Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1978-06-05
1980-07-15
Vertiz, O. R.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423540, 423542, C01B 1772, C01B 1750
Patent
active
042128552
ABSTRACT:
An improved process for the production of concentrated sulfuric acid from H.sub.2 O- and SO.sub.2 -containing gases by the oxidation of the SO.sub.2 thereof in a plurality of contact stages while lowering the temperature of the gases, thereby condensing the sulfuric acid therefrom, comprises cooling a portion of the sulfur dioxide-containing gases exiting from a combustion or cracking furnace by contacting them with cooling water, the water vapor contained in the gases thereby being partially condensed-out or separated-off. The resulting cooled gases with reduced steam content are recycled into the furnace and, by the selection of the cooling temperature of the recycled gas, the H.sub.2 O/SO.sub.2 mol ratio in the combustion or cracking gases is adjusted within the range of from 1.0 to 1.25, and the remaining portion of the sulfur dioxide-containing gases, i.e., those which are not recycled, is fed to contact oxidation stages.
REFERENCES:
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patent: 2091943 (1937-08-01), Gilchrist et al.
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patent: 3907979 (1975-09-01), Jenniges
Kerner Walter
Schmitz Paul
Davy Powergas GmbH
Straub Gary P.
Vertiz O. R.
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