Removal of nitrogen oxides from gas
OwnerBernard J. Lernerinventor
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Abstract
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 reacted with an alkaline solution, typically caustic alkali. As a result of these treatments, the nitrogen oxides are converted into neutral salts.
Claims15
The method of removing nitrogen oxide and nitrogen dioxide from a gas comprising reacting the nitrogen oxides with sulfurous acid, and oxygen in a wet scrubbing operation, thereafter reacting the gaseous product of the reaction of the sulfurous acid and oxygen and the nitrogen oxides with an alkaline solution in a wet scrubbing operation to convert the said product into a salt, the reaction of the nitrogen oxides with the sulfurous acid and oxygen converting the nitrogen oxides into a compound which is readily converted into a salt.
The method of removing nitrogen oxide and nitrogen dioxide, from gas comprising reacting the nitrogen oxides in the gas with sulfurous acid and oxygen in a wet scrubbing operation to convert the nitrogen oxides into a nitrogen-oxygen gaseous compound which reacts readily with alkaline solution, then reacting the nitrogen-oxygen compound with an alkaline solution in a wet scrubbing operation to produce a nitrite salt, and then oxidizing the nitrite salt to convert said nitrite salt into a nitrate salt.
The method of removing nitrogen dioxide from gas comprising reacting the nitrogen dioxide in the gas with sulfurous acid in a wet scrubbing operation to convert the nitrogen dioxide into a compound which reacts readily with alkaline solution, then reacting the said compound with an alkaline solution in a wet scrubbing operation to produce a nitrite salt, and then oxidizing the nitrite salt to convert said nitrite salt into a nitrate salt.
Dependencies are inferred from the claim text.