| Patents for C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632) |
|---|
| 08/15/1989 | US4857622 Scale and settlement inhibiting agent for use in treating industrial and/or household water |
| 08/15/1989 | US4857205 Using n-phosphonomethylated amino-2-hydroxypropylene polymer |
| 08/01/1989 | US4853002 Process for removing hydrogen sulfide from waste water |
| 07/25/1989 | US4851490 Water soluble phosphonated polymers |
| 07/18/1989 | US4849129 Polymers of allyloxyalkylphosphonic acids, esters or salts |
| 07/12/1989 | EP0323680A2 Method for controlling silica/silicate deposition in aqueous systems using carboxylic polymers and molybdates |
| 07/11/1989 | US4847410 Antiscaling agents |
| 07/11/1989 | US4847017 Corrosion resistance in water systems |
| 07/04/1989 | US4844796 Full water treatment apparatus for use in soft drink dispensing system |
| 06/29/1989 | WO1989005690A1 Activating device |
| 06/27/1989 | CA1256604A1 Process for clarifying bicarbonate bearing waters using measurement and control of carbon dioxide content |
| 06/21/1989 | EP0321066A2 All-in-one boiler water treatment composition |
| 06/13/1989 | US4839461 Also neutralization by metal or ammonium hydroxides |
| 06/13/1989 | CA1255677A1 Polymeric alkylenephosphonic acid piperazine derivatives |
| 06/06/1989 | US4836933 Water treatment polymer |
| 05/30/1989 | US4835072 Apparatus employing an aqueous solution |
| 05/30/1989 | US4834955 Chemical formulation and combined process for inhibiting deposition and corrosion in cooling water and gypsum scaling in flue gas desulfurization scrubber systems |
| 05/23/1989 | CA1254482A1 Scale inhibiting composition |
| 05/17/1989 | EP0316058A1 Unsaturated, halogenated thiocyanates, the preparation thereof and use as a biocide |
| 05/16/1989 | US4830766 Use of reducing agents to control scale deposition from high temperature brine |
| 05/10/1989 | CN1032773A Full water treatment apparatus for use in soft drink dispensing system |
| 05/09/1989 | US4828795 Systems inhibited against corrosion and/or scale deposition |
| 05/09/1989 | US4828713 Boiler water treatment |
| 04/26/1989 | EP0313157A2 Process for controlling calcium oxalate scale over a wide pH range |
| 04/25/1989 | CA1253168A1 Hydrazides of amino-polyacetic acids as chelants |
| 04/24/1989 | EP0256057A4 Scale inhibitor. |
| 04/19/1989 | EP0312079A2 Full water treatment apparatus for use in soft drink dispensing systems |
| 04/19/1989 | EP0311954A2 Use of sulfamic acid to inhibit phosphonate decomposition by chlorine-bromine mixtures |
| 04/18/1989 | US4822579 Device for the deacidification of water |
| 04/18/1989 | CA1252686A1 Process and composition for controlling calcium oxalate scale over a wide ph range |
| 04/18/1989 | CA1252685A1 Polyelectrolyte and surfactant compositions for controlling alkaline earth metal scales |
| 04/12/1989 | EP0311072A2 Stabilization of metal ions and dispersion of particulates in aqueous systems |
| 04/12/1989 | EP0311070A2 Compositions containing phosphonalkane carboxylic acid for scale inhibition |
| 04/11/1989 | US4820439 Washing and cleaning agent containing surfactants, builder, and crystalline layered sodium silicate |
| 04/11/1989 | US4820423 Branched alkyl acrylamide types of polymer-zinc corrosion inhibitor |
| 04/11/1989 | US4820422 Connecting into system casing filled with movable spheres |
| 04/04/1989 | US4818795 Polymaleic acid, its preparation and its use |
| 04/04/1989 | US4818794 Slightly crosslinked, water-soluble polymaleic acid, its preparation and its use |
| 04/04/1989 | US4818506 Gypsum scale inhibitors for flue gas desulfurization systems |
| 03/29/1989 | EP0309049A1 Method for controlling calcium carbonate scaling in high PH aqueous systems using carboxylic/sulfonic polymers |
| 03/29/1989 | EP0282483A4 Electronic control system for desalinators. |
| 03/23/1989 | DE3828977A1 Composition and method for removing deposits, encrustations and the like |
| 03/21/1989 | US4814406 Scale inhibitor |
| 03/21/1989 | US4814074 Water neutralizer |
| 03/14/1989 | CA1251299A1 Scale inhibiting copolymer and method for inhibiting scale deposition |
| 03/07/1989 | US4810294 Ion exchange with soluble fluoride |
| 03/01/1989 | EP0305283A2 Inhibition of mineral deposition by polyanionic/hydrophobic peptides and derivatives thereof |
| 03/01/1989 | EP0305282A1 Inhibition of tartar deposition by polyanionic/hydrophobic peptides and derivatives thereof |
| 02/28/1989 | US4808319 Neutralization with slaked lime, selective adsorption on chelating resin |
| 02/28/1989 | CA1250498A1 Process for conditioning metal surfaces |
| 02/21/1989 | US4806259 Membrane cleaning compositions containing phosphorous compounds |
| 02/21/1989 | US4806169 Process for the removal of solid deposits from water supply installations |
| 02/14/1989 | US4804476 Sodium hexametaphosphate and acrylic acid or salt homopolymer |
| 02/08/1989 | EP0302651A1 Method for controlling calcium carbonate scaling in high PH aqueous systems |
| 02/08/1989 | EP0302522A2 Method and additive for monitoring circuit water hardness in conversion plants |
| 02/08/1989 | EP0302153A1 Carboxylic/sulfonic polymer and carboxylic/polyalkylene oxide polymer admixtures for use in iron oxide deposit control |
| 02/07/1989 | US4802990 Solution and method for dissolving minerals |
| 02/01/1989 | EP0301352A2 Olefinic diphosphonic acids, process for their preparation and their use as threshold agents, as well as complexant compositions containing olefinic diphosphonic acids |
| 02/01/1989 | EP0301351A2 Hydroxyacetonitrile diphosphonic acid, process for its preparation and its use |
| 01/31/1989 | US4801388 Sulfoalkyl(meth)acrylamides |
| 01/31/1989 | US4801387 Inhibiting corrosion and scale in a cooling water system using an acrylic acid-allylhydroxylsulfonate ether copolymer |
| 01/24/1989 | US4799995 Polyaminopolyalkylenephosphonic acid |
| 01/18/1989 | EP0299166A1 Method for removing scale on inner surfaces of boiler tube members |
| 01/18/1989 | EP0200776B1 Solution process and solvent for hardly soluble carbonates |
| 01/17/1989 | US4798675 Corrosion inhibiting compositions containing carboxylated phosphonic acids and sequestrants |
| 01/11/1989 | CN1030263A Corrosion-inhibitive and anti-sludge agent composed of derivatives of thio-phosphate ester and imidazoline phosphate ester |
| 01/10/1989 | US4797224 Branched alkyl acrylamide types of polymer-zinc corrosion inhibitor |
| 01/10/1989 | CA1248339A1 Scale removal treatment |
| 01/03/1989 | CA1248284A1 Polymer compositions detectable in water |
| 12/29/1988 | WO1988010238A1 Treatment for water systems to inhibit corrosion and scale formation |
| 12/28/1988 | EP0297049A1 Scale inhibition |
| 12/27/1988 | US4793942 Detergent with softener |
| 12/21/1988 | EP0295595A1 Membrane cleaning compositions containing phosphorus compounds |
| 12/20/1988 | CA1247292A1 Water treatment polymers and methods of use thereof |
| 12/20/1988 | CA1247284A1 Process for diluting aqueous polymer solutions |
| 12/15/1988 | WO1988009832A1 Process and installation for preventing corrosion of water pipes |
| 12/06/1988 | US4789523 Cationic and anionic lignin amines corrosion inhibitors |
| 12/06/1988 | CA1245955A1 Process for the removal of solid deposits from water supply installations |
| 11/29/1988 | US4787984 Capturing heavy metal ions with polyester having sulfodiacid, glycol, diamine monomers |
| 11/29/1988 | US4787960 For wood pulp |
| 11/29/1988 | EP0208767A4 Solution for cleansing a cooling system. |
| 11/29/1988 | CA1245550A1 Method for controlling mollusks |
| 11/23/1988 | EP0291556A1 Process for removing phosphate from waters |
| 11/23/1988 | CN88210085U Small full plastic auto-changing boiler water softer |
| 11/15/1988 | US4784774 Acrylic copolymer for scale inhibition |
| 11/15/1988 | CA1244997A1 Acrylic acid/2-acrylamido-2-methylpropyl-sulfonic acid/2-acrylamido-2-methylpropyl phosphonic polymers |
| 11/08/1988 | US4783267 Method for stabilizing metal ions |
| 11/01/1988 | US4781840 Cationic and anionic lignin amines as flocculants |
| 11/01/1988 | US4781810 Electrolysis of sodium chloride |
| 11/01/1988 | CA1243917A1 Process and agent for the prevention of tartrate deposits |
| 10/27/1988 | DE3712727A1 Model reactor for the determination of process-engineering data |
| 10/25/1988 | CA1243786A1 Cross-flow microfiltration lime softener |
| 10/04/1988 | US4775744 Cationic and anionic lignin amines |
| 10/04/1988 | US4775491 Hydrazides of amino-polyacetic acids as chelants |
| 09/27/1988 | US4774018 Acrylic acid and hydroxyalkyl acrylate copolymers with manganese compounds |
| 09/21/1988 | EP0282483A1 Electronic control system for desalinators |
| 09/14/1988 | EP0282260A2 Process to inhibit scale formation and corrosion caused by manganese in water systems by use of aminophosphonic acids |
| 09/13/1988 | US4770791 Control of metal ions using bis(aminoalkyl) piperazine derivatives |
| 09/06/1988 | CA1241653A1 Polymeric quaternary ammonium compounds, their preparation and use |
| 08/25/1988 | WO1988006143A1 Anti-scaling compounds |