Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7282087 | Wetted particle and droplet impingement surface An inert impingement surface that is pliable and which, when set in motion, works to shed itself of particle deposits. The pliable surface may be formed of a plurality of coactive members that co-operate with one another to clean-off the particle deposits from each ... | 10/16/2007 |
| 5980848 | Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate There is disclosed a process for recovering sodium bicarbonate and forming ammonium sulfate from a source containing sodium sulfate. The method involves contacting the sodium sulfate in solution with carbon dioxide and a compound containing ammonia. Sodiu... | 11/09/1999 |
| 5433936 | Flue gas desulfurization process A flue gas desulfurization process which comprises the steps of absorbing and separating sulfur oxides from a combustion waste gas using a Ca compound and, as an absorption auxiliary agent, an organic acid which has carboxyl groups at opposite ends of a s... | 07/18/1995 |
| 5096054 | Electrochemical method for the removal of nitrogen oxides and sulfur oxides from flue gas and other sources A method for removing NOX from gases is provided. A gas comprising NOX and/or SO2 is flowed behind a gas permeable anode. Air is simultaneously flowed behind the gas permeable cathode, and the cathode is separated from the anode by a liquid ele... | 03/17/1992 |
| 5043072 | Method of treating fluoride-containing water Dsiclosed is a method of treating fluoride-containing water, which comprises a reaction step where a calcium compound and/or an aluminium compound are/is added to fluoride-containing water while the pH value of the resulting suspended liquid is adjusted t... | 08/27/1991 |
| 5020457 | Destruction of acid gas emissions A method of destroying NOx and SO2 in a combustion gas in disclosed. The method includes generating active species by treating stable moleucles in a high temperature plasma. Ammonia, methane, steam, hydrogen, nitrogen or a combinatio... | 06/04/1991 |
| 5009869 | Methods for purification of air Air contaminated with chemical and biological pollutants is purified by treating chemically and electrochemically in a closed system minimizing the generation of by-products for disposal. Pollutants are treated in a scrubber zone with a scrubber liquid-el... | 04/23/1991 |
| 4956057 | Process for complete removal of nitrites and nitrates from an aqueous solution A process for complete removal of nitrites and nitrates from an aqueous solution (1) by means of electrolysis, wherein the aqueous solution (1) is fed to the cathode space (4) of an electrolysis cell (2) and an aqueous solution (10), still containing only... | 09/11/1990 |
| 4917869 | Lime hydrating plant and process of lime hydrating as well as flue gas desulfurization plant with such a lime hydrating plant and process of flue gas desulfurization A lime hydrating plant is provided with an external cooler 16 in which the rawer solids portion which is recirculated into a return flow fluidizer 2 (hydrater) is cooled outside the hydrater. This means that less water has to be atomized into the return f... | 04/17/1990 |
| 4888158 | Droplet impingement device An apparatus and method for separating unevaporated droplets from a hot gas stream such as a flue gas. The apparatus referred to as a droplet impingement device is designed to enable a modified electrostatic precipitator to efficiently remove sulfur dioxi... | 12/19/1989 |
| 4873065 | Flue gas purification process Improved flue gas purification process features a heavy metal separating process, such as an anion exchange process, in which a scrubbing condensate is treated to remove at least the Hg contained therein prior to extracting the flue ash, which was previou... | 10/10/1989 |
| 4836992 | Process for desulfurizing waste gases A process for desulfurizing waste gas is described, wherein an SO2 containing waste gas is absorbed in an aqueous solution and the resultant solution containing sulfite is treated electrolytically which is much less expensive than the prior art... | 06/06/1989 |
| 4830718 | Removal of sulfur dioxide (SO2) from waste gases and recovery as sulfuric acid A process is provided by means of acid scrubbing in combination with electrolysis for removing sulfur dioxide from a waste gas stream such as effluent vent of flue gas, for purposes of economy, for achieving a useful by-product, and for minimizing environ... | 05/16/1989 |
| 4824647 | Method of removing acid gas pollutants from flue gases A method of removing acid gas pollutants from flue gases and the like involving contacting the gas with a coal-water slurry, said coal being a type that has exchangeable cations. The exchangeable cations are exchanged with hydrogen ions and form salts wit... | 04/25/1989 |
| 4820391 | Exhaust gas clean up process A method of cleaning an exhaust gas containing particulates, SO2 and NOx includes prescrubbing with water to remove HCl and most of the particulates, scrubbing with an aqueous absorbent containing a metal chelate and dissolved sulfit... | 04/11/1989 |
| 4780114 | Molten salt hydrate membranes for the separation of gases The present invention is a membrane and a process for separating at least one component from at least one other component in a gas mixture. A gaseous mixture is passed over a membrane having a thin film of a molten salt hydrate which is selectively permea... | 10/25/1988 |
| 4750918 | Selective-permeation gas-separation process and apparatus A permeant gas is selectively transferred from a feed-gas mixture which comprises the permeant gas and at least one other component to an output fluid by the process of the invention. The process involves introducing a selective-permeation liquid into a p... | 06/14/1988 |
| 4670234 | Process for stripping nitrogen oxides and sulphur oxides as well as optionally other noxious elements of flue gas from combustion plants Process for stripping nitrogen oxides and sulphur oxides, as well as optionally other noxious elements from flue gas from combustion plants, preferably boilers of electric plants supplied with fossil fuels, the nitrogen oxides being reduced into elemental... | 06/02/1987 |
| 4668490 | Process and a device for flue gas desulphurization The invention relates to a process and a device for flue gas desulphurization using the following reaction: The hydrobromic acid thus formed is split up by electrolysis into hydrogen and bromine. The sulphuric acid thus produced is brought to a saleable c... | 05/26/1987 |
| 4615780 | Method of removing oxides of sulfur and oxides of nitrogen from exhaust gases A continuous method is presented for removing both oxides of sulfur and oxides of nitrogen from combustion or exhaust gases with the regeneration of the absorbent. Exhaust gas is cleaned of particulates and HCl by a water scrub prior to contact with a liq... | 10/07/1986 |
| 4521387 | Purification of gases containing CO and/or CO2 Gases containing CO and/or CO2 are purified by removing sulfur compounds and other impurities by catalytic reaction at elevated temperatures by a process in which the gases to be purified are passed directly through a catalyst charge containing... | 06/04/1985 |
| 4370306 | Process for separation of traces of gaseous contaminants from waste gases by chemical absorption In the separation of traces of halogens and sulfur from a halogen- and/or sulfur-containing gas stream wherein the gas stream is contacted with a wash liquid to absorb the halogens and sulfur, the improvement which comprises including in the wash liquid h... | 01/25/1983 |
| 4301128 | Method for purification of gases The present invention is directed to a method for selective purification of gases. The method comprises feeding an exhaust gas containing a solid impurity and a gaseous impurity to a separator. A substantial portion of the solid impurity is separated. The... | 11/17/1981 |
| 4170550 | Process for reducing aqueous effluents containing environmentally unacceptable compounds from a process for gasifying carbonaceous materials Aqueous effluents from a process for gasifying carbonaceous materials may contain environmentally unacceptable compounds like hydrogen cyanide, ammonia, and compounds thereof, and dissolved salts and compounds of heavy metals and sulfur compounds. These c... | 10/09/1979 |
| 4120669 | Waste gas pollution control systems A desulfurization process by which sulfur dioxide is efficiently removed from waste gases so as to meet current applicable pollution criteria.... | 10/17/1978 |
| 4113849 | Recovering sulfur from gas streams containing hydrogen sulfide Process for the recovery of sulfur from gas streams containing hydrogen sulfide comprising the steps of reacting a portion of the hydrogen sulfide with sulfur dioxide in a Claus reaction to form sulfur, removing the sulfur, incinerating the residual hydro... | 09/12/1978 |
| 4107015 | Method for removal of SO2 from gases Removal of sulfur dioxide from an aqueous solution containing the same is effected by subjecting the solution to electrodialytic water splitting. In particular SO2 is removed from dilute gas streams by means of alkaline solution scrubbing, rege... | 08/15/1978 |
| 4082835 | Removal of SO2 from gases Sulfur dioxide is separated from an aqueous solution containing the same by subjecting the stream to electrodialytic water splitting. In particular a novel method for removing SO2 from dilute gas streams by means of alkaline solution scrubbing,... | 04/04/1978 |
| 4078041 | Electrofluidized bed gas purification arrangement and method A chemically reactive electro-fluidized bed gas purification arrangement and method for cleaning a dirty gas stream including chemically reactive materials and entrained particulate materials wherein means are provided to impose a selected electrical char... | 03/07/1978 |
| 4004995 | Process for removing nitrogen oxides and sulfur dioxide from effluent gases Removal of gaseous pollutants such as nitrogen oxides and sulfur dioxide from effluent gases can be carried out advantageously from an industrial viewpoint by effecting irradiation of said gases under specifically selected conditions. High dose rate elect... | 01/25/1977 |
| 3997415 | Process for removing sulfur dioxide and nitrogen oxides from effluent gases Sulfur dioxide and nitrogen oxides can be removed from effluent gases with increased efficiency by blowing contaminated air present in the irradiation room into a stream of the effluent gases before the mixture is delivered to a reaction chamber to be irr... | 12/14/1976 |
| 3981815 | Process for utilizing collected material removed from effluent gas Effluent gas containing SO2 and/or nitrogen oxides of various forms (referred to as NOx) are irradiated with an ionizing radiation to form aerosol. The aerosol is collected by a collecting means to form a collected material containin... | 09/21/1976 |
| 3974258 | Process for purifying a sulfur dioxide containing gas A sulfur dioxide containing gas is purified by successive contact with an ammonia solution and then a dilute ammonium sulfite solution; the latter solution is regenerated by electrodialysis while the ammonia solution, after SO2 absorption, is v... | 08/10/1976 |
| 3960687 | Electrostatically enhanced removal of sulfur dioxide from gaseous carriers Closed circuit process for effecting the selective removal of sulfur dioxide values from industrial waste gases or the like wherein a particularly constituted confined solution of mixed ammonium phosphates is exposed to absorbent contact with a sulfur dio... | 06/01/1976 |
| 3961019 | Method for purification of exhaust gases A method for purification of exhaust gases, which consists of a first purification process comprising making a liquid alkaline chemical react on the exhaust gas thereby to recover nitrogen oxides contained in said exhaust gas as a precipitate together wit... | 06/01/1976 |
| 3943228 | Process for efficiently purifying industrial gas Sulfur dioxide and ammonia remaining in waste-gas after partial purification thereof, for example by means of ammonia or ammonium sulfite solutions, are withdrawn from said gas by washing with a diluted aqueous solution of ammonium sulfate; the resulting ... | 03/09/1976 |
