Patents
Patents for C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632)
06/1983
06/21/1983US4389324 Polymeric composition for preventing the formation of scale during evaporation of sugar juices
06/21/1983US4389317 Process for chemical reduction of the phosphate content of water
06/21/1983CA1148438A1 Use of acrylic acid/sodium vinyl-sulfonate copolymers as dispersants in boiler applications
06/14/1983US4388194 Hydrogen sulfide abatement in geothermal steam systems
06/14/1983CA1148058A1 Method and composition to inhibit staining of porcelain surfaces by manganese
06/14/1983CA1148057A1 Method and composition to inhibit staining of porcelain surfaces by manganese
06/07/1983US4387027 Potective oxide film formed in presence of orthophosphate and water soluble acrylic acid/hydroxyalkyl acrylate copolymer
05/1983
05/31/1983US4386005 Low molecular weight polyacrylic acid-phytic acid mixtures; synergistic
05/24/1983US4384979 For cooling water injection, containing a thioglycolic acid-terminated acrylic acid polymer
05/18/1983EP0079165A2 (METH) acrylic acid/itaconic acid copolymers, their preparation and use as antiscalants
04/1983
04/20/1983EP0077187A1 Method of inhibiting corrosion and controlling deposition in an aqueous medium
04/19/1983CA1144856A1 Method of aquifer restoration
04/19/1983CA1144714A1 Polyacrylic acids and methyl vinyl ether/maleic anhydride copolymers as soft scale inhibitors
04/05/1983CA1143925A1 Stabilization of aqueous silicates using alkali siliconates of silylalkyl phosphonates
03/1983
03/30/1983EP0075514A1 Cationic polymers and surfactants as silica polymerization retardants and dispersants
03/22/1983US4377484 Method of chelating heavy metal ions
03/16/1983EP0074336A1 Systems inhibited against corrosion and/or scale formation
03/15/1983CA1142744A1 Composition and method for controlling corrosion in aqueous systems
02/1983
02/22/1983US4374733 Acrylic acid-hydroxyalkyl acrylate copoly-mer, antiscaling agents
02/22/1983US4374572 Method and composition to inhibit staining of porcelain surfaces by manganese
02/15/1983US4374040 Anticorrosion, antiscale, antiderposit
02/09/1983EP0071323A1 Method and composition for treating aqueous mediums
02/08/1983US4373070 Cross-linked polymers having pendant oxyalkyl tertiary amine groups
02/08/1983US4372870 Method and composition for treating aqueous mediums
12/1982
12/29/1982EP0067940A1 Sea water desalination unit
12/28/1982US4366066 Stabilization of softened water with self-generated CO2
12/14/1982US4363794 Oral composition for caries prophylaxis
12/14/1982CA1137420A1 Geothermal brine treatment
12/08/1982EP0066544A1 Water treatment
11/1982
11/30/1982US4361555 α-1,4-Thiazine alkanephosphonic acids
11/30/1982US4361492 Particulate dispersant enhancement using acrylamide-acrylic acid copolymers
11/23/1982US4360547 Selective scale formation
11/02/1982US4357254 Cleaning composition
11/02/1982US4357248 Treating wells with self-precipitating scale inhibitor
11/02/1982US4357207 Low molecular weight cationic polymers as deposit inhibitors and dispersants in black liquor recovery systems
10/1982
10/27/1982EP0063197A1 Method and composition for treating aqueous mediums
10/20/1982EP0062718A1 Method and composition for treating aqueous mediums
10/19/1982US4354940 Sodium alumoglucoheptonate, a process for its preparation and its use as sequestering agent
10/19/1982CA1133787A1 Iron oxide deposit control for boilers
09/1982
09/28/1982US4351796 Method for scale control
09/16/1982WO1982003133A1 Control apparatus for use in multiple steam generator or multiple hot water generator installations
09/15/1982EP0060150A2 Regeneration cycle control system in a water conditioner controlled by a flow meter
09/14/1982US4349412 Method of concentrating and drying water-containing fluent media
09/14/1982CA1131436A1 Corrosion inhibition treatments and method
09/08/1982EP0059259A1 Process for preparing N-(carboxy-alkyl)-1-amino-alkane-1,1-diphosphonic acids and their alkali salts
09/07/1982US4347704 Thermal power plant water treatment process
09/01/1982EP0058794A1 Composition and method for treating an aqueous medium
08/1982
08/25/1982EP0058597A1 Thickened aqueous acid solutions, and their use, especially for descaling
08/24/1982US4346217 Di-quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids
08/18/1982EP0058073A2 Acrylate/maleate copolymers, their preparation and use as antiscalants
08/17/1982US4344860 Stabilization of silicates using salts of substituted nitrogen or sulfur containing siliconates
08/10/1982US4343713 Particulate composition
08/10/1982CA1129174A1 Process for recovery of chemicals from saline water
08/03/1982US4342733 Adding phosphorous containing topping agents
08/03/1982US4342652 Process for scale inhibition in evaporative desalination units
08/03/1982US4342584 Microbiocidal process using di-quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids
07/1982
07/28/1982EP0056627A2 Copolymer and method for manufacture thereof
07/27/1982CA1128402A1 Water treatment
07/22/1982WO1982002379A1 Cleaning composition
07/21/1982EP0056180A1 Method and composition for inhibiting the amount of oxidation of sulfite in a sulfite containing aqueous gas scrubber medium
06/1982
06/30/1982EP0054733A1 Surfactant, process for making it, and use of it
06/22/1982US4336232 Production of purified brine
06/22/1982US4336156 Quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids
06/22/1982CA1125965A1 Granulate based on polymer phosphate and alkali aluminium silicate
06/15/1982CA1125932A1 Process and an apparatus for chemical reduction of phosphate content of water by adding at least one reagent which forms a crystalline difficulty soluble salt, and contacting the liquid with a seed material promoting the crystallisation
05/1982
05/19/1982EP0051891A1 Improved polyethylene oxide cake with reduced gelling for flush toilet wastewater sanitation
05/19/1982EP0051696A1 Improved polyethylene oxide cake with reduced gelling for flush toilet wastewater sanitation
05/18/1982US4330487 N,N-Dimethylene phosponic acids of alkylene diamines
05/18/1982CA1123701A1 Scale inhibitors
05/12/1982EP0051104A1 Process for the treatment of water containing nitrate
05/11/1982CA1123307A1 Surfactant chelating scale inhibitor and dispersant for wet scrubber deposit control
05/05/1982EP0050894A1 Water-softening compositions on basis of aluminosilicates and detergent compositions containing them
05/04/1982US4328106 Method for inhibiting silica precipitation and scaling in geothermal flow systems
04/1982
04/27/1982US4326980 Acrylic copolymer composition inhibits scale formation and disperses oil in aqueous systems
04/27/1982US4326962 Sulfur-containing lignins as magnesium sulfite tri-hydrate dispersants
04/27/1982CA1122393A1 Synergistic corrosion inhibitors for ferrous metals
04/13/1982US4324664 Method and composition for treating aqueous mediums
04/06/1982US4323461 Process of inhibiting scale formation in aqueous systems using di-quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids
04/06/1982US4323460 Process of inhibiting scale formation in aqueous systems using α-1,4-thiazine alkanephosphonic acids
04/06/1982US4323459 Process of inhibiting scale formation in aqueous systems using quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids
03/1982
03/24/1982EP0047956A1 Removal of scale from porous diffusion tiles
03/10/1982EP0047150A2 Improvements relating to aminomethylenephosphonic acid solutions
03/03/1982EP0046706A2 Supported sequestering agents, process for their production and their use in organic synthesis and extraction of metals
02/1982
02/23/1982CA1118589A1 Method of corrosion inhibition in aqueous mediums
02/17/1982EP0046078A1 Inhibition of scale deposition
02/09/1982US4314779 Precipitating calcium carbonate
02/09/1982CA1117844A1 Deposit control through the use of oligomeric phosphonic acid derivatives
02/02/1982US4313825 Control system for meter actuated regeneration in a water treatment system
02/02/1982CA1117624A1 Means and method for controlling an apparatus for conditioning a liquid
02/02/1982CA1117395A1 Scale prevention in industrial cooling waters using phosphonocarboxylic acids and certain acrylic acid polymers
01/1982
01/19/1982US4311663 α-1,4-Thiazine alkanephosphonic acids as corrosion inhibitors
01/12/1982US4310435 Aldehydes
01/06/1982EP0042940A1 Heteroalkylene-bis-anthraquinones
01/05/1982US4309383 Di-quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids as corrosion inhibitors
01/05/1982CA1115728A1 N-sulphohydroxyalkane-aminoalkanephosphonic acids, their alkali salts, and a process for their production
12/1981
12/29/1981US4308147 Antiscaling agents, antideposit agents
12/22/1981US4307038 N-Carboxy alkyl amino alkane polyphosphonic acids
12/22/1981US4306991 Scale inhibition
12/22/1981CA1114978A1 Sludge conditioning composition for scale inhibition in water
12/16/1981EP0041879A1 Compositions of acrylic polymer, process for obtaining them and application as antifouling agents
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