Recovery of sulfur dioxide from gas mixtures

Details Recovery of sulfur dioxide from gas mixtures Recovery of sulfur dioxide from gas mixtures

1974-02-26

1976-05-25

Vertiz, Oscar R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423243, C01B 1748

Patent

active

039594513

ABSTRACT:
SO.sub.2 is removed from a SO.sub.2 - containing gas mixture utilizing an aromatic amine as absorbent, followed by scrubbing the SO.sub.2 - depleted, aromatic amine - enriched gas with sulfurous acid solution to remove most of the gaseous aromatic amine therefrom and then with dilute sulfuric acid solution to remove substantially all of the small amount of residual gaseous aromatic amine from the gas. The aqueous scrubbing solutions containing aromatic amine sulfite and aromatic amine sulfate from the respective sulfurous acid and sulfuric acid scrubbing zones are combined and ammonia is added thereto, resulting in release of the aromatic amine and in the formation of ammonium sulfate. Aqueous solution containing the ammonium sulfate is introduced into the upper portion of the sulfurous acid scrubbing section.

REFERENCES:
patent: 1972074 (1934-09-01), Boswell
patent: 2047819 (1936-07-01), Boswell et al.
patent: 2128027 (1938-08-01), Clark
patent: 2186453 (1940-01-01), Gleason et al.
patent: 2295587 (1942-09-01), Fleming et al.
patent: 2399013 (1946-04-01), Fleming et al.
patent: 3330621 (1967-07-01), Vian-Ortuno et al.

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