Process for removing ammonia, hydrogen sulfide and hydrocyanic acid from gases
Method for removing nitrogen oxides from flue gas by absorption
An absorbing solution for the removal of nitrogen oxide form a gas containing same
ApplicationNo. 06/317948 filed on 11/04/1981
US Classes:423/235, Nitrogen or nitrogenous component423/385, Oxygen containing423/395, Nitrate423/396, Ammonium containing423/523, Nitrogenous impurity or utilizing nitrogenous catalyst or reactant436/163INCLUDING TITRATION OR PH DETERMINATION
ExaminersPrimary: Heller, Gregory A.
Attorney, Agent or Firm
International ClassesC01B 21/48 (20060101)
C01B 21/20 (20060101)
C01B 21/00 (20060101)
B01D 53/56 (20060101)
AbstractGas 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.