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4585631 Method for the conversion of nitrogen oxides contained in gaseous products of combustion  
A reducing agent such as preferably ammonia (NH3) is blended in a reaction chamber with gaseous products of combustion for the conversion of the nitrogen oxides (NOx) contained in the products of...
4584465 Method and apparatus for heating process air for industrial purposes  
A method and an apparatus are disclosed for heating process air for industrial purposes to a predetermined temperature. In one embodiment, the method comprises passing a first air-flow portion...
4565678 Method of reducing sulfur oxide and nitrogen oxide content of flue gas  
Flue gas is treated by a regenerable wet scrubbing process to reduce sulfur- and nitrogen oxides by reacting with a solution containing ammonium thiosulfate and hydroxide, and a ferrous chelating...
4564510 Method for removing nitrogen oxides from waste gases  
A method is provided for removing nitrogen oxides from waste gases, said method comprising the steps of oxidizing the nitrogen oxides in the waste gases by contacting the waste gases in a gas...
4562052 Process for the removal of nitrogen oxides from nitric acid plant tail gas  
The present invention involves a process for removing nitrogen oxides from an off gas stream, such as nitric acid plant tail gas. The off gas is scrubbed with concentrated nitric acid to remove...
4562053 Process of cleaning flue gases from heating plants  
By a process of cleaning flue gases, both solid particles and nitrogen oxides and sulphur dioxide are removed from the flue gas prior to the discharging into the atmospheric air. In order to...
4541999 Method for removing acidic components including nitrogen oxide from waste gases  
A method of simultaneously removing SOx and NOx from waste gases. Using a known desulfurization process the waste gases free of the acidic components are contacted with an oxidizing agent in the...
4540554 Removal of Sox, Nox, and particulate from combusted carbonaceous fuels  
The invention is a method for removing sulfur oxides, nitrogen oxides and particulate from the products of combusted carbonaceous fuels. Sulfur oxides, nitrogen oxides and particulate are...
4530820 Deaeration of water  
Seawater which is to be used as injection water in underground oil reservoirs to obtain a higher degree of hydrocarbon recovery deoxygenated by a new and improved process that eliminates the...
4525142 Process for treating flue gas with alkali injection and electron beam  
A process uses limestone injection into a combustion boiler burning pulverized coal or liquid hydrogen fuel. Effluent gas from the boiler is humidified and cooled to below 200° F. During the...
4521388 NOx reduction in flue gas  
A selective catalytic reduction process (SCR) for reducing the oxides of nitrogen (NOx) content of a furnace flue gas. The process comprises splitting the flue gas into two streams, treating one...
4521389 Process of controlling NOx in FCC flue gas in which an SO2 oxidation promotor is used  
NOx in flue gas from a regenerator in which an SO2 oxidation promoter is present is controlled by mixing ammonia with flue gas and passing the mixture through a combustion zone.
4519993 Process of conversion for disposal of chemically bound nitrogen in industrial waste gas streams  
An improved process for disposal of chemically bound nitrogen in industrial waste streams is provided wherein a effluent stream containing chemically bound nitrogen, such as ammonia stream, is...
4500501 Method of removing sulfur oxides and nitrogen oxides by dry process  
This invention relates to a method of removing sulfur and nitrogen oxides by a dry process comprising passing a waste gas through a moving bed formed of a carbonaceous adsorbent in a direction...
4482527 Process for removing nitrogen dioxide from off-gas  
The disclosure relates to a process for removing nitrogen dioxide from off-gas. To this end, the disclosure provides for the off-gas to be intimately contacted with a suspension consisting of red...
4478801 Method for purifying exhaust gases with hydrogensulfates  
A process for purifying exhaust gases is disclosed. Exhaust gases discharged when coal or petroleum is burned are forced to pass through reaction media consisting of molten salts whose major...
4473537 Ammonia control system for NOx emission control for gas turbine exhaust  
A steam and gas turbine combined cycle plant STAG* employs a catalyst in a heat recovery steam generator to react injected ammonia with NOx from the combustor of the gas turbine to reduce...
4473536 Catalytic pollution control system for gas turbine exhaust  
A steam and gas turbine (STAG) plant employs a catalyst in a heat recovery steam generator to react injected ammonia with NOx from the combustor of the gas turbine to reduce atmospheric emission...
4462911 Detoxification or decontamination of effluents and/or flue gases  
This invention provides a process for detoxifying or decontaminating liquid effluents and/or waste gas containing poisonous chromium (VI) NOx by reacting these with each other with formation of...
4460552 Process for the separation of air components, such as difficultly absorbable air impurities, out of air-gas mixtures  
The present invention provides an apparatus and process for separating and removing chemical impurities from air which impurities are difficult to absorb. The apparatus for carrying out the...
4454100 Condensation process for separating air pollutants from waste gases, and specifically from flue gases  
A condensation process for separation of air pollutants from waste gases and, specifically, from flue gases. Sulfurous components of the waste gases in particular, but also heavy metals contained...
4444736 Process for removing SO2 and NOx from gases  
A process for removing SO2 and NOx from waste gas and recovering sulfur comprising scrubbing the waste gases with a water slurry of FeS in the presence of FeSO4 and Na2 SO4. SO2 is captured by the...
4442079 Process for removal of nitrogen oxides and sulfur oxides from waste gases  
A process for removal of nitrogen oxides and sulfur oxides from waste gases by contacting the waste gases with a particulate material comprising an alkaline earth based absorbent for sulfur...
4442080 Fluid bed SOX/NOX process--"hydrated calcine absorption"  
A process for simultaneous removal of sulfur oxides (SOx) and nitrogen oxides (NOx) from gaseous mixtures (such as flue gases and industrial waste gases) containing them which comprises contacting...
4438082 Platinum gold catalyst for removing NOx and NH3 from gas streams  
Selective reduction of NOx with NH3 as well as decomposition of excess NH3 is provided over a wide temperature range by a platinum-gold catalyst.
4434147 Simultaneous sulfur oxide and nitrogen oxide control in FCC units using cracking catalyst fines with ammonia injection  
Sulfur oxide and nitrogen oxide control by use of a sulfur sorbent and sulfur dioxide oxidation promoter in the regenerator and downstream removal of nitrogen oxides by selective catalytic...
4426364 Removal and recovery of nitrogen oxides and sulfur dioxide from gaseous mixtures containing them  
A cyclic process for removing lower valence nitrogen oxides from gaseous mixtures includes treating the mixtures in a first stage with an acidic aqueous media including a peroxygen oxidant to form...
4425313 Removal and recovery of nitrogen and sulfur oxides from gaseous mixtures containing them  
A cyclic process for removing lower valence nitrogen oxides from gaseous mixtures includes treating the mixtures with an aqueous media including alkali metal carbonate and alkali metal bicarbonate...
4423017 Process for reducing NO emissions  
Disclosed is an improved non-catalytic combustion process for reducing NO emissions to the atmosphere wherein a reducing gas comprising ammonia, either alone or in combination with one or more...
4419333 Process for removal of nitrogen oxides  
To remove nitrous gases from gas mixtures there is needed a process and apparatus by which they can be eliminated quickly, without formation of secondary waste and as cheaply as possible. This is...
4418044 Nitric oxide and sulfur oxide absorption by scrubbing with Fe++ /S O3-  
A method of scrubbing a gaseous mixture comprising NO and SO2 said method comprising providing a scrubbing solution, said scrubbing solution comprising a solvent and a solute wherein said solute...
4405587 Process for reduction of oxides of nitrogen  
An improved process for reducing the concentration of oxides of nitrogen (NOx) in a waste stream is provided wherein an effluent stream containing oxides of nitrogen (NOx) is burned at a...
4400362 Removal of nitrogen oxides from gas  
Gas containing nitrogen oxides is treated in two separate stages. In the first stage, the nitrogen oxides in the gas are reacted with sulfurous acid. The gaseous product of this reaction is...
4389382 Method of using a simplified low cost catalyst system  
There is disclosed a method of using an exhaust gas catalyst for treatment of exhaust gases developed by burning a hydrocarbon based fuel in an internal combustion engine. These exhaust gases...
4388281 Noxious-component removal from flue gas and compositions useful therefor  
By separating a noxious-component-containing flue gas into two separate streams, subjecting one of these streams to dry purification and the other to wet purification, and recombining the...
4387082 Removal of nitrous oxide from exit gases containing this compound during the production of hydroxylammonium salts  
A process for removing nitrous oxide from exit gases which contain this compound and have been obtained in the preparation of hydroxylammonium salts by catalytic reduction of nitric oxide with...
4376759 Cyclic process for making hydrogen  
Nitric oxide, an odd-electron molecule, has been found to react with m-phosphoric acid to displace hydrogen and form nitrosyl m-phosphate. The addition of water to the nitrosyl salt regenerates...
4375455 Method and apparatus for cooling and neutralizing acid gases  
A process and apparatus for neutralizing hot acid gases is disclosed. Prior to neutralizing the gas, it is introduced into a zone, e.g., a cyclone to establish an upwardly, generaly spiral gas...
4372770 Melting glass with two stage NOx control  
Afterburning is employed with selective, non-catalytic reduction by ammonia injection to reduce NOx emissions of a process furnace, especially a glass melting furnace.
4369167 Process for treating stack gases  
Stack gases containing pollutant gases and particulate matter are passed through a defined flow path into which at least one selected liquid reagent is introduced in a prescribed manner to...
4368057 Method for reducing ammonia concentration in pre-combusted fuel gas using nitric oxide  
Processes for converting NH3 contaminants of gaseous fuel to N2. The processes involve reacting gaseous fuel containing NH3 with a sufficient amount of NO at a temperature and for a time...
4351811 Process for reducing an eliminating nitrogen oxides in an exhaust gas  
The concentrations of NO and NO2 in nitrogen oxides contained in an exhaust gas are adjusted to substantially equal mol concentrations, whereupon the exhaust gas is held in contact with a metallic...
4351810 Method for removing sulfur dioxide from a gas stream  
A method is provided for removing SO2 from gas streams by its gas-phase reaction with a stabilized Criegee intermediate under conditions where a very large excess of water vapor is avoided,...
4350669 Process for controlling nitrogen oxides in exhaust gases  
A process for controlling nitrogen oxides in combustion exhaust gases which comprises adding an oxygen-containing hydrocarbon and/or its precursor to exhaust gases and thereby oxidizing nitric...
4349453 Method for processing alkaline solutions containing radioactive iodine during reprocessing of nuclear fuels  
The method of processing alkaline solutions containing radioactive iodine consists in dissolving irradiated fuels in a nitric acid solution. The vapors constituted essentially by nitrogen oxides,...
4341618 Process for the liquefaction of solid carbonaceous materials wherein nitrogen is separated from hydrogen via ammonia synthesis  
In a process for the liquefaction of solid carbonaceous materials wherein bottoms residues are upgraded with a process wherein air is employed, the improvement wherein nitrogen buildup in the...
4341747 Process of removing nitrogen oxides from gaseous mixtures  
Nitrogen oxides are removed from gaseous mixtures by treatment with an aqueous solution of nitric acid having a concentration by weight from about 35% to about 58% and containing by weight at...
4340572 Process for recovering heat from stack or flue gas  
A method and apparatus for efficiently recovering heat from a gas stream such as discharged flue gas. The gas stream is countercurrently contacted with a liquid medium in two stages. A first...
4335084 Method for reducing NOx emissions from combustion processes  
The present invention relates to a method for the noncatalytic reduction of NOx in combustion gases which method includes maintaining an excess of fuel to air during combustion, cooling the...
4334060 Reactor for the gas phase nitration of cellulose  
A continuous process is provided for the vapor phase nitration of cellulose n a novel reactor having a gas tight housing containing a table with a perforated surface. Cellulose in porous sheet...