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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12/01/1981 | US4303568 Corrosion inhibition treatments and method |
12/01/1981 | US4303546 Process of treating aqueous heating media in heating systems, and composition |
11/24/1981 | US4302350 Method and composition to inhibit staining of porcelain surfaces by manganese |
11/24/1981 | CA1113007A1 Fluoride and stannous salt in acidic oral composition |
11/17/1981 | USRE30796 Scale removal, ferrous metal passivation and compositions therefor |
11/17/1981 | CA1112664A1 N-carboxyalkane-aminoalkane polyphosphonic acids and their alkali salts and a process for producing same |
11/17/1981 | CA1112663A1 N-sulphoalkane-aminoalkane phosphonic acids and their alkali salts and process for their production |
11/04/1981 | EP0039033A1 Process for preparing omega-amino-1-hydroxyalkylidene-1, 1-bis phosphonic acids |
11/03/1981 | US4298568 3-amino-5-alkyl-1,2,4-triazole |
10/27/1981 | US4297293 Sodium alumoglucoheptonate and a process for its preparation |
09/15/1981 | US4289639 Method and composition for removing sulfide-containing scale from metal surfaces |
09/08/1981 | US4288342 Sodium silicate, aluminosilicate and phosphate, (bi)carbonate, sulfate or tetraborate solubilizer |
09/08/1981 | US4288340 Granulated composition comprising a polymer phosphate and an alkali metal aluminum silicate, process of making and method of using same |
09/08/1981 | US4288327 Sulfonated styrene-maleic anhydride copolymer |
09/01/1981 | CA1107948A1 Corrosion inhibiting compositions and process of using same |
08/18/1981 | US4284513 Process for preventing encrustations on surfaces which are in constant contact with aqueous solutions containing matter prone to crystallize |
08/12/1981 | EP0033557A1 A method and apparatus for testing the effectiveness of chemicals such as scale inhibitors or scale removers |
08/12/1981 | EP0033417A1 Method of and composition for inhibiting corrosion |
08/11/1981 | US4283300 Method and composition to inhibit staining of porcelain surfaces by manganese |
08/11/1981 | CA1106843A1 N-carboxy-alkane-aminoalkane-diphosphonic acids, n- carboxy-alkane-azacycloalkane-diphosphonic acids and n-carboxy-alkane-aminoaryl-alkane-diphosphonic acids and process for theirproduction |
08/04/1981 | CA1106357A1 Process for the cleaning of fouled heat exchangers and other equipment |
07/22/1981 | EP0032416A2 Descaling process |
07/21/1981 | US4279768 Synergistic blend of ghelant, polyacrylamide conditioner and a gluconate |
07/21/1981 | US4279758 Lqundering or dishwashing water treatment |
07/15/1981 | EP0032041A2 Use of fumaric acid polymers as antiscalants, and processes for their preparation; polymeric intermediates of mono or dialkyl fumarate, and processes for their production |
07/14/1981 | US4278605 Antitumor agents |
07/07/1981 | US4277359 Water treatment to inhibit corrosion and scale and process |
07/07/1981 | US4277343 Method for continuously monitoring and controlling alkalinity for environmental purposes using a pCO2 probe |
06/23/1981 | US4275010 Antitumor, chelation |
06/02/1981 | US4271058 Anionic polymer containing ammonium functional groups, water treatments |
05/27/1981 | EP0029076A1 Method of controlling deposition in aqueous systems |
05/12/1981 | US4267108 Hydroxyalkane diphosphonic acids |
05/12/1981 | CA1100995A1 N-sulphoalkane-aminoalkane phosphonic acids and their alkali salts and process for their production |
05/06/1981 | EP0027877A1 5,8-dihydroxy-1,4-bis(guanidinyl-amino)anthraquinones |
05/05/1981 | US4265769 Method of treating aqueous systems with phosphonoadipic acids |
04/28/1981 | US4264768 Di-quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids |
04/28/1981 | US4264767 α-1,4-Thiazine alkanephosphonic acids |
04/14/1981 | CA1099275A1 Process for the manufacture of polymaleic anhydride |
04/07/1981 | US4260504 Polyoxyalkylene triol additives for minimizing deposits from aqueous heat-exchanging fluids |
04/01/1981 | EP0025863A1 Use of 1,2,4-triazole derivatives as corrosion inhibitors for non ferrous metals |
03/31/1981 | US4259483 Quaternary ammonium salts of α-1,4-thiazine alkanephosphonic acids |
03/17/1981 | US4256660 Reacting n-methylol- (meth-)acrylamide with sulfonated n-methylol-acrylamide |
03/17/1981 | US4256556 Anodically polarized surface for biofouling and scale control |
03/10/1981 | US4255572 Reacting formic acid, phosphorus trichloride, and an n,n'-dialkylurea, water treatment agents |
03/10/1981 | US4255309 Using polyacrylic acid or polysodium acrylate in a blend to prevent precipitation in black liquor of the kraft process |
03/10/1981 | US4255259 Sulfonated maleic acid or anhydride-styrene copolymer and an organic phosphonic acid, boiler water systems |
03/03/1981 | US4253969 Iron hydroxide |
03/03/1981 | US4253968 Process of inhibiting precipitation of calcium salts utilizing a copolymer of allyl monomers and maleic anhydride |
03/03/1981 | US4253950 Method for cleaning water containing devices |
03/03/1981 | US4253912 High chlorine resistance, calcium tolerance |
02/25/1981 | EP0024247A1 Composition and method for the control of scale and deposits in gas-liquid separations |
02/17/1981 | CA1095691A1 Process for converting waste dead-burned magnesium oxide-containing material into useful product |
02/03/1981 | CA1094792A1 Anti-corrosion composition for use in aqueous systems |
01/27/1981 | US4247371 Precipitating scale-forming compounds from water, and forming fresh water |
01/27/1981 | CA1094424A1 Granulate based on polymer phosphate and alkali aluminum silicate |
01/20/1981 | US4246103 Inhibit precipitation of hard water ions especially for industrial water and sludge |
01/20/1981 | US4246030 Amino alkylene phosphonic acid or its derivative |
01/06/1981 | US4243591 Poly(vinyl phosphonomethylene amino carboxylates) and process for preparation |
01/06/1981 | US4243524 Aminoalkylenephosphonic acids and salts thereof and their use in aqueous systems |
12/23/1980 | CA1092052A1 Process for separating ammonia and acid gases from waste waters containing fixed ammonia salts |
12/23/1980 | CA1092051A1 Process for separating ammonia and acid gases from waste waters containing fixed ammonia salts |
12/16/1980 | US4239648 Telomeric phosphorus corrosion inhibiting compositions |
12/02/1980 | US4237090 By adding tolyltriazole, bactericide, sodium metasilicate, sodium nitrite, and borax |
12/02/1980 | CA1090818A1 2,2,2-tris (hydroxymethyl) ethylphosphonic acid and method for its preparation |
11/25/1980 | US4235856 Method of producing a zeolite of controlled particle size |
11/25/1980 | US4235698 Electronic water treatment apparatus |
11/18/1980 | US4234511 Dialkylamino-N,N-bis(phosphonoalkylene)alkylamines and use in aqueous systems as precipitation and corrosion inhibitors |
11/11/1980 | CA1089315A1 Synergistic compositions for corrosion and scale control |
10/29/1980 | EP0018344A1 Method and composition to inhibit staining of porcelain surfaces by manganese, and toilet tank dispenser using this composition |
10/21/1980 | US4229294 Hydroxypropylene-amino-phosphonic-sulfonic acids for inhibiting scale formation |
10/21/1980 | CA1087957A1 Method of inhibiting deposition of scale from water |
10/14/1980 | CA1087480A1 Gas scrubber scale and deposit control |
09/23/1980 | US4224149 Precipitant or sequestrant for calcium ions |
09/16/1980 | US4223120 Terpolymers of maleic anhydride and their use as scale control agents |
09/03/1980 | EP0014939A2 Sodium alumoglucoheptonate, a process for its preparation and its use as sequestering agent |
09/02/1980 | US4220661 Preservative composition |
08/26/1980 | US4219672 Ether carboxylic acids |
08/19/1980 | CA1083916A1 Particulate composition |
08/05/1980 | US4216163 N-Sulfo alkane amino alkane phosphoric acids and their alkali metal salts, and a process of producing same |
08/05/1980 | US4216087 Sodium hydroxide, n-/2-hydroxyethyl/iminodiacetic acid |
07/15/1980 | US4212788 Process for producing polymaleic anhydride |
07/15/1980 | US4212734 Inhibiting scale with amino-phosphonic-sulfonic acids |
07/08/1980 | CA1081255A1 Stable substituted acrylamides or methacrylamides |
07/08/1980 | CA1081096A1 Passivating metal surfaces |
07/01/1980 | CA1080578A1 Surfactant dispersion of biological slimes |
07/01/1980 | CA1080577A1 Compositions for the inhibition of scale deposits in aquous systems |
06/25/1980 | EP0012508A2 Process for the cleaning of fouled heat exchangers and other process equipment |
06/24/1980 | US4209398 Antiscaling and antideposit agents; acrylic polymers, phosphorus compounds, metal salts |
06/17/1980 | CA1079604A1 Polymers for use in water treatment |
06/11/1980 | EP0012000A1 Prevention of deposits on metal surfaces |
06/11/1980 | EP0011743A1 Means for preventing scale deposit formation in the evaporation of sugar juices, a process for the evaporation of sugar juices and application of the means thereto |
05/27/1980 | US4205143 Acrylic acid polymer and polydimethyldiallylammonium chloride |
05/27/1980 | US4204953 Process for alkaline scaling |
05/06/1980 | US4201688 Diethylenetriaminopenta(methylenephosphonic acid) and aminotri7methylenephosphonic acid) or their alkali metal salts |
05/06/1980 | US4201669 Deposit control through the use of oligomeric phosphonic acid derivatives |
04/30/1980 | EP0010147A1 N,N'-dialkyl-ureidomethane-diphosphonic acid, its preparation and use |
04/29/1980 | US4200500 Method of preventing the adhesion of scale to the heating surfaces of a thermal desalination apparatus |
04/15/1980 | CA1075637A1 Electrostatic water treatment |
04/02/1980 | EP0009304A1 Process for inhibiting scaling in evaporative desalination units |
04/02/1980 | EP0009080A1 Corrosion inhibitors; compositions for protecting ferrous metals and the protected metals |