Process of selectively desulfurizing gases

Details Process of selectively desulfurizing gases Process of selectively desulfurizing gases

1980-03-27

1981-10-27

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423233, B01D 5334

Patent

active

042973309

ABSTRACT:
In a process of selectively desulfurizing gases which contain hydrogen sulfide and carbon dioxide comprising scrubbing the gases with an aqueous potassium carbonate solution under superatmospheric pressure and at temperatures of about 100.degree. C., regenerating the laden scrubbing solution and recycling the regenerated scrubbing solution, the improvement wherein the gases to be purified are scrubbed with an aqueous potassium carbonate solution so as to maintain a mass ratio of 1.0 to 3.0 vals (gram equivalents) of alkali in the solution per mole of CO.sub.2 and H.sub.2 S in the gases to be purified, the laden scrubbing liquor is subsequently regenerated by being stripped with a gas in which a CO.sub.2 partial pressure above 0.2 bar is maintained, and the so regenerated scrubbing solution is recycled.

REFERENCES:
patent: 1440977 (1923-01-01), Espenhan
patent: 1598985 (1926-09-01), Petit
patent: 1918153 (1933-07-01), Wagner
patent: 2094070 (1937-09-01), Huttman et al.

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