Removal of CO.sub.2 and/or H.sub.2 S from gases

Details Removal of CO.sub.2 and/or H.sub.2 S from gases Removal of CO.sub.2 and/or H.sub.2 S from gases

1984-02-29

1985-11-05

Hart, Charles

Gas separation

Means within gas stream for conducting concentrate to collector

55 55, 55 68, 55 73, 423228, B01D 4700

Patent

active

045511586

ABSTRACT:
CO.sub.2 and/or H.sub.2 S are removed from gases which contain CO.sub.2 and/or H.sub.2 S by means of an aqueous absorption liquid containing an alkanolamine, by a process wherein the said gas is treated, in an absorption stage, at from 40.degree. to 100.degree. C., with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the treated gas is taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO.sub.2 and/or H.sub.2 S is taken off at the bottom of this stage and is regenerated by being let down in two or more flash stages, and the final flash stage is operated under reduced pressure and the regenerated absorption liquid is recycled to the absorption stage.

REFERENCES:
patent: 4035166 (1977-07-01), van Hecke
patent: 4080424 (1978-03-01), Miller et al.
patent: 4100257 (1978-07-01), Sartori et al.
patent: 4330305 (1982-05-01), Kuessner et al.
patent: 4452763 (1984-06-01), Van de Kraats et al.
A. L. Kohl-F. C. Riesenfeld, Gas Purification, 3rd Edition, 1979.

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