Process for scrubbing of NO and/or SO.sub.2 from gas mixtures

Details Process for scrubbing of NO and/or SO.sub.2 from gas mixtures Process for scrubbing of NO and/or SO.sub.2 from gas mixtures

1988-03-28

1989-12-05

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423243, C01B 2100, C01B 1700

Patent

active

048851469

ABSTRACT:
A process is described for scrubbing of NO.sub.x and/or SO.sub.2 from waste gases as, e.g., flue gases, which employs a scrubbing agent comprising Fe(II) ions in nonaqueous solvents. The scrubbing agent can be regenerated after its loading simply by heating and/or reduction of pressure, after which the scrubbing agent can be reused. A slight reduction of the Fe(II) ion concentration occurring by oxidation can be balanced by simple means. The process makes it possible to scrub out NO or NO.sub.x alone or together with SO.sub.2. If SO.sub.2 alone is to be scrubbed out of a gas mixture, addition of Fe(II) salt can be eliminated.

REFERENCES:
patent: 3538631 (1970-11-01), Cantrell et al.
patent: 3681015 (1972-08-01), Gelbein et al.
patent: 3767777 (1973-10-01), Frye et al.
patent: 4418044 (1983-11-01), Kulik

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