B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/346
B01D 53/14 (2006.01)
Patent
CA 1290553
Abstract of the Disclosure: CO2 and/or H2S are removed from gases containing CO2 and/or H2S by means of an aqueous alkanolamine-containing absorption liquid by a process in which the gas containing CO2 and/or H2S is treated in a first absorption stage at from 40 to 100°C with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the gas obtained at the top of the first absorption stage is fed to a second absorption stage in which, in order to remove further CO2 and/or H2S, it is treated at from 30 to 90°C with an aqueous absorption liquid which contains from 20 to 70% by weight of methyldiethanolamine and has a lower content of CO2 and/or H2S than the absorption liquid fed to the first absorption stage, the treated gas is taken off at the top of the second absorption stage, the aqueous absorption liquid laden with CO2 and/or H2S and obtained at the bottom of the second absorption stage is fed to the top of the first absorption stage, the aqueous absorp- tion liquid laden with CO2 and/or H2S and obtained in the lower part of the first absorption stage is regenerated by being let down in two or more flash stages, the final flash stage being operated under reduced pressure which is generated by means of a mechanical vacuum-producing apparatus and a steam-jet ejector, which are connected in series, a stream of absorption liquid obtained at the bottom of the final flash stage is recycled to the first absorption stage, a further stream of absorption liquid obtained at the bottom of the final and/or penultimate flash stage or stages is fed to a stripping zone for further regeneration, and the regenerated absorption liquid obtained at the bottom of the stripping zone is recycled to the second absorption stage.
496618
Hefner Werner
Schubert Franz
Volkamer Klaus
Wagner Eckhart
Wagner Ulrich
Basf Aktiengesellschaft
Robic
LandOfFree
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