Abatement of NO.sub.x from hydroxylamine disulfonate process

Details Abatement of NO.sub.x from hydroxylamine disulfonate process Abatement of NO.sub.x from hydroxylamine disulfonate process

1988-12-28

1991-02-26

Heller, Gregory A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423235, C01B 21093, C01B 2120, C01B 2100

Patent

active

049960369

ABSTRACT:
In the production of hydroxylamine disulfonate diammonium salt (DS) comprising reacting ammonium nitrite with ammonium bisulfite and sulfur dioxide in an absorption reactor whereby emission gases comprising NO.sub.x, particularly NO, are released as a result of side reactions, the method of treating said emission gases to reduce the concentration of NO comprises adding NO.sub.2 to the emission gases and contacting the mixture of NO.sub.2 and emission gases with an aqueous alkali solution sufficiently to form nitrite and nitrate ions in said alkali solution.

REFERENCES:
patent: 4045540 (1977-08-01), Hertzog
patent: 4233279 (1980-11-01), Balint et al.
patent: 4839148 (1989-06-01), Ritter et al.
patent: 4847054 (1989-07-01), Weisweiler
patent: 4851201 (1989-07-01), Heap et al.
patent: 4853193 (1989-08-01), Cahn et al.
European Search Report EP 89 11 9 610, Apr. 9, 1990 for corresponding international PCT application.

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