Process for obtaining nitric acid of a concentration higher than

Details Process for obtaining nitric acid of a concentration higher than Process for obtaining nitric acid of a concentration higher than

1976-09-07

1977-12-20

Peters, G. O.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423394, C01B 2140

Patent

active

040642216

ABSTRACT:
The present invention relates to a process for obtaining nitric acid of a concentration higher than the azeotropic concentration by means of the absorption of nitrogen oxides in water or diluted nitric acid and the partial pressure of the nitrogen oxides before absorption is raised partly by compression of the gases that contain the nitrous gases and partly by means of a cycle of diluted nitric acid which is decomposed by the action of the NO contained in the gases, enriching them in NO.sub.2 and which subsequently reform by absorption of NO.sub.2 in water when the partial pressure of the nitrogen oxides is low.

REFERENCES:
patent: 2088057 (1937-07-01), Handforth
patent: 2098953 (1937-11-01), Christensen
patent: 2123467 (1938-07-01), Hobler
patent: 3399965 (1968-09-01), Kalous
patent: 3716625 (1973-02-01), Oberste-Berghaus

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