| 摘要 |
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 DEG 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 CO2 and H2S in the gases to be purified, the laden scrubbing liquor is subsequently regenerated by being stripped with a gas in which a CO2 partial pressure above 0.2 bar is maintained, and the so regenerated scrubbing solution is recycled. |
