Patents
Sitemap › C02 - Treatment of water, waste water, sewage, or sludge › C02F - Treatment of water, waste water, sewage, or sludge › C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Patents for C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632)
10/2000
10/18/2000CN1057511C Agent and method for cleaning pre-membrane of circulation system at hot status
10/18/2000CN1057510C Silicate coating inhibition and scale preventing agent
10/17/2000US6131657 Method for preventing or inhibiting metal deposition
10/11/2000EP1042423A1 Method of forming corrosion inhibitng films with hydrogenated benzotriazole derivatives
10/11/2000CN1057389C Method and device for phosphine type scale prevention agent decomposition
10/11/2000CN1057282C Sewage treatment agent and its preparing method
10/05/2000WO2000058228A1 Rust and scale removal composition and process
10/03/2000US6126859 Adding to a corrosion and deposition inhibiting composition adjusted to a neutral ph consisting of a polymer and a transition metal salt an effective amount for maintaining solubility stability at neutral ph of a hydroxycarboxylic acid
10/03/2000CA2022708C Control of scale in aqueous systems using certain phosphonomethyl amine oxides
09/2000
09/27/2000EP1038839A2 Reductive heat exchange water and heat exchange system using such water
09/27/2000CN2398270Y Apparatus purifying and softening hard water
09/27/2000CN2398269Y Water purifier for softening and purifying hard water for humidifier
09/27/2000CN2398268Y Water purifier for softening and purifying hard water for humidifier
09/27/2000CN2398267Y Domestic antiscaling apparatus with multiple-pass water inlet and outlet
09/26/2000US6123869 Precipitation of scale inhibitors
09/20/2000CN1056593C Silica scale inhibition method
09/19/2000US6120582 Process for treating the scrubbing water from the gas scrubbing process in an iron ore reduction plant
09/08/2000WO2000051945A1 Method for inhibiting the formation and deposition of silica scale in water systems
09/05/2000US6114294 Copolymeric scale inhibitors for (Poly)phosphate scale control
09/05/2000US6113797 Pretreatment to remove suspended materials, adding acid and antiscaling agent, then pressurized passage through reverse osmosis membrane, mixing water having osmosis concentrated impurities with purified water and repeating reverse osmosis
09/05/2000CA2022393C Ethoxylated n,n-bis-phosphonomethyl 2-(hydroxy)ethylamine n-oxides and water-soluble salts thereof
09/05/2000CA2022392C 4-phosphonomethyl-2-hydroxy-2-oxo-1,4,2-oxazaphosphorinane n-oxide and water-soluble salts thereof
08/2000
08/24/2000WO2000026147A8 Method for purifying and softening water
08/24/2000DE19907056A1 System zur Aufbereitung von Trinkwasser System for the treatment of drinking water
08/23/2000EP1029825A2 System of treating drinking water
08/23/2000EP1029824A2 Physical system for the treatment of water and/or other liquids and/or hydrocarbons, gases, suited for preventing the formation of incrustations
08/23/2000EP0767806B1 Soluble, crosslinked polyaspartates
08/23/2000CN1055671C Method for treating waste water from chlorhydrin biology and containing organic chlorid compound
08/17/2000WO2000047522A1 System for treating fluids in an electric field
08/17/2000CA2362660A1 System for treating fluids in an electric field
08/16/2000CN1055450C Device for treating water using electric field
08/15/2000US6103686 Chelating composition
08/15/2000US6103129 Method for the critical water oxidation of organic compounds
08/15/2000US6102683 Compressor installation having water injection and a water treatment device
08/10/2000DE10003515A1 Vor Kesselstein und/oder Korrosion schützende Zusammensetzung Scale inhibitors and / or corrosion inhibiting composition
08/09/2000EP1025191A1 Acid cleaning compositions containing alkoxylated amines and their use
08/09/2000EP1025053A1 Performance-based control system
08/09/2000CN1055275C Phosphoretted ternary-copolymer water antisludging agent
08/08/2000US6099755 Method and composition for inhibiting scale and controlling corrosion in cooling water systems
08/08/2000CA2020858C Water treatment agent and water treatment method for boiler
08/03/2000WO2000044962A1 Chemical for water treatment and method of water treatment
08/03/2000WO2000044677A1 Scale and/or corrosion inhibiting composition
08/02/2000EP1023423A1 Alkoxylated amines and their use in cleaning compositions
08/01/2000US6096847 Unsaturated organic monomer or salts thereof consisting of monoethylenically unsaturated carboxylic acids, unsaturated carboxylic acid anhydrides, unsaturated sulfonic acids; antideposit agents
07/2000
07/25/2000CA2046878C Oxygen scavenger for a boiler water system and a method of removing dissolved oxygen in a boiler water system
07/20/2000WO2000041972A1 Process for removing organic and inorganic contaminants from phenolic stripped sour water employing reverse osmosis
07/20/2000CA2359464A1 Process for removing organic and inorganic contaminants from phenolic stripped sour water employing reverse osmosis
07/19/2000CN1054589C Inorganic antiscale preservative for low-pressure boiler and compounding process therefor
07/18/2000US6090345 Phosphorus-containing compounds based on 1-hydroxypropane-1, 3-diphosphonic acid
07/12/2000EP1018572A1 The use of polyether hydroxycarboxylate copolymers in textile manufacturing and treating processes
07/12/2000EP1017427A1 Chelators in combination with biocides: treatment of microbially induced biofilm and corrosion
07/12/2000CN1054357C Scale-inhibiting dispersion agent for water treatment
07/05/2000CN1258649A Recompounded multielement antisludging corrosion inhibitor
07/05/2000CN1258648A Multifunctional additive for cooling water system
07/05/2000CA2293058A1 The use of polyether hydroxycarboxylate copolymers in textile manufacturing and treating processes
07/04/2000US6083403 Metal surfaces
06/2000
06/28/2000CN1258265A System for recovering waste water
06/28/2000CN1257841A Corrosion-retarding scale inhibitor for boiler
06/22/2000WO2000035926A1 1-hydroxy-3-sulfonoalkane-1,1-diphosphonous acids
06/22/2000CA2353863A1 1-hydroxy-3-sulfonoalkane-1,1-diphosphonous acids
06/20/2000US6077440 Inhibition of silica and silicate deposition
06/20/2000US6076536 Cleaning and passivating water distribution systems
06/15/2000WO2000034190A1 Method and compositions for minimizing biological and colloidal fouling
06/15/2000DE19857251A1 1-Hydroxy-3-sulfonoalkan-1,1-diphosphonsäuren 1-hydroxy-3-sulfonoalkan-1,1-diphosphonic acids
06/14/2000EP1008561A2 Calcium hardness reducing technology for recycled water of papermill
06/14/2000CN1053430C Process for treatment of water
06/08/2000WO2000032610A1 Phosphonate-containing mixtures
06/08/2000DE19855333A1 Phosphonhaltige Mischungen Phosphonhaltige mixtures
06/08/2000CA2352756A1 Phosphonate-containing mixtures
06/08/2000CA2291507A1 Calcium hardness reducing technology for recycled water of papermill
06/06/2000US6072025 Salts of polyaspartic acid by high temperature reaction
06/06/2000US6071434 Phosphino derivatives
06/06/2000US6071413 Process for removing organic and inorganic contaminants from phenolic stripped sour water employing reverse omosis
06/02/2000WO2000030985A2 Scale and corrosion inhibitor
06/02/2000CA2351508A1 Scale and corrosion inhibitor
05/2000
05/31/2000CN2380561Y High-frequency current generator of descaling and scale-preventing for heating equipment
05/25/2000WO2000029337A1 A system and a method for removing ions from aqueous liquid streams
05/25/2000WO2000018695A3 Water treatment
05/25/2000WO2000003781A8 Apparatus for treating flowstreams by electromagnetic flux
05/25/2000DE19853561A1 2-Phosphono-butan-1,2,4-tricarboxylic acid monoalkyl esters and salts are used for treating water and technical liquids containing water as scale and corrosion inhibitor and sesquestrant
05/24/2000CN1253918A Water treatment method of water system of central air conditioner system
05/24/2000CN1253914A Method for preventing heating water of boiler from illegal using
05/23/2000US6066260 Means of and process for regulating the hardness and pH value of water in freshwater aquaria
05/23/2000CA2252060A1 Method and composition for corrosion and deposition inhibition in aqueous systems
05/16/2000US6063884 Contacting unsaturated monomer solution with a chain transfer agent having specific phosphorus atom degree of oxidation and hydrogen peroxide (h2o2) initiator, in absence of agent(s) which decompose h2o2 to form free radicals or generate them
05/16/2000US6063290 Antideposit agents and antiscaling agents
05/16/2000US6063289 Method for controlling scale using synergistic phosphonate blends
05/16/2000US6063288 Antideposit agents on surfaces using imidazoline compounds or derivatives
05/16/2000US6063267 Apparatus for treating flowing liquid with electromagnetic flux
05/11/2000WO2000026438A1 Process for dispersing iron oxide in steam generating boilers
05/11/2000WO2000026147A1 Method for purifying and softening water
05/11/2000WO2000025644A1 Drip-type coffee-maker comprising a water treatment device
05/11/2000CA2348671A1 Drip-type coffee-maker comprising a water treatment device
05/10/2000CN1252388A Method for removing boiler scale
05/03/2000EP0881991B1 A method for inhibiting the deposition of silica and silicate compounds in water systems
05/03/2000CN1052018C Preparation of polymers containing aspartic acid
05/02/2000US6056878 Method and apparatus for reducing scaling in electrodeionization systems and for improving efficiency thereof
04/2000
04/27/2000WO1999054257A9 Inorganic composition, process of preparation and method of use
04/26/2000CN1051750C Using method of biological decontaminant in circulation water system
04/25/2000US6054106 Magnesiosilicates
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