monoethylenically unsaturated dicarboxylic acids and unsaturated monomers |
| 11/17/1990 | CA2015980A1 Maleate polymerization process |
| 11/14/1990 | WO1990014314A1 Use of water-soluble copolymerizates obtained from monoethylenically unsaturated carboxylic acids and vinylimidazole (derivatives) as water-softening agents |
| 11/14/1990 | EP0397450A1 Novel copper and copper alloy corrosion inhibitors |
| 11/14/1990 | CA2051678A1 Use of water-soluble copolymers of monoethylenically unsaturated carboxylic acids and vinylmidazoles or derivatives thereof for water treatment |
| 11/13/1990 | US4969520 Separation, softening; precipitation, flowing through wear ion exchange resin, steam generation |
| 11/07/1990 | EP0396303A2 Process for producing and use of maleic acid (co-) polymer salt improved in biodegradability |
| 11/06/1990 | US4968431 Process for treating cooling water |
| 10/24/1990 | CN1046318A Cleaning technique of waste water by electromagnetic field |
| 10/18/1990 | WO1990011972A1 Sulfate scale dissolution |
| 10/16/1990 | US4963631 Polymers |
| 10/16/1990 | US4963268 Method and system for variable frequency electromagnetic water treatment |
| 10/16/1990 | US4963267 Stabilization of manganese in aqueous systems |
| 10/09/1990 | US4962229 Antiscaling agents |
| 10/09/1990 | US4962123 Industrial fungicides, bactericides |
| 10/09/1990 | US4961872 Calcium hypochlorite tablets |
| 10/04/1990 | WO1990012159A1 Method of decontaminating earth and/or natural gas processing equipment |
| 10/02/1990 | US4960522 Copolymers of an acrylic acid and alkoxyalkyl acrylate as scale inhibitors |
| 09/26/1990 | EP0388836A1 Composition for treating water or aqueous systems |
| 09/26/1990 | CN1045608A Heat-type cleaning solution for anti-choking of sewage |
| 09/26/1990 | CN1009729B Recipe of water treatment reagent of tungsten system |
| 09/25/1990 | US4959156 Block co-polymers useful as aqueous dispersants |
| 09/21/1990 | CA2012501A1 Composition for treating water or aqueous systems |
| 09/13/1990 | CA2001538A1 Application of glucanase to control industrial slime |
| 08/29/1990 | EP0384779A1 Scale inhibition |
| 08/29/1990 | EP0266234B1 Acrylate acryl amide copolymers with a low molecular weight, and process for reducing the deposition of salt in aqueous systems |
| 08/28/1990 | US4952327 With (meth)acrylic acids or slats and 2-(meth)acrylamido-2-methylpropanesulfonic acids; effective with or without soluble metal compounds |
| 08/28/1990 | US4952326 Dispersion of particulates in an aqueous medium |
| 08/28/1990 | US4952324 Synergistic mix of methacrylic acid polymers, chelants, nonionic surfactant, phosphate aas dispersants |
| 08/22/1990 | EP0383724A2 Polymerization of maleic-acid anhydride |
| 08/22/1990 | EP0382876A1 Process for separating salts contained in seawater |
| 08/21/1990 | US4950474 Ethoxylated propoxylated alkylphenol amine; at least two phosphonate groups |
| 08/07/1990 | US4946627 Hydrophobically modified polycarboxylate polymers utilized as detergent builders |
| 08/07/1990 | CA1272424A1 Scale inhibitor |
| 08/01/1990 | EP0380299A1 Method of improving langelier index of city water and an apparatus therefor |
| 08/01/1990 | EP0380171A1 Agent and process for the cleaning of irrigation or water-distribution systems used in, for example, agriculture and horticulture |
| 07/31/1990 | US4944885 Antideposit, antiscale |
| 07/31/1990 | CA1272010A1 Basic metal hydroxysulfate complex in solid form and a method for its manufacture |
| 07/26/1990 | DE3933798A1 Testing water treatment systems for reducing scale formation - by pumping the water through a capillary in temp. controlled medium and observing blockage formation |
| 07/24/1990 | US4943371 Apparatus for reducing pitting in copper water pipes |
| 07/18/1990 | EP0378451A1 Sulfamic acid-based antiscaling composition for activated carbon, antiscaling process making use of said composition |
| 07/17/1990 | US4941979 Method of stabilizing manganese in aqueous systems |
| 07/13/1990 | CA2007280A1 Sulfamic acid descaling composition for active carbon, and discaling method thereof |
| 07/04/1990 | EP0375800A1 Process for scale inhibition for kraft digesters |
| 06/27/1990 | EP0375615A2 Method of treating water containing fertilisers |
| 06/27/1990 | EP0375385A2 Scale control |
| 06/26/1990 | US4937002 Prevention of scale precipitation in oil wells |
| 06/26/1990 | US4936987 Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
| 06/26/1990 | CA1270997A1 Modified acrylamide polymers and the like for use as scale inhibitors |
| 06/26/1990 | CA1270898A1 Fuel cell powerplant employing an aqueous solution |
| 06/21/1990 | CA2005970A1 Method of treating water containing fertilisers |
| 06/20/1990 | CA2005949A1 Scale control |
| 06/13/1990 | EP0372520A2 Slime and deposits controlling process in industrial plants |
| 06/12/1990 | US4933090 And a source of borate and molebdate ions |
| 06/12/1990 | CA1270258A1 Sulfate-containing polymers as scale inhibitors |
| 06/05/1990 | US4931206 Boiler water treatment composition |
| 06/05/1990 | US4931189 Methods for inhibition of scale in high brine environments |
| 06/05/1990 | US4931188 (meth)acrylic acid and allyloxyalkylamino copolymers as corrosion inhibitors, antiscaling agents |
| 06/05/1990 | US4931187 Cooling tower system |
| 05/30/1990 | CN2057662U Antiscaling unit |
| 05/29/1990 | US4929695 Water treatment polymers and methods of use thereof |
| 05/29/1990 | US4929362 Acrylic acid-monohydroxyalkyl allyl ether copolymers |
| 05/29/1990 | US4929361 Method of inhibiting fouling in protein-containing fluids |
| 05/23/1990 | EP0369584A1 Method for oxygen scavenging and scale prevention in boilers |
| 05/22/1990 | CA1269299A1 Apparatus employing an aqueous solution |
| 05/22/1990 | CA1269229A1 Method for prevention of phosphonate decomposition by chlorine |
| 05/15/1990 | US4925568 Polyacrylate blends as boiler scale inhibitors |