Claus residual gas cleanup using tetraethylene glycol...

Details Claus residual gas cleanup using tetraethylene glycol... Claus residual gas cleanup using tetraethylene glycol...

C - Chemistry, Metallurgy

01

B

23/332

C01B 17/04 (2006.01) B01D 53/14 (2006.01) B01D 53/50 (2006.01) B01D 53/86 (2006.01)

Patent

CA 1257074

23 Abstract A process is disclosed for the purification of a gaseous stream contaminated at least with CO2 and H2S. The gaseous stream is preheated and subjected, in the presence of recycled SO2, to a catalytic conversion of H2S into elemental sulfur. The thus-obtained sulfur is separated, and the residual gas, which contains at least H2S, SO2, CO2, and water, is freed absorptively from SO2 after oxidative conversion of H2S to SO2. It is proposed that the residual gas, after oxidative conversion of H2S to SO2, is cooled in heat exchangers, preferably regenerators, and is subsequently scrubbed with a solvent consisting predominantly of tetraethylene glycol dimethyl ether.

463707

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