Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 4532047 | Silica inhibition: prevention of silica deposition by addition of low molecular weight organic compounds A method of inhibiting amorphous silica scale formation on surfaces in contact with industrial waters which comprises treating said waters with an effective amount for the purpose of inhibiting amorphous silica scale formation of a water-soluble, low mole... | 07/30/1985 |
| 4532046 | Method for hindering the scaling by waters A method for eliminating the scaling by deposit of alkaline earth compounds from an aqueous medium; to said medium is added an agent comprising a water-soluble polymer bearer of hydroxamic groups attached to a linear hydrocarbon chain.... | 07/30/1985 |
| 4526957 | Copolymers of maleic anhydride and alkylene oxide to inhibit the precipitation and deposit of scale in aqueous systems The instant invention is directed to a copolymer of maleic anhydride and an alkylene oxide of the formula: ##STR1## wherein m is at least 4, n is at least 1, the ratio of m to n is at least 4:1, preferably 4:1 to 100:1, R, which may be the same or differe... | 07/02/1985 |
| 4520072 | Heterogeneous system photosensitive oxidation sensitizer A compound selected from some classes of coloring substances having good resistance to light and oxidation is found to have a high photosensitive activity when it is supported in an actively dispersed form on a carrier. The sensitizer obtained is useful f... | 05/28/1985 |
| 4500470 | Metal ion control agents based on dicyclopentadiene derivatives New compounds have been prepared from dicyclopentadiene bis(methylamine) which have the following formula ##STR1## wherein substituents A, B, X and Y each are independently selected from radicals including hydrogen, hydroxyalkyl (wherein the alkyl gr... | 02/19/1985 |
| 4500434 | Inhibiting scale precipitation from high temperature brine A method for inhibiting the precipitation of a scale, such as an iron silicate scale, from a hot aqueous brine solution, such as a geothermal brine, during production and handling of the brine wherein there is injected into the brine a brine-soluble acid ... | 02/19/1985 |
| 4500469 | Metal ion control compounds based on norbornane The bis(methylamine) of norbornane compounds which have at least one of the amine hydrogens substituted with hydroxyalkyl, methylenephosphonic, alkylenesulfonic, carboxylic acid radicals and salts of any of the acid radicals are useful as chelating, seque... | 02/19/1985 |
| 4497713 | Method of inhibiting corrosion and deposition in aqueous systems A corrosion inhibition and scale control method and composition are disclosed. The method comprises, adding to a cooling water system, for which protection is desired, a water soluble zinc salt, a cellulose gum material and an organo-phosphorus acid compo... | 02/05/1985 |
| 4480067 | Impeding sedimentation of clays in water A method for impeding the sedimentation of clays in water by adding a water-soluble compound. This compound is constituted by a polymer bearer of hydroxamic groups attached to a linear hydrocarbon chain. The amount of this adjuvant is small on the order o... | 10/30/1984 |
| 4472283 | Use of carbon dioxide to reduce the pH in circulating hard water The disclosure teaches a method of retarding the loss of carbon dioxide from a circulating water system by means of quaternary ammonium compounds having at least one hydrocarbon radical containing twelve or more carbon atoms or at least two hydrocarbon ra... | 09/18/1984 |
| 4469615 | Water treating compositions A water treating composition comprising a water-soluble copolymer consisting of, as the components, (A) an addition reaction product of a glycidyl ether or glycidyl ester and an ,ଲ-ethylenically unsaturated carboxylic acid and (B) another vin... | 09/04/1984 |
| 4457847 | Carboxylate polymers for internal scale control agents in boiler systems A method of treating hardness present in boiler waters which are in contact with heat transfer surfaces to prevent and remove scale caused by such hardness which comprises treating such waters with a water-soluble anionic vinyl polymer containing at least... | 07/03/1984 |
| 4455235 | Scale inhibition method employing (meth)acrylic acid/methallylsulfonate copolymer Water-soluble (meth)acrylic acid/methallysulfonate copolymers, containing less than 20% by weight of the methallylsulfonate comonomer, are well suited as scale inhibitors for aqueous environments, especially those comprising essentially equal amounts by w... | 06/19/1984 |
| 4454046 | Boiler scale prevention employing an organic chelant An improved method of treating boiler water which employs an oxygen scavenging compound and a compound to control pH together with a chelating agent, wherein the chelating agent is hydroxyethylethylenediaminetriacetic acid.... | 06/12/1984 |
| 4452703 | Control of scale in sugar evaporation equipment The instant invention is directed to a method for preventing the formation of scale in sugar evaporation equipment comprising adding to the juice from 0.1 to 200 ppm of a polycarboxylic acid or its salt selected from the group consisting of polymaleic aci... | 06/05/1984 |
| 4446045 | Composition for treating aqueous mediums Compositions are disclosed for inhibiting scale formation and dispersing solids particulate matter in aqueous mediums. The compositions comprise an acrylic acid/lower alkyl hydroxy acrylate copolymer (I) in combination with a water soluble polymeric mater... | 05/01/1984 |
| 4444675 | Alkaline scale abatement Formation of alkaline scale in water distillation equipment is reduced or substantially eliminated without a significant increase in equipment corrosion rate by dissolving an effective amount of carbon dioxide in brine which is boiling or flashed or which... | 04/24/1984 |
| 4443340 | Control of iron induced fouling in water systems A method for inhibiting corrosion and controlling deposition in an iron containing aqueous medium is disclosed. The method is capable of providing for the formation of a protective passive oxide film on the metallic surfaces in contact with the aqueous me... | 04/17/1984 |
| 4442009 | Boiler water treatment The present invention is directed to a method for controlling scale which would otherwise be formed from water-soluble calcium, magnesium and iron impurities contained in boiler water which would provide calcium, magnesium and iron ions. The method compri... | 04/10/1984 |
| 4440721 | Aqueous liquids containing metal cavitation-erosion corrosion inhibitors Compositions for inhibiting mineral scale and the corrosion of metals particularly the cavitation corrosion of aluminum in the presence of aqueous liquids are disclosed. The combination of a water-soluble phosphate with at least one of a water-soluble mol... | 04/03/1984 |
| 4440792 | Method for preventing gelation of corn steep liquor The "livering" or gelling of corn steep liquor or liquid products containing corn steep liquor is prevented or reversed by the addition of an effective amount of a calcium complexing agent, preferably at a pH of less than about 3.8.... | 04/03/1984 |
| 4432884 | Scale inhibiting agent This invention relates to a scale inhibiting agent which comprises as an essential ingredient a copolymer of an alkylolamide compound such as N-methylol acrylamide, N-hydroxyethyl acrylamide or the like and an alkenyl compound such as acrylic acid, acryla... | 02/21/1984 |
| 4421654 | Metal extraction from solution and novel compounds used therefor What is disclosed is the preparation of novel silanes, their reaction products on various substrates and the use of the treated substrates to extract metal ions from solution. An example of such a novel compound is ##STR1##... | 12/20/1983 |
| 4416785 | Scale-inhibiting compositions of matter Compositions which will inhibit the formation of scale due to calcium carbonate precipitation in recirculating water systems will comprise a mixture of polyvinylpyrrolidone and aminotri(methylenephosphonic acid). The compositions will be present in the wa... | 11/22/1983 |
| 4415467 | Agent for the purification of waste waters and process for its production The present invention is directed to a chemical composition for treating contaminated waste waters, particularly waste waters in the form of oily emulsions, to adsorb the contaminants between platelets of activated bentonite and encapsulate or trap the co... | 11/15/1983 |
| 4414183 | Phenolic chelate resin, process for producing the same, and method of recovering heavy metal ions with the same The phenolic chelate resin has a chelate-forming group wherein part or all of the hydrogen atoms in a primary and/or secondary alkylamino group introduced in a phenol nucleus are replaced by a methylenephosphonate group. Also disclosed is a process for pr... | 11/08/1983 |
| 4405461 | Control of silica scaling in industrial processes A method and product for use in controlling the deposition of silica-containing scales and their adhesion to the walls of piping and other plant components. The product is an amine to which is attached at least a pair of terminal groups. Each group is sel... | 09/20/1983 |
| 4402907 | Triazine carboxylic acids as corrosion inhibitors for aqueous systems Triazine di- and tricarboxylic acids of the formula ##STR1## wherein Z is a straight-chain or branched chain unsubstituted or substituted 1-11C alkylene group, a 2 or 3C alkenylene group, a 5-12C cycloalkylene group or an unsubstituted or substituted... | 09/06/1983 |
| 4389324 | Polymeric composition for preventing the formation of scale during evaporation of sugar juices Polymeric compositions useful for preventing formation of scale in apparatus used for evaporating sugar juices comprise a mixture of at least three polymers selected from polyacrolein or - methacrolein compounds, poly-acrylic or - methacrylic compounds, c... | 06/21/1983 |
| 4383104 | Phenolic chelate resin, process for producing the same, and method of recovering heavy metal ions with the same The phenolic chelate resin has a chelate-forming group wherein part or all of the hydrogen atoms in a primary and/or secondary alkylamino group introduced in a phenol nucleus are replaced by a methylenephosphonate group. Also disclosed is a process for pr... | 05/10/1983 |
| 4377484 | Method of chelating heavy metal ions Poly(2-vinyl pyridine-1-oxide), a nontoxic water-soluble polymer, is useful for chelating heavy metal ions, such as mercury and lead, found as a result of poisoning or environmental contamination. The polymer forms stable metal-chelate complexes and is ef... | 03/22/1983 |
| 4374733 | Method for treating aqueous mediums Methods are disclosed for inhibiting scale formation and dispersing solids particulate matter in aqueous mediums. An acrylic acid/lower alkyl hydroxy acrylate copolymer (I) in combination with a water soluble polymeric material (II) having the formula ... | 02/22/1983 |
| 4357207 | Low molecular weight cationic polymers as deposit inhibitors and dispersants in black liquor recovery systems The instant invention is directed to a method of inhibiting and dispersing deposit formation on metal surfaces of an evaporator used for the processing of black liquor which comprises the step of treating black liquor, at any point prior to completion of ... | 11/02/1982 |
| 4354940 | Sodium alumoglucoheptonate, a process for its preparation and its use as sequestering agent Sodium alumoglucoheptonate, process of preparing from sodium glucoheptonate and sodium aluminate, and use of sodium alumoglucoheptonate as a sequestering agent.... | 10/19/1982 |
| 4351796 | Method for scale control A method of inhibiting the deposition of calcium phosphate scale from an aqueous system treated with a corrosion inhibitor formulation containing a phosphono-carboxylic acid and a polyphosphate comprises adding to the aqueous system a minor amount of hydr... | 09/28/1982 |
| 4342652 | Process for scale inhibition in evaporative desalination units An effective amount of a copolymer of maleic acid or anhydride and allyl sulfonic acid when added to the water to be treated provides increased inhibition of scale formation in evaporative desalination units.... | 08/03/1982 |
| 4326962 | Sulfur-containing lignins as magnesium sulfite tri-hydrate dispersants The present invention relates to a method for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions which method comprises adding to the medium an effective amount for the purpose of a sulfur-containing lignin.... | 04/27/1982 |
| 4327189 | Reversible deflocculation of clay slurries Various clay substances, such as kaolin, can be reversibly deflocculated by treating the flocculant clay slurry with a deflocculating amount of a polymer having the general formula: ##STR1## wherein n averages at least 4; M is selected from the group... | 04/27/1982 |
| 4324664 | Method and composition for treating aqueous mediums Method and composition for controlling the deposition of scale imparting precipitates on structural parts of a system exposed to an aqueous medium containing scale imparting precipitates, under scale imparting conditions, are disclosed. Specifically, thes... | 04/13/1982 |
| 4312999 | Glyoxal-polyamine reaction products and process for their preparation Oxalyl compounds and polyalkylene polyamine derivatives of ethylene diamine and higher homolog polyamines are reacted to form a reaction product. This product is useful as an antifouling agent in the water systems of boiler and scrubbers, and particularly... | 01/26/1982 |
