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| Number | Title | Issue Date |
| 4172787 | Reaction of -phosphorus containing carboxylic acids with phosphorous acid to prepare scale and corrosion inhibitors Novel compounds and the use of these compounds in inhibiting corrosion and scale in open cooling systems containing ferrous materials which are: ##STR1## These compounds are prepared by a carboxylic acid-phosphonic acid interchange in the general rea... | 10/30/1979 |
| 4172032 | Polyphosphate-based industrial cooling water treatment When a specific condensed phosphate glass is combined with an organic phosphate ester, an improved composition is afforded for preventing scale and corrosion in industrial cooling systems. Optionally, certain azoles are combined with the phosphate glass a... | 10/23/1979 |
| 4168230 | Synergistic composition comprising phosphorylated ethoxylated glycerine and polyacrylic acid for the prevention of CaCO3 scale in cooling water When certain low molecular weight polyacrylic acid salts are combined with an organic phosphate ester, an improved composition is afforded for preventing scale in industrial cooling systems.... | 09/18/1979 |
| 4159946 | Treatment of aqueous systems A method of inhibiting the precipitation of scale-forming salts of calcium, magnesium, barium and strontium from aqueous systems which involves adding to the aqueous system a telomeric compound of the formula: ##STR1## and the salt forming derivative... | 07/03/1979 |
| 4157364 | Process for preparing dimethylaminomethylenebis(phosphonic acid) Dimethylaminomethylenebis(phosphonic acid) is prepared by reacting dimethylformamide with phosphorous trichloride and treating the reaction mixture with alcohols or glycols and water. The phosphonic acid is combined with water soluble carboxylic acid poly... | 06/05/1979 |
| 4148728 | Scale-inhibiting compositions for aqueous solutions Compositions for inhibiting the deposition of scale from aqueous solutions onto surfaces in contact with the solutions, such compositions comprising at least one fluorocarbon which will deposit on such surface, exemplary fluorocarbons being at least one o... | 04/10/1979 |
| 4132526 | Process for protecting asbestos-cement bearing surfaces in recirculating cooling water systems The invention is directed to a method of inhibiting the destructive effect of water in contact with an asbestos-cement containing structure due to the leaching of the water soluble components of the cement, e.g., calcium and magnesium, which comprises the... | 01/02/1979 |
| 4127483 | Treatment of aqueous systems A method of inhibiting the precipitation of the scale forming salts of calcium, magnesium, barium and strontium from aqueous systems comprising adding to the aqueous system a minor proportion of a product comprising a telomeric compound of the formula: ... | 11/28/1978 |
| 4092244 | Corrosion and scale inhibitors for industrial recirculating cooling water systems Disclosed is a chemical composition and a process for inhibiting corrosion and scaling on metal surfaces in industrial cooling water systems. The process includes the addition to the cooling water of from 10 to 200 ppm of an alkyl polyethoxy compound havi... | 05/30/1978 |
| 4089893 | 2,2,2-Tris(hydroxymethyl)ethylphosponic acid and method for its preparation This invention relates to a novel phosphonic acid, 2,2,2-tris (hydroxymethyl) ethylphosphonic acid, and to a process for its preparation. It also relates to the use of such phosphonic acid as an inhibitor of corrosion of metal surfaces and as an inhibitor... | 05/16/1978 |
| 4077997 | Diphosphonoalkane carboxylic acids, process of preparation and methods of use Diphosphonoalkane carboxylic acids having the formula ##STR1## wherein R is H or --CH2 --CH2 --COOH; as well as their water-soluble salts. The compounds are excellent sequestering agents, especially for alkaline earth and earth ... | 03/07/1978 |
| 4075291 | Pyrophosphates Pyrophosphates, containing both oxygen and sulfur, of the formula ##STR1## where X is oxygen or sulfur such as those of the formula ##STR2## where R is other than a lower alkyl group (i.e. containing less than seven carbon atoms) and preferably ... | 02/21/1978 |
| 4057511 | Process for preventing corrosion and the formation of scale in water circulating system Preventing corrosion and scale formation in water re-circulating systems by adding to the water to be circulated from about 5 to 100 g/m3, based on the weight of the water to be circulated, of a compound selected from the group consisting of th... | 11/08/1977 |
| 4051029 | Process of inhibiting scale formation with mixtures of thio-, oxygen or thio-oxygen phosphates and pyrophosphates Mixtures of Thiophosphates, pyrophosphates containing both oxygen and sulfur, and oxygen phosphates are effective as scale inhibitors. The mixtures are synergistically more effective as scale inhibitors than each component individually. These synergistic ... | 09/27/1977 |
| 4048065 | Control of corrosion and scale in circulating water systems by means of partial esters of polyfunctional organic acids For inhibiting corrosion and scale on ferrous metal parts in a circulating water system there is added to the water in such system from 10 to 500 ppm of a partial ester of a polyfunctional acid having a free carboxylate, phosphonate or sulfonate group and... | 09/13/1977 |
| 4046707 | Treatment of aqueous systems A method of inhibiting the precipitation of scale-forming salts of calcium, magnesium, barium and strontium from aqueous systems comprising adding to the aqueous system a telomeric compound of the formula: ##STR1## or salts thereof, wherein R11 | 09/06/1977 |
| 4042324 | Process for inhibiting the corrosions and deposition of boiler scale in water-conveying systems Corrosion and deposition of boiler scale in water-conveying systems are inhibited. To this end the water is admixed with at least one carboxy-alkane compound of phosphorus of the general formula: ##STR1## in which each of the substituents R1 | 08/16/1977 |
| 4042323 | Process of inhibiting corrosion of metal in an aqueous environment with mixtures of thio-, oxygen and thio- oxygen phosphates and pyrophosphates Mixtures of Thiophosphates, pyrophosphates containing both oxygen and sulfur, and oxygen phosphates are effective as corrosion inhibitors particularly in aqueous and/or oxygenated systems. The mixtures are synergistically more effective as corrosion inhib... | 08/16/1977 |
| 4020101 | -Alkyl-phosphonosuccinic acid compounds and sequestering compositions containing them Certain novel -alkyl-phosphonosuccinic acid compounds of the formula ##STR1## in which R is lower alkyl, or alkenyl or alkynyl, cycloalkyl, or aralkyl are particularly suitable as sequestering agents, e.g., for incorporation into cleansing com... | 04/26/1977 |
| 4003842 | Corrosion and scale inhibitors for industrial recirculating cooling water systems Disclosed is a chemical composition and a process for inhibiting corrosion and scaling on metal surfaces in industrial cooling water systems. The process includes the addition to the cooling water of from 10 to 200 ppm of an alkyl polyethoxy compound havi... | 01/18/1977 |
| 3965265 | Antimicrobial agents for water conservation A process for the prevention of the growth of microorganisms, especially in industrial water, comprises contacting these microorganisms with an effective antimicrobial amount of a reaction product of &3xb5;-caprolactam and an N-alkylalkylene diamine with ... | 06/22/1976 |
| 3965003 | Scale inhibition and compounds therefor Phosphated oxypropylated hydroxy hydrocarbons obtained by reacting polyphosphoric acid or phosphorus pentoxide or mixtures thereof with oxypropylated hydroxy hydrocarbons, with or without neutralization, are used as scale inhibitors for calcium, barium an... | 06/22/1976 |
| 3959167 | Method and composition of inhibiting scale The invention disclosed relates to a method for using a new improved composition for inhibiting or preventing accumulation of scale or the like on heating surfaces in an aqueous system. The present composition includes an acrylic polymer, a water-soluble ... | 05/25/1976 |
| 3957858 | Substituted ethane diphosphonic acids and salts and esters thereof New and useful substituted ethane diphosphonic acids and salts thereof as exemplified by the acid compound having the formula ##EQU1## 2-thiomethyl-1-hydroxy-ethane-1,1-diphosphonic acid and processes for preparing the same which generically comprise... | 05/18/1976 |
| 3933427 | Process for preventing corrosion and the formation of scale in water circulating system Preventing corrosion and scale formation in water re-circulating systems by adding to each cubic meter of the water being re-circulated from about 5 to 100 grams of a compound selected from the group consisting of those of the formula ##EQU1## a... | 01/20/1976 |
