Method and apparatus for making sulphuric acid

Details Method and apparatus for making sulphuric acid Method and apparatus for making sulphuric acid

1985-04-23

1986-05-27

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423533, 422161, C01B 1798, C01B 1774, C01B 1748

Patent

active

045914940

ABSTRACT:
In a system using the double absorption process for sulphuric acid manufacture, a single acid circulation system and a single cooler are employed. Acid from the exit of the air drying tower is circulated to and flows through the final absorber where it absorbs the inlet SO.sub.3 gas before joining with the acid from the intermediate absorber. The mixed stream is then cooled and split between the drying tower and the intermediate absorber. The circulation arrangement reduces the cooling to one relatively high temperature location, eliminates the transfer of SO.sub.2 to the effluent gas from acid in the normal single system, and simplifies acid strength and level control.

REFERENCES:
patent: 3432264 (1969-03-01), Bostwick et al.
patent: 3536446 (1970-10-01), Maurer
patent: 3752884 (1973-08-01), Sasse
patent: 3818088 (1974-06-01), Sasse

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