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8980210 Capture and release of acid-gasses with acid-gas binding organic compounds  
A system and method for acid-gas capture wherein organic acid-gas capture materials form hetero-atom analogs of alkyl-carbonate when contacted with an acid gas. These organic-acid gas capture...
8641922 Regenerable and non-regenerable sorbents for acid gas removal  
A sorbent for removal of acid gas from hydrocarbon gas includes a mixture of dewatered residue obtained from the distillation of ethanol, and an amine.
8269037 Absorption medium for removing acid gases which comprises amino acid and acid promoter  
An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of a) of at least one metal salt of an aminocarboxylic acid, and b) of at least one acid promoter,...
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...
7341701 Method, apparatus and plant for treating culinary gaseous effluents  
A method and apparatus (22) for treating culinary gaseous effluents (Eg) carried in an air extraction duct of a kitchen, the apparatus includes: a unit (24) for storing in liquid form a...
6277344 Simultaneous use of peroxygen and olefin compound in odor reduction  
Disclosed is a process for the treatment of a plant fluid effluent containing odor compounds including an alkyl mercaptan or an alkyl thiol, an amine compound, ammonia, hydrogen sulfide and...
5785841 Method of removing sulfur dioxide and nitrogen oxides from a gaseous stream  
A method for removing sulfur dioxide and nitrogen oxides from a gaseous stream using a magnesium-enhanced lime scrubbing slurry containing a ferrous chelate where oxidized ferrous chelate is...
5733517 Byproduct solids crystal modification with organic acids in wet flue gas desulfurization systems  
A wet, calcium-based flue gas desulfurization process conducted under inhibited oxidation conditions and in the presence of at least one organic acid which both enhances the efficiency of sulfur...
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...
5342592 Lance-type injection apparatus for introducing chemical agents into flue gases  
The removal of sulfur oxides (SOx) and nitrogen oxides (NOx) from combustion effluents is enhanced by the supplying of reactants in a particular distribution pattern in the gas flow. To achieve...
5246471 Method and apparatus for gas liquid contact  
A gas-liquid contact system for absorption of gaseous contaminants in an absorptive liquid where contact is attained by a controlled flow relationship between the gas and the liquid forming a...
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...
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...
4968501 Use of chlorous acid for removing sulfur dioxide from combustion gases  
The present invention describes a novel method of using chlorous acid to remove sulfur dioxide from exhaust combustion gases.
4919904 Primary hindered aminoacids for promoted acid gas scrubbing process  
Disclosed are primary sterically hindered aminoacids for use as promoters for alkali metal salts in acid gas scrubbing. The primary sterically hindered aminoacid is selected from...
4892718 Decontamination of gases by scrubbing  
COS, CS2, mercaptan, SH2, SOX and/or NOX are removed from a host gas by scrubbing using a solution of a salt of Scandium, Yttrium, an element of the Lanthanide or Actinium groups or blends thereof...
4891195 Synergistic effect of oil-soluble surfactants and dibasic carboxylic acids on SO2 removal enhancement in flue gas desulfurization process  
A method of improving the SO2 scrubbing efficiency of flue gas desulfurization scrubbers which comprises treating the scrubbers during the scrubbing operations with a dibasic carboxylic acid and...
4758416 Removal of H2 S from gas streams  
A process for the removal of H2 S from sour gaseous streams is disclosed in which the sour gaseous stream is contacted with a solution containing solubilized iron chelates of nitrilotriacetic...
4741888 H2 S removal from gas streams  
A process for the removal of H2 S from sour gaseous streams is disclosed in which the sour gaseous stream is contacted with a solution containing solubilized iron chelates of a specified organic...
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...
4670238 Recycled sorbent flue gas desulfurization  
An improved process for reducing the sulfur content of a flue gas derived from combination of a sulfur-containing fuel by inserting a dry sulfur sorbent material into the flue gas, then...
4659553 Process for removal of undesirable gaseous components from hot flue gases  
The invention refers to a process for the removal of undesirable gaseous components from hot flue gases incurred in the combustion of carbonaceous fuels. The flue gas is passed through...
4578257 Process for removing sulfur dioxide from off-gas  
Disclosed is an improvement in a process for desulfurization of off-gas, which process comprises contacting an off-gas which contains sulfur dioxide with an absorbing solution containing at least...
4559212 Process for purifying gases containing sulphur dioxide  
Process for removal of sulphur dioxide from exhaust gases by absorption in an aqueous solution containing ions of adipic acid, and stripping of sulphur dioxide with steam. Solid adipic acid is...
4554140 Off-gas desulfurization process  
In the conversion of sulfur dioxide in an off-gas to gypsum for removal by oxidizing with an oxygen-containing gas while neutralizing with limestone an absorbed solution formed by contacting an...
4533532 Carboxylic acid activated dry calcium absorbent method for removing sulfur dioxide from a flue gas  
An absorbent for the dry removal of sulfur dioxide and other noxious and toxic components from a combustion flue gas which consists essentially of at least one finely divided alkaline-earth...
4387037 Removal of sulfur from waste gas streams  
Preferential sulfur dioxide absorption solvents may be buffered with suitable agents, such as alkanolaminium carboxylates, to substantially retard or eliminate the tendency of such solvents to...
RE31236 Method of removing sulfur dioxide from combustion exhaust gas  
A method of removing sulfur dioxide from combustion exhaust gas containing sulfur dioxide by contacting the exhaust gas with an aqueous solution containing at least one organic acid salt expressed...
4348289 Water treatment method to remove dissolved oxygen therefrom  
This specification discloses a method of treating water which contains oxygen dissolved therein to scavenge the oxygen therefrom and reduce the corrosiveness of the water. A sulfur-containing fuel...
4337231 Removal of sulfur dioxide from exhaust gas  
A method of removing sulfur dioxide from an exhaust gas with use of an absorbent containing a salt of an organic acid within a scrubber provided with perforated plates, characterized in that the...
4330478 Method of oxidizing a polyvalent metal  
Process of carrying out oxidation-reduction reactions such as oxidation of hydrogen sulfide to sulfur, in which a polyvalent metal chelate with a certain class of polycarboxylic acid is employed,...
4310691 Method for selectively recovering sodium citrate from an aqueous solution  
A process for recovering sodium citrate from a solution utilized in an absorption/stripping process for SO2 recovery, which involves cooling a portion of the stripping solution to precipitate...
4277451 Wet process for the desulfurization of exhaust gas  
A wet process for the desulfurization of exhaust gas comprising the following operation steps so as to eliminate and recover sulfur dioxide from exhaust gas containing it: (A) a step of absorbing...
4222993 Removal of noxious contaminants from gas  
Gas contaminated with at least one noxious component, such as SO2, HF or NOx, is scrubbed with a clear, calcium-containing, initially-basic washing liquid which also comprises the anion of a...
4203954 Process for desulfurization of exhaust gases recovering gypsum as _by-product  
This invention relates to a process for desulfurization of exhaust gases wherein the sulfur oxides are efficiently removed in the stabilized form from exhaust gases containing said sulfur oxides...
4140751 Process for pressure stripping of sulfur dioxide from buffered solutions  
A process for steam stripping sulfur dioxide from a buffered aqueous solution in which it is absorbed in a flue gas desulfurization process is carried out at pressure greater than atmospheric. The...
4136152 Method for treating aqueous mediums  
A method is disclosed for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions comprising adding in combination to the aqueous medium an effective...
4133650 Removing sulfur dioxide from exhaust air  
Advantageously the absorption solution is glutaric acid buffered to a pH of about 3.5 to 6.5, the concentration of the glutaric acid is from about 40% up to 90% of the saturation concentration,...
4091074 Method for regenerating iron-EDTA solutions used for scrubbing plug gases  
A method for purifying industrial exhaust gases containing nitrogen oxides and sulfur oxides, by treating the gases with a circulating absorbing solution containing Fe-EDTA complex salt and...
4087372 An absorbing solution for the removal of nitrogen oxide form a gas containing same  
Oxides of nitrogen can be removed efficiently from a gas containing such oxides of nitrogen by bringing said gas into contact with an aqueous solution containing an organic acid alkali salt and a...
3987149 Method for removing sulfur dioxide from exhaust gas  
A sulfur dioxide-containing exhaust gas is scrubbed by contact with an aqueous solution containing an alkali salt of an organic acid to dissolve sulfur dioxide in the aqueous solution in the form...
3937795 Desulfurizing process for hydrogen sulfide-containing gases  
A process is disclosed for the desulfurization of gases containing hydrogen sulfide, as well as their decyanization and removal of sulfurous acid when the gases contain hydrogen cyanide or...
3907972 Absorbing SO2 with polyacrylic acid solution  
In the recovery of sulfur dioxide (SO2) from an SO2 -containing gas by contacting said gas with an aqueous absorbing solution, thereafter treating said solution to remove the SO2 therefrom at...
3890431 SO2 removal from gases  
A process for recovering SO2 is disclosed. It involves reacting SO2 or a system containing SO2 with carboxymethoxy-succinic acid or a water soluble salt thereof to form an aqueous solution complex...
3888969 Antioxidant for the aqueous solutions of sulfite and/or bisulfite of sodium or potassium and process for preventing the oxidation of said aqueous solution  
An antioxidant for the aqueous solution of sulfite and/or bisulfite of sodium or potassium which comprises at least one compound selected from the group consisting of 1. substituted phenols...
3873674 Conversion of sulfur dioxide to sulfur trioxide by peroxytitanium complexes  
A supported peroxytitanium complex as an oxidizing agent in the form of a fixed bed is employed to convert sulfur dioxide containing gaseous streams, such as stack gases, to sulfur trioxide which...
3867509 PROCESS FOR THE PURIFICATION OF SULFUR AND NITROGEN CONTAINING WASTE WATER AND WASTE GAS  
Sulfur and nitrogen containing waste waters and waste gases are purified by treating with alkali or alkaline earth chlorites in acidic medium at a p H up to 6.
3757488 GAS REMOVAL METHOD AND COMPOSITION  
A selective method of removing sulfur dioxide from flue gases or the like containing both sulfur dioxide and hydrogen sulfide without removing the hydrogen sulfide by bubbling the flue gas through...
3632306 REMOVAL OF SULFUR DIOXIDE FROM WASTE GASES  
Waste gases containing sulfur dioxide, which may also contain sulfur trioxide, are scrubbed with an aqueous slurry containing solid reactant particles of an oxide or carbonate of calcium,...
3690818 CYCLIC PROCESS FOR REMOVAL OF SO2 FROM FLUE GAS  

Matches 1 - 50 out of 54 1 2 >