Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7361209 | Apparatus and process for preparing sorbents for mercury control at the point of use A system for treating a contaminated gas stream is provided that includes a comminution device 204 operable to effect size reduction of a plurality of sorbent particles and form a plurality of comminuted particles, a plurality of nozzles 224 distribute... | 04/22/2008 |
| 7351387 | Method for removing impurities accumulated in a scrubbing fluid A method for removing impurities accumulated in a scrubbing fluid in a flue gas scrubber and effluents from the scrubber. The flue gases are scrubbed with a scrubbing fluid that includes a calcium-containing absorbent. The scrubbing fluid containing gypsum and other... | 04/01/2008 |
| 7332143 | Targeted duct injection for SOcontrol NOx and SO3 emissions from combustion of a sulfur containing carbonaceous fuel are reduced simultaneously. The combustion gases comprising NOx and SO2 are mixed with a NOx control agent into the combustion gases... | 02/19/2008 |
| 7141220 | Open system sulphurous acid generator This invention presents a sulphurous acid generator which employs a combination of novel blending, contact and mixing mechanisms which maximize the efficiency and duration of contact between sulphur dioxide gas and water to form sulphurous acid in an open nonpressur... | 11/28/2006 |
| 7048781 | Chemically-impregnated silicate agents for mercury control The present invention is directed to a contaminant removal agent comprising a polyvalent metal sulfide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered sil... | 05/23/2006 |
| 7037434 | Integrated water treatment and flue gas desulfurization process A water stream containing hardness minerals is subjected to a water treatment process using an alkali agent to precipitate the hardness minerals and to produce a softened water stream is used to create an integrated water treatment and flue gas desulfurization proce... | 05/02/2006 |
| 7037474 | Use of sulfide-containing liquors for removing mercury from flue gases A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions m... | 05/02/2006 |
| 6942840 | Method for removal and stabilization of mercury in mercury-containing gas streams The present invention is directed to a process and apparatus for removing and stabilizing mercury from mercury-containing gas streams. A gas stream containing vapor phase elemental and/or speciated mercury is contacted with reagent, such as an oxygen-containing oxid... | 09/13/2005 |
| 6939523 | Method of removing SO3 from flue gases A calcium hydroxide slurry is injected into the off gases in the exhaust duct of an industrial plant which burns sulfur containing fuels. The calcium hydroxide slurry reacts with SO3 produced as a result of the combustion process and forms a primary solid... | 09/06/2005 |
| 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 |
| 6099816 | Process for desulfurizing a sulfur-dioxide containing gas A desulfurization process using magnesium sulfites in a clear solution has the discharge from a wet scrubbing unit passed to a reaction tank. A silica-containing solid particulate material, such as sand, is added to the reaction tank and lime is added to ... | 08/08/2000 |
| 6096280 | Natural gas treatment process Hydrogen sulfide is removed from gas streams by reaction with sulfur dioxide in an autogeneously-formed aqueous acid medium according to the equation: SO2 +2H2 S.fwdarw.2H2 O+3S the sulfur being removed from the aqueous ph... | 08/01/2000 |
| 5718872 | Apparatus for controlling the hydrogen sulfide concentration in the acid gas feedstock of a sulfur recovery unit An apparatus for controlling the hydrogen sulfide concentration in an acid gas stream and the hydraulic loading of a sulfur recovery unit of the type having an absorber for contacting a sour gas stream with an absorbent, a regenerator for regenerating the... | 02/17/1998 |
| 5705046 | Process for treating effluent from flue-gas desulfurization system and apparatus therefor A process for treating effluent from a flue-gas desulfurization system wherein the resulting gypsum is removed, comprises filtering the gypsum and fly ash free effluent by a filter, transferring the filtrate to an electrodialyzer wherein cation-exchange m... | 01/06/1998 |
| 5651948 | Low pressure drop, turbulent mixing zone dry scrubber Contaminants such as sulfur oxides are removed from flue gas in a low pressure drop, turbulent mixing zone, vertical dry scrubber by channeling the flue gas through a low pressure drop gas distribution means which controls flue gas introduction to the scr... | 07/29/1997 |
| 5645807 | Magnesium-enhanced sulfur dioxide scrubbing with gypsum formation A wet scrubbing method for removal of sulfur dioxide from a gaseous stream uses a magnesium-enhanced lime scrubbing aqueous slurry, where a solids content in the aqueous slurry in a wet scrubbing unit is maintained at an amount of between 13 to 20 percent... | 07/08/1997 |
| 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 |
| 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 |
| 5348715 | Processes to remove acid forming gases from exhaust gases The present invention relates to a process for reducing the concentration of NO in a gas, which process comprises: (A) contacting a gas sample containing NO with a gaseous oxidizing agent to oxidize the NO to NO2 ; (B) contacting the gas sample of s... | 09/20/1994 |
| 5298228 | Method and apparatus for treating hydrocarbon gas streams contaminated with carbonyl sulfide An improved method of reducing the concentration of carbonyl sulfide in a hydrocarbon gas containing carbonyl sulfide, which method comprises (a) feeding the hydrocarbon gas containing carbonyl sulfide to a hydrolysis section to contact the hydrocarbon ga... | 03/29/1994 |
| 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 |
| 5100633 | Method for scrubbing pollutants from an exhaust gas stream Method of treatment of a hot exhaust gas stream containing acid forming pollutants to produce a scrubbed exhaust and useful or benign by-products. The gas stream is first passed through a heat exchanger and then reacted with an aqueous, alkaline scrubbing... | 03/31/1992 |
| 5082639 | Sulfur dioxide removal from gases using a modified lime A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by mixing lime with water containing a calcium sulfur-oxide salt... | 01/21/1992 |
| 5066470 | Cyclic process for the removal of sulfur dioxide and the recovery of sulfur from gases In accordance with the invention, gases containing sulfur dioxide are passed through a solution rich in ferric iron and containing barium chloride or calcium chloride. Sulfur dioxide is oxidized by the ferric ion to sulfur trioxide when then forms sulfuri... | 11/19/1991 |
| 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 |
| 5047221 | Processes for removing sulfur from sulfur-containing gases 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 |
| 5041274 | Method and apparatus for cooling, neutralizing, and removing particulates from the gaseous products of combustion The present invention discloses a method and apparatus for cooling and removing the toxic particulates, heavy metals, noxious fumes, and acid from the gaseous products of the combustion of materials high in impurities and/or toxic substances. Said inventi... | 08/20/1991 |
| 5039499 | Process for desulfurization of sulfur dioxide-containing gas streams A process for desulfurizing sulfur dioxide-containing gases wherein the sulfur-containing gases are contacted with an aqueous solution of magnesium hydroxide in a wet scrubber, wherein magnesium sulfite and magnesium bisulfite are formed, a portion of spe... | 08/13/1991 |
| 5034204 | Flue gas desulfurization process A wet, calcium-based, flue gas desulfurization process for reliably and cost effectively removing sulfur dioxide from the flue gas generated by the combustion of fossil flues containing sulfur includes the step of contacting the combustion flue gas prefer... | 07/23/1991 |
| 5017349 | Method for desulfurization of flue gases A system for the removal of sulfur compounds from the flue gas from a high-sulfur coal combustion unit. The flue gas is contacted with a combination of a calcium hydroxide slurry and gaseous ammonia in a combined stoichiometric ratio which provides for ne... | 05/21/1991 |
| 4994246 | Method for removing sulfur oxides from combusting gases in wet, calcium-based flue gas desulfurization processes A method is provided for improving the reliability, SO2 removal and thiosulfate utilization in a wet lime/limestone flue gas desulfurization process by contacting the combustion gases in the presence of the wet lime or limestone with thiosulfat... | 02/19/1991 |
| 4963329 | Gas reacting apparatus and method Gas reacting apparatus and method are described for wet mass transfer of solute gases from a gas stream with a liquid or slurry reacting medium capable of chemisorption of solute gases in the gas stream. The apparatus comprises an elongated conduit defini... | 10/16/1990 |
| 4957716 | Method for removal of SO2 and NOx from combustion gases by metal chelation and thermal reduction A process is provided for removing nitrogen oxides and sulfur dioxide from gaseous mixtures in the presence of a metal chelating agent. These gaseous contaminants are converted to hydroxylaminedisulfonates which are decomposed to ammonium ions and sulfate... | 09/18/1990 |
| 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 |
| 4911901 | Wet desulfurization process for treating a flue gas A process for treating a flue gas containing sulfur dioxide and fly ash is disclosed in which an aqueous absorbent liquid is sprayed into the glue gas stream, and the resulting gas is fed to a vertical, open-ended pipe to form a jet annular stream, so tha... | 03/27/1990 |
| 4871522 | Combined catalytic baghouse and heat pipe air heater A method and apparatus for controlling emissions of a coal fired boiler includes a hot catalytic baghouse for receiving flue gases along with injected ammonia and alkali. The alkali and ammonia react with SOx and NOx in the flue gas ... | 10/03/1989 |
| 4859440 | Method of treating flue gases and combustion residues The alkalinity of the solids, slag and ash, which occur in a combustion plant such as an incinerator is utilized for the flue gas scrubber, while at the same time the storability and the alkaline flue gas washing stage are improved. For this purpose, the ... | 08/22/1989 |
| 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 |
| 4830733 | Integrated process for the removal of sulfur compounds from fluid streams The present invention relates to a new and integrated process involving the utilization of a primary adsorption bed containing a regenerable, physical adsorbent and an auxiliary sorption bed containing a chemisorbent for the removal of sulfur compounds fr... | 05/16/1989 |
| 4818506 | Gypsum scale inhibitors for flue gas desulfurization systems Gypsum scale inhibitors useful under wet flue gas desulfurization (FGD) scrubber temperature and pH conditions. The gypsum inhibitors advantageously prevent or minimize gypsum scale formation and crystal growth in mist eliminator wash water and in the scr... | 04/04/1989 |
