Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7419646 | Method of deacidizing a gas with a fractional regeneration absorbent solution The gaseous effluent flowing in through line 1 is contacted in absorption zone ZA with the liquid absorbent solution flowing in through line 9. The gaseous effluent depleted in acid compounds is discharged through line 2. The absorbent solution ... | 09/02/2008 |
| 7255842 | Multi-component removal in flue gas by aqua ammonia A new method for the removal of environmental compounds from gaseous streams, in particular, flue gas streams. The new method involves first oxidizing some or all of the acid anhydrides contained in the gas stream such as sulfur dioxide (SO2) and nitric o... | 08/14/2007 |
| 7244405 | Method for cleaning coke oven gas A method for cleaning coke oven gas by washing the gas, whereby a washing liquid is guided into a washing liquid circuit and impurities in the washing liquid are expelled in a desorber. According to the invention, the coke oven gas is washed with caustic soda in a c... | 07/17/2007 |
| 7223375 | Emission control systems and methods thereof A method and system for controlling one or more emissions includes introducing ammonia to react with at least a portion of sulfur trioxides in an exhaust emission and result in at least one or more ammoniated compounds. At least a portion of fly ash particles and th... | 05/29/2007 |
| 7214358 | Low energy regenerable SOscrubbing process Sulphur dioxide is removed from gas streams by contacting the gas stream with an absorbing medium containing an amine capable of forming an amine salt, heat stable salt and sulfite. The level of heat stable salt is selected such that during the regeneration process ... | 05/08/2007 |
| 7179438 | Methods and apparatus for recovering gypsum and magnesium hydroxide The present invention provides methods and apparatus for treating flue gas containing sulfur dioxide using a scrubber, and more particularly relates to recovering gypsum and magnesium hydroxide products from the scrubber blowdown. The gypsum and magnesium hydroxide ... | 02/20/2007 |
| 7160460 | System and method for treating wastewater using coir filter A wastewater treatment system includes a septic tank having a discharge in flow communication with one or more biofilter containers having filter media therein. Wastewater or effluent from the septic tank is allowed to contact the filter media and each container inc... | 01/09/2007 |
| 7117046 | Cascaded control of an average value of a process parameter to a desired value At least one of the multiple process parameters (MPPs) is a controllable process parameter (CTPP) and one is a targeted process parameter (TPP). The process also has a defined target limit (DTV) representing a first limit on an actual average value (AAV) of the TPP.... | 10/03/2006 |
| 7113835 | Control of rolling or moving average values of air pollution control emissions to a desired value A controller directs performance of a process having multiple process parameters (MPPs), including a controllable process parameter (CTPP), a targeted process parameter (TPP), a defined target value (DTV) representing a limit on an actual average value (AAV) of the ... | 09/26/2006 |
| 7052662 | NOx, Hg, and SOremoval using alkali hydroxide A process and apparatus for removing SO2, NO, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an alkali scrubbing so... | 05/30/2006 |
| 7048899 | Removing NOx, SO, and Hg from a gas stream using limestone regeneration A process and apparatus for removing SO2, NO, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an ammonia, ammonium h... | 05/23/2006 |
| 7033565 | Production of sulphuric acid from a feed gas with varying concentration of sulphur dioxide A process for the production of sulphuric acid from a sulphur dioxide containing feed gas with concentration of SO2 fluctuating between 0 and 100 mole % SO2 comprising the steps of contacting the feed gas with an aqueous solution comprising 0â€... | 04/25/2006 |
| 6991771 | NOx, Hg, and SOremoval using ammonia A process and apparatus for removing SO2, NO, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an ammonia scrubbing s... | 01/31/2006 |
| 6936231 | NOx, Hg, and SO2 removal using ammonia A process and apparatus for removing SO2, O, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an ammonia scrubbing so... | 08/30/2005 |
| 6428760 | Method for desulfurizing exhaust gas The present invention relates to the improvement of a replenishment method of a magnesium-based compound and to the improvement of a double decomposition method, which can be used in a magnesium hydroxide desulfurization method. In the improved replenishm... | 08/06/2002 |
| 6416725 | Removal of contaminants from gas streams in rayon production Sulfurous gas streams comprising hydrogen sulfide and carbon disulfide, such as produced as a by-product of the rayon-forming process, are processed to recover the components in a useable form. The gas stream first is contacted with an aqueous sodium hydr... | 07/09/2002 |
| 6372187 | Alkaline sorbent injection for mercury control A mercury removal system for removing mercury from combustion flue gases is provided in which alkaline sorbents at generally extremely low stoichiometric molar ratios of alkaline earth or an alkali metal to sulfur of less than 1.0 are injected into a powe... | 04/16/2002 |
| 6284208 | Method for removing mercury and sulfur dioxide from gases A process is provided for the removal of mercury and sulfur dioxide out a flue gas from, for example, power stations, smelters, waste incineration plants and crematories, by washing the flue gas with an oxidized, chloride-containing washing water, which m... | 09/04/2001 |
| 6156205 | Process for the purification of gases containing hydrogen sulphide A process for scrubbing a gas containing hydrogen sulphide and/or carbonyl sulphide, in which the spent scrubbing liquid is treated with autotrophic sulphide-oxidizing bacteria capable of oxidizing at high pH, and elemental sulphur is obtained, the elemen... | 12/05/2000 |
| 5665317 | Flue gas scrubbing apparatus A spray tower for removing acidic gases and particulate matter from flue gases produced by processing operations of the type carried out in utility and industrial facilities. The spray tower is equipped with a tank that serves as a reservoir for an alkali... | 09/09/1997 |
| 5635149 | Wet scrubbing method and apparatus for removing sulfur oxides from combustion effluents Sulfur oxides (SOx) are scrubbed from combustion effluents with aqueous limestone slurries with greater efficiency and with economies in capital and operating costs. In the preferred embodiment of a single-loop, open-tower countercurrent limest... | 06/03/1997 |
| 5624649 | Process for reduction of sulfur dioxide emission from combustion gases combined with production of potassium sulfate A wet flue gas desulfurization process and system are provided for removing sulfur dioxide from flue gases produced by processing operations of the type carried out in utility and industrial plants. In particular, the desulfurization process utilizes an a... | 04/29/1997 |
| 5618511 | Process for producing ammonium sulfate from flue-gas scrubber waste liquor A flue-gas scrubbing-liquor regeneration process that is based on contacting N-S compounds contained in a flue-gas scrubbing liquor with a lime/limestone solution in a double draw-off crystallizer under suitable pH conditions for precipitating calcium sal... | 04/08/1997 |
| 5614158 | Process for removing sulfur dioxide from gases and producing gypsum and purified magnesium hydroxide In a process for removing sulfur dioxide from a gas stream using an aqueous solution of magnesium scrubbing components and subsequent oxidation of the magnesium sulfite produced which is regenerated by addition of lime, a pure magnesium hydroxide product ... | 03/25/1997 |
| 5605552 | Wet type flue gas desulfurization apparatus A wet type flue gas desulfurization apparatus in which desulfurization of flue gas is carried out through gas/liquid phase contact of flue gas with an absorbent slurry. More particularly, disclosed in a combined absorption tower comprising an absorbent sl... | 02/25/1997 |
| 5510094 | Ammonia-limestone scrubbing with by-product for use in agriculture A method of wet flue gas desulfurization of combustion gases that incorporates both calcium scrubbing with forced oxidation and ammonia scrubbing of the gas in a scrubber tower. The end product or result from such a process is gypsum and ammonia sulfate w... | 04/23/1996 |
| 5439658 | Regenerable magnesium dry scrubbing A method for cleaning a flue gas containing flyash, sulfur dioxide and other contaminants includes providing a slurry source having a slurry of primarily water, magnesium sulfite and magnesium hydroxide along with small quantities of magnesium sulfate and... | 08/08/1995 |
| 5434329 | Treatment of spent refinery caustic A hydrocarbon stream is washed with caustic solution to reactively remove hydrogen sulfide and produce a spent caustic solution containing sulfide reaction products. The spent caustic solution is stripped with concentrated carbon dioxide to reactively rem... | 07/18/1995 |
| 5366716 | Method for recovering sulphur dioxide from the chemical circulation of a sulphate pulp mill Sulphur dioxide is separated from the flue gases of a cellulose pulp mill by absorbing it into a sodium sulphite solution. Sulphur dioxide is regenerated from the sodium bisulphite solution produced by an evaporation-crystallization method utilizing therm... | 11/22/1994 |
| 5320816 | Process for absorption of sulfur dioxide and nitric oxide from flue gas The simultaneous abatement of NO and SO2 in flue gas is provided by an absorption process and apparatus utilizing an absorbent composition comprising an aqueous solution of chelates and sulfite salts. Metal chelates oxidized to an inactive stat... | 06/14/1994 |
| 5308509 | FGD performance enhancement by hydroclone and recycling steps A flue gas desulfurization process wherein the liquid bottoms product from the scrubber tower is subject to forced oxidation in a reaction/oxidation tank. Afterwards, this oxidized bottoms product is delivered to hydroclone means for separation into an ov... | 05/03/1994 |
| 5266285 | Sodium-enhanced lime scrubbing method for removing sulfur dioxide from gaseous streams Sulfur dioxide is removed from a gaseous stream by contact with a lime slurry which contains sulfur to produce thiosulfate ions and 2,000-10,000 ppm of effective sodium ions to effect removal of the sulfur dioxide A bleed stream, removed from the scrubbin... | 11/30/1993 |
| 5213782 | Clear liquor scrubbing magnesium-enhanced lime flue gas desulfurization process An improved magnesium-enhanced lime flue gas desulfurization system and process are provided which produce the high sulfur dioxide removal level of previous magnesium-enhanced lime flue gas desulfurization systems and additionally produce waste solids tha... | 05/25/1993 |
| 5120517 | Process for the removal of sulfur oxides and nitrogen oxides from flue gas A continuous process for removing sulfur oxide and nitrogen oxide contaminants from the flue gas generated by industrial power plants and boiler system burning sulfur containing fossil fuels. The sulfur oxide and nitrogen oxide contaminants removed from t... | 06/09/1992 |
| 5108625 | Process for removing sodium sulfate from aqueous buffer solutions Process for removing sodium sulphate from an aqueous citrate, adipate or phosphate buffer solution used for absorption of SO2 from exhaust gases, by evaporating an aqueous buffer solution at atmospheric pressure at a temperature near its boilin... | 04/28/1992 |
| 5104630 | Processes for removing carbonyl sulfide from hydrocarbon feedstreams Processes are disclosed for purifying hydrocarbon feedstreams, e.g, natural gas, to remove carbonyl sulfide and other acid gases such as carbon dioxide and hydrogen sulfide. The processes employ a conversion step to convert carbonyl sulfide to hydrogen su... | 04/14/1992 |
| 5085843 | Method of desulphurizing hot waste gas A desulphurization process, in which acid components of waste gas are removed by spray drying absorption, using an aqueous suspension of slaked lime or limestone as absorbent with recycling of part of the reaction product to the absorbent, is controlled o... | 02/04/1992 |
| 5084255 | Sulfur dioxide removal process with gypsum and magnesium hydroxide production Sulfur dioxide is removed from flue gases using an aqueous solution of magnesium components in a wet scrubber, with oxidation of a portion of the aqueous discharge from the scrubber. Calcium sulfate is added to the portion of aqueous discharge at the oxid... | 01/28/1992 |
| 5051245 | Ammonia for the desulfurization of sulfur containing gases A process for the reduction of sulfur oxides from flue gases is provided in which ammonia is added to the flue gas to precipitate out (NH4)2 SO4. The (NH4)2 SO4 is collected and can be sold as a... | 09/24/1991 |
| 5047222 | Process for removing sulfur from sulfur-containing gases: high calcium fly-ash The present disclosure relates to improved processes for treating hot sulfur-containing flue gas to remove sulfur therefrom. Processes in accordance with the present invention include preparing an aqueous slurry composed of a calcium alkali source and a s... | 09/10/1991 |
