Co.sub.2 addition to suppress h.sub.2s evolution in...

Details Co.sub.2 addition to suppress h.sub.2s evolution in... Co.sub.2 addition to suppress h.sub.2s evolution in...

F - Mech Eng,Light,Heat,Weapons

25

J

162/106

F25J 3/02 (2006.01)

Patent

CA 1271124

"CO2 ADDITION TO SUPPRESS H2S EVOLUTION IN ABSORPTION-DESORPTION PROCESS" Abstract of the Disclosure In the methanol scrubbing of sour gases, especially CO2 and H2S, from gaseous mixtures wherein the methanol contains alkaline-reacting compounds to counteract corro- sion and is regenerated for reuse by expansion, stripping and/or thermal regeneration, CO2 is introduced into the methanol circuit at a location where the latter is usually free of CO2, e.g., at the bottom of a thermal regeneration column, in order to suppress the formation of sulfide com- pounds, e.g., NH4HS, capable of decomposing into H2S upon contact with CO2 at the top of the scrubbing column.

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