Chemistry of inorganic compounds – Nitrogen or compound thereof – Oxygen containing
Patent
1976-03-10
1977-08-30
Thomas, Earl C.
Chemistry of inorganic compounds
Nitrogen or compound thereof
Oxygen containing
C01B 2150
Patent
active
040455408
ABSTRACT:
Ammonium nitrite is commercially produced by contacting a gaseous stream containing nitric oxide, nitrogen dioxide and oxygen with an aqueous solution containing a basically reacting ammonium compound in an absorption system. However, at normal production rates, serious problems have been encountered because of the emission of unreacted nitric oxide which causes pollution of the atmosphere. It has now been found that by adding controlled supplemental quantities of nitrogen dioxide to the absorption system, nitrogen oxide emission is substantially reduced.
REFERENCES:
patent: 1061630 (1913-05-01), Pauling
patent: 1070070 (1913-08-01), Rothe
patent: 2797144 (1957-06-01), Joris
patent: 2805123 (1957-09-01), Bostian
Allied Chemical Corporation
Kelly Fred L.
Thomas Earl C.
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