Process for removing nitrogen oxides from waste gas

Details Process for removing nitrogen oxides from waste gas Process for removing nitrogen oxides from waste gas

1975-12-30

1977-06-14

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423351, 423512R, C01B 2100

Patent

active

040297390

ABSTRACT:
Nitrogen oxides can be efficiently removed from waste gas containing the same by oxidizing nitrogen monoxide into nitrogen dioxide, and then by scrubbing said waste gas with an aqueous scrubbing solution containing (a) a sulfur-containing reducing compound of alkali metals or ammonium such as alkali or ammonium sulfites, thiosulfates, sulfides, polysulfides and hydrosulfites and (b) a catalytic compound such as amino compounds, nitro compounds and oxidation or reduction derivatives thereof.

REFERENCES:
patent: 3615199 (1971-10-01), Terrana et al.
patent: 3843771 (1974-10-01), Urban
patent: 3888969 (1975-10-01), Kawamoto et al.
patent: 3904735 (1975-09-01), Atwood et al.
patent: 3932585 (1976-01-01), Moriguchi et al.
patent: 3957949 (1976-05-01), Senjo et al.
patent: 3961018 (1976-06-01), Williamson
Inorganic Chemistry, vol. 1, 1962, pp. 768-770 --Rxns of NO with Misc. Lewis Bases, Longhi et al.
Inorganic Syntheses, 1957, Moeller, pp. 117-122, "N-Nitroso-Hydroxyamine-N-Sulfonates."

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