Absorption of SO.sub.2 from a dilute gas and desorbing it at hig

Details Absorption of SO.sub.2 from a dilute gas and desorbing it at hig Absorption of SO.sub.2 from a dilute gas and desorbing it at hig

1973-04-27

1976-05-04

Hart, Charles N.

Gas separation

Means within gas stream for conducting concentrate to collector

55 47, 55 48, 55 55, 55 56, 55 73, B01D 1900, B01D 5314

Patent

active

039544257

ABSTRACT:
Relatively dilute SO.sub.2 containing gases, such as tail gases from sulfuric acid plants, combustion gases from high sulfur fuels, and the like, are treated with a solvent, such as water, at approximately atmospheric pressures to dissolve the SO.sub.2, and the solution is then stripped at subatmospheric pressure with a gas, such as air, or a reducing gas if the SO.sub.2 is to be finally recovered as sulfur. The sub-atmospheric pressure may be attained by expansion of the stripping gas in a suitable gas expansion machine, and the stripped gas is then recompressed to a pressure, such as substantially atmospheric, at which final utilization of the stripped SO.sub.2 takes place.

REFERENCES:
patent: 1398791 (1921-11-01), Pascal
patent: 1751103 (1924-10-01), Schroeder
patent: 1901416 (1933-03-01), Schroeder
patent: 2047819 (1936-07-01), Boswell et al.
patent: 3511027 (1970-05-01), Roberts et al.

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