Process for removing nitrogen oxides from gaseous mixtures

Details Process for removing nitrogen oxides from gaseous mixtures Process for removing nitrogen oxides from gaseous mixtures

1976-10-12

1978-04-25

Meros, Edward J.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423235, 423551, C01B 2100, C01B 2110

Patent

active

040863271

ABSTRACT:
Gaseous mixtures containing nitrogen oxides are contacted with an aqueous solution containing sodium sulfite, trisodium imidobissulfate and sodium sulfate while adjusting the pH thereof by sodium hydroxide or sodium carbonate, and sulfur dioxide is contacted therewith simultaneously or thereafter to produce therein disodium imidobissulfate and sodium hydrogensulfate, and then sodium hydroxide is added therein to deposit sodium sulfate 10 hydrate firstly and trisodium imidobissulfate 1 hydrate secondly, and thereafter the mother liquor is recycled as the absorption medium for nitrogen oxides.

REFERENCES:
patent: 1010177 (1911-11-01), Raschig
patent: 2772145 (1956-11-01), Joris et al.
patent: 2812238 (1957-11-01), Quinn et al.
patent: 3329478 (1967-07-01), Garlet

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