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7718151 |
Methods and systems for deacidizing gaseous mixtures
An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased...
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7541011 |
Phase transitional absorption method
The present invention is directed to an improved method and system for separating and purifying gas using gas-liquid absorption. According to this invention, the method is carried out in an...
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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...
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7214358 |
Low energy regenerable SO2 scrubbing 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...
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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...
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5958335 |
Method and apparatus for preventing corrosion of exhaust gas treatment systems
A corrosion preventive method and an apparatus for preventing corrosion of stainless steel components in an exhaust gas desulfurizing apparatus of an exhaust gas treatment system comprising the...
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5609841 |
Method and apparatus for treating a flow of gas containing oxidized sulphur compounds
A method of treating a flow of gas containing oxidized sulphur compounds, such as an exhaust gas from coal combustion, comprising the steps of (i) treating the flow of gas to obtain a first...
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5486342 |
Clear liquor scrubbing of sulfur dioxide with forced oxidation in flue gas desulfurization system
A flue gas desulfurization process and system employing a clear scrubbing liquor and an organic acid buffer conducted under forced oxidation conditions to produce a usable gypsum by-product without...
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5122352 |
Heat exchanger and pollutant removal system
A system for cooling flue gases from a fossil fuel boiler plant, and removing pollutants from the flue gas, is disclosed. In a first section of the apparatus, heat exchange cools the flue gas to...
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5075085 |
Desulfurizing method for exhaust gas from combustor
A method and equipment for desulfurizing exhaust gas from a combustor in which the exhaust gas containing SO2 from the combustor is brought into contact with SO2 absorbent to remove SO2 and is...
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5061467 |
Economic recovery and utilization of boiler flue gas pollutants
Improved methods and apparatus for removing unwanted pollutants from flue gases are disclosed. A sequence of at least three vertical beds of particulates is disposed in the flue gas exhaust duct. A...
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5028310 |
Reduction of SOx in regenerator off gas of a fluid cracking unit
SOx in regenerator off gas in a fluid cracking unit is decreased by providing in the regenerator bed, a metal grid bearing a layer of rare earth oxide.
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5023064 |
Method for removing sulfur oxide
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...
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5007999 |
Method for reducing sulfur oxide emission during an FCC operation
A process for reducing sulfur oxides production during an FCC cracking operation comprises the steps of: (a) passivating metal contaminants on an FCC catalyst by contacting the FCC catalyst with a...
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4986966 |
Retrofit flue gas scrubber system
A scrubber module (16) of the wet type includes a partition (26) extending across the upper end of a tank (20) between the dirty flue gas inlet (28) and the clean flue gas outlet (30). The...
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4943422 |
Process for treatment of gaseous effluents containing sulfur dioxide with oxygen
A method and apparatus are provided for treating gaseous effluents containing sulfur dioxide. Sulfur dioxide is oxidized by oxygen in a concentrated sulfuric acid medium in the presence of a...
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4931263 |
Wet-process stack gas purification method
A wet-process stack gas purification method and apparatus wherein stack gas is scrubbed by bubbling it into a first scrubbing liquid while maintaining the level of the first scrubbing liquid. The...
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4917875 |
Gas/solid contact method for removing sulfur oxides from gases
An improved continuous cyclic process for removing oxides of sulfur from a waste gas with a regenerable particulate adsorbent in which hot adsorbent particles pick up SOx in a first fluid transport...
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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...
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4874591 |
Process for the purification of waste gases containing hydrochloric acid and sulphur dioxide
In a process for the purification of waste gases containing hydrochloric acid and sulphur dioxide obtained from incinerating plant, in particular refuse incinerating plant, hydrochloric acid and...
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4861577 |
Method for removing the sulphur content of a weak gas containing sulfur dioxide
The invention relates to a method for cleaning exhaust gases weak in sulphur dioxide, or sulphur dioxide and hydrogen sulphide. In order to remove the sulphur content of an exhaust gas, the exhaust...
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4832936 |
Process for making calcium sulfate dihydrate or gypsum
A process is described for making flue gas gypsum from desulfurization of power plant exhaust gas. The process comprises treating the flue gas in a wash tower with a wash water suspension...
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4831207 |
Chemical processing with an operational step sensitive to a feedstream component
The present invention relates to a chemical process involving a processing step which is sensitive to the presence of at least one component contained within the stream to be processed and to an...
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4666694 |
Method for treating by-products from flue gas
A dry particulate sulfite-containing material produced in a flue gas desulfurization process is oxidized and agglomerated in a fluidized bed reactor, wherein the material is fluidized in an...
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4552735 |
Process for removing total reduced sulfur compounds from industrial gases using manganese dioxide
A process and apparatus for removing total reduced sulfur compounds (TRS), especially H2 S and mercaptans from industrial gases is disclosed wherein an aqueous suspension of an active manganese...
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4446010 |
Fluid catalytic cracking
A fluid catalytic cracking process for sulfur-containing petroleum charge stocks wherein sulfur contained in coke deposited on the fluidized cracking catalyst in the reactor is converted to sulfur...
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4396594 |
Sulfur dioxide reduction process
Sulfur dioxide is converted to elemental surfur by reduction with a carbonaceous material in a reaction zone containing a molten salt. Heat is provided by reacting a portion of the carbonaceous...
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4374812 |
Process for stack gas treatment
A wet process for stack gas treatment wherein the stack gas is scrubbed with a suspension containing calcium hydroxide and/or calcium carbonate to remove sulfur oxides from the gas, characterized...
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4325811 |
Catalytic cracking with reduced emission of noxious gas
A process for the control of sulfur oxide emissions from the regenerator of a fluid catalytic cracking unit which involves circulating solid particles through the process cycle which comprise...
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4284608 |
Process for regenerating sulfur dioxide gas scrubbing solutions
It is known to remove sulfur dioxide from gas streams, particularly waste or flue gases, by contact with aqueous scrubbing solutions containing a metal salt, such as ferric sulfate, in which the...
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4283374 |
Regenerable manganese oxide hot gas desulfurization process
A continuous regenerative process for desulfurizing a hot reducing gas is disclosed. The gas is scrubbed by a sorbent containing MnO and Mn3 O4. The spent sorbent is regenerated by reacting the MnS...
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4248842 |
Removal of contaminants and recovery of by-products from hot waste gas stream
A process for the removal of sulfur dioxide and other contaminants and the recovery of ammonium sulfate as a by-product from a hot waste gas stream comprising cooling the waste gas stream to a...
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4235853 |
Method for sulfur dioxide control II
A method and apparatus for removing sulfur dioxide from a gas stream such as a stack gas stream utilizing an aqueous slurry of manganous hydroxide as an absorbant and utilizing a regeneration of...
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T998010 |
Process for removal of sulfur dioxide from gases
An improvement is provided in the regeneration system of agueous regenerative processes for the removal of SO2 from SO2 -containing gas streams which have a scrubbing system containing (1) a...
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4201753 |
Flue gas desulfurization process
A method of desulfurizing carbonaceous fuel, such as coal and oil containing sulfur. The fuel is ignited in a boiler combustion zone and a saturated solution of potassium carbonate and potassium...
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RE29813 |
Process for the removal of sulfur oxide from waste gas
A process, in which sulfur dioxide gas contained in waste gas is removed therefrom and collected as gypsum. In said process, the waste gas is subjected to a flow of detergent solution of basic...
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4081522 |
Regeneration of sulfated metal oxides and carbonates
Alkali metal or alkaline earth metal carbonates such as calcium carbonate and magnesium carbonate found in dolomite or limestone are employed for removal of sulfur dioxide from combustion exhaust...
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4014978 |
Air pollution control system and method
A system and method are described in which sulfur-containing flue gases are contacted with a solution containing excess calcium or magnesium bicarbonate. The sulfur oxides are reacted with the...
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4008310 |
Regenerative sulfur dioxide scrubbing system
An aqueous regenerative SO2 scrubbing system is provided which has a scrubbing loop and a regeneration loop. The scrubbing loop contains a scrubber through which a thiosulfate-rich aqueous solution...
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3939251 |
Regeneration method for gas treating apparatus
A method of desulphurization of a flue gas comprising passing a flue gas to a plurality of adsorption beds each having an activated carbon layer packed therein thereby separating a sulphur oxide...
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3916025 |
Removal of sulfur dioxide and/or trioxide from gaseous effluents of fossil fuel operated power and steam plants
This invention relates to the removal of sulfur dioxide (SO2) and/or sulfur trioxide (SO3) from the gaseous effluents of fossil fuel burning steam and power plants using certain macroreticular,...
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3870781 |
Air pollution control system
An air pollution control system for treating the flue gases from a fossil fuel fired furnace scrubs the gases with a solution of NaOH whereby Na+ and HSO3 - are formed in solution. The HSO3 - is...
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3859416 |
SCRUBBING A GAS STREAM CONTAINING SO AND O WITH AN ABSORBENT CONTAINING A REDUCING AGENT
An input gas stream containing SO2 and O2 is continuously treated in order to remove a substantial portion of the SO2 therefrom by the steps of: (a) scrubbing the input gas stream with an aqueous...
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3645671 |
FLUE GAS DESULFURIZATION WITH AMMONIUM SULFITE
Flue gas is desulfurized by absorption in aqueous ammonium sulfite in a multiple-stage countercurrent absorber. The absorber effluent solution is regenerated by acidifying a portion thereof with...
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3551108 |
CARBON OXIDE REGENERANT FOR SULFUR PRODUCTION
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3547583 |
PROCESS FOR THE ENTRAPMENT OF SULFUR DIOXIDE GAS
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3542511 |
REMOVAL OF SULFUR DIOXIDE FROM WASTE GASES
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3516796 |
CARBONACEOUS PROCESS FOR SULFUR PRODUCTION
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3503185 |
PROCESS FOR THE RECOVERY OF SULFUR DIOXIDE IN RESIDUAL GASES
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3574544 |
SINGLE-STAGE PROCESS FOR RECOVERING SULFUR VALUES
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