Process of producing sulfuric acid

Details Process of producing sulfuric acid Process of producing sulfuric acid

1980-02-07

1982-06-08

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423533, 422161, 203 12, C01B 1774, C01B 1798, C01B 1748, B01D 300

Patent

active

043339174

ABSTRACT:
A process for the production of sulfuric acid from wet sulfur dioxide containing gases is disclosed. The sulfur dioxide containing gas is initially purified and cooled, then predried with dilute sulfuric acid, finally dried with concentrated sulfuric acid, converted to sulfur trioxide catalytically and, the sulfur trioxide is absorbed in sulfuric acid. Preliminary drying removes more water than needed to maintain the water balance in the following process steps. A portion of the dilute acid from the preliminary drying is concentrated prior to recycle to the preliminary drying step and another portion of the acid from the preliminary dryer is added to the sulfur trioxide absorber to adjust the water balance in the acid circulating between the final dryer and the sulfur trioxide absorber.

REFERENCES:
patent: 2357195 (1944-08-01), Herrmann
patent: 2415142 (1947-02-01), McHaffie et al.
patent: 3853502 (1974-12-01), Dorr et al.
patent: 4177248 (1979-12-01), Richard
patent: 4212855 (1980-07-01), Kerner et al.

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