Chemistry of inorganic compounds – Nitrogen or compound thereof – Oxygen containing
Patent
1981-06-30
1983-02-08
Peters, G. O.
Chemistry of inorganic compounds
Nitrogen or compound thereof
Oxygen containing
261114A, 422189, C01B 2140
Patent
active
043729355
ABSTRACT:
Nitric oxide, NO, and nitrogen peroxide, NO.sub.2, are facilely removed from gaseous admixtures comprising the same, together with gaseous oxygen, advantageously in a plate tower for the commercial production of nitric acid, by countercurrently oxidizing/absorbing said gaseous feedstream in aqueous solution, in a gas/liquid phase contactor, and wherein that section of said phase contactor the NO.sub.x content in the gaseous feedstream is less than 6000 vpm, the improvement which comprises that the residence time in said less than 6000 vpm section of said phase contactor, is increased to a value such that the ratio K, of the liquid retention volume in cubic meters in said phase contactor to the rate of flow therein of said gaseous feedstream in Nm.sup.3 /hour, in excess of 5.10.sup.-4 hour.
REFERENCES:
patent: 1840063 (1932-01-01), Taylor
patent: 3137452 (1964-06-01), Lerulle
patent: 3464788 (1969-09-01), LaCroix
Botton Roger
Cosserat Dominique
Peters G. O.
Rhone-Poulenc Industries
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