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8529855 Methods and system for removing gas components from flue gas  
A method for removing gas components SOx, NOx, and CO2 from a flue gas, comprises the steps of contacting the flue gas successively with first, second and third liquid mediums each of which...
6197269 Method for absorbing gaseous oxidizable or reducible constituents through a membrane  
Membrane gas adsorption is conducted wherein the gas phase contains mercury in the gaseous state and the liquid phase containing at least one oxidizing agent for mercury such that the mercury in...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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: SO2 +Br2 +2 H2 O➝H2 SO4 +2 HBrThe hydrobromic acid thus formed is split up by...
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...
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...
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...
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...
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...
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.
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
3907520 Electrostatic precipitating method  
An electrostatic precipitating method which includes moving a gas stream with charged particles entrained therein along a prescribed path and imposing an electrostatic force field on the charged...
3869255 Closed loop reflux system  
Sulfur isotopes are continuously separated and enriched using a closed loop reflux system wherein sulfur dioxide (SO2) is reacted with sodium hydroxide (NaOH) or the like to form sodium hydrogen...
3856476 HIGH VELOCITY WET ELECTROSTATIC PRECIPITATION FOR REMOVING GASEOUS AND PARTICULATE CONTAMINANTS  
A wet electrostatic precipitator including at least one annular gas passage defined by concentrically arranged collector tubes have liquid distributors mounted thereabove to produce...
3770385 APPARATUS FOR REMOVAL OF CONTAMINANTS ENTRAINED IN GAS STREAMS  
An incinerator generally including a combustion chamber, a flue and an apparatus intercommunicating the combustion chamber and the flue, for removing solid and gaseous contaminants from the...
3765153 APPARATUS FOR REMOVING CONTAMINANTS ENTRAINED IN A GAS STREAM  
An incinerator generally including a combustion chamber, a flue, means for conducting combustion gases emanating from the combustion chamber to the flue, the conducting means including passage...
3745751 SULFUR DIOXIDE COLLECTION SYSTEM  
A sulfur dioxide collection system comprising ozone-producing electrodes upstream from a baghouse, electrostatic precipitator, or scrubber, etc., whereby ozone is produced and simultaneously...
3655547 ELECTROCHEMICAL CELL HAVING A BIPOLAR ELECTRODE  
An electrochemical cell is disclosed which comprises a bipolar electrode having two spaced surfaces adapted for exposure to an oxidizing agent and a reducing agent, respectively. The two electrode...
3531664 MEANS FOR AND METHOD OF REMOVING POLLUTANTS FROM PRODUCTS OF COMBUSTION  
3524801 PROCESS FOR PRODUCING SULFURIC ACID FROM SO2 CONTAINING WASTE GAS  
3523755 PROCESSES FOR CONTROLLING THE PH OF SULFUR DIOXIDE SCRUBBING SYSTEM  
3515513 CARBONATION PROCESS FOR SO2 REMOVAL  
3783116 DECOMPOSITION OF CARBONYL SULFIDE (COS)IN ELECTRIC CHARGE  
3782905 ELECTROSTATIC PRECIPITATING APPARATUS AND METHOD  
3475122 RECOVERY OF SULFUR DIOXIDE FROM GAS STREAMS  

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