Removal of co.sub.2 and/or h.sub.2s from gases

Details Removal of co.sub.2 and/or h.sub.2s from gases Removal of co.sub.2 and/or h.sub.2s from gases

B - Operations, Transporting

01

D

23/346, 23/356

B01D 53/14 (2006.01) C07C 7/11 (2006.01) C10K 1/14 (2006.01)

Patent

CA 1212820

- 10 - Abstract of the Disclosure: CO2 and/or H2S are removed from gases which contain CO2 and/or H2S by a process in which the said gas is treated, in an absorption stage at from 40 to 100°C, with an aqueous absorption liquid con- taining from 20 to 70% by weighty of methyldiethanolamine, the treated gas is taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO2 and/or H2S is taken off at the bottom of the absorption stage and then regenerated by being let down in one or more flash stages, the flash gases being taken off at the top of the flash stage or flash stages, the losses of water as a result of water present in the gas streams taken off at the top of the absorption stage and of the flash stage or flash stages are compensated by feeding in, at the bottom of the last flash stage or, where only one flash stage is used, at the bottom of this, and amount of steam corresponding to the water loss, and the regenerated absorption liquid is recycled to the absorption stage.

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