Process for removing nitrogen oxides and sulfur oxides from gase

Details Process for removing nitrogen oxides and sulfur oxides from gase Process for removing nitrogen oxides and sulfur oxides from gase

1993-05-10

1994-11-22

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232421, 42324301, 42324307, C01B 1748, C01B 2120

Patent

active

053667107

ABSTRACT:
A process for removing NO.sub.x and/or SO.sub.x from a gaseous stream by oxidation with a fine flocculent acidic catalyst slurry which is regenerable during the process, in particular by pH adjustment in the absence of added heat. The catalyst slurry comprises MnO.sub.2, Mn.sub.2 O.sub.3, and Mn.sub.3 O.sub.4 having pH in the range from about 0.5 to about 6.5 and is prepared by aerating a divalent manganous salt in an aqueous solution having a pH in the range from about 8.0 to about 13.5.

REFERENCES:
patent: 4100259 (1978-07-01), Salaun et al.
patent: 4113840 (1978-09-01), Hanway, Jr. et al.
patent: 4164545 (1979-08-01), Scott
patent: 4925569 (1990-05-01), Chou et al.
patent: 4943422 (1990-07-01), Ledon et al.
"Handbook of Chemistry and Physics" (43rd edition) edited by Hodgman et al. Apr. 1962, Chemical Rubber Publishing Company) Cleveland, Ohio; pp. 604-605.

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