Regeneration of absorbent solutions used for removing gaseous ac

Details Regeneration of absorbent solutions used for removing gaseous ac Regeneration of absorbent solutions used for removing gaseous ac

1975-11-28

1978-02-14

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423223, 423228, 423232, 423236, 423242, 423243, B01D 5334

Patent

active

040738639

ABSTRACT:
Improvements in the elimination and recovery of gaseous acid impurities from a gaseous mixture containing them, by an absorbing step, wherein said gaseous mixture is brought into contact with an alkaline absorbing solution and a regeneration step wherein the exhausted absorbing solution is regenerated by steam stripping, said absorption step comprising a main column and a secondary column, the main column operating at a higher pressure and by means of a supply of outside heat, the secondary column operating at a lower pressure and substantially by means of the steam obtained by expansion of the solution regenerated in the main column. The exhausted solution to be regenerated is conveyed firstly in one of the two regeneration columns wherein it is regenerated in an incomplete way, and subsequently into the other column where its regeneration is completed.

REFERENCES:
patent: 3563695 (1971-02-01), Benson
patent: 3563696 (1971-02-01), Benson
patent: 3714327 (1973-01-01), Giammarco
patent: 3725529 (1973-03-01), Giammarco et al.
patent: 3823222 (1974-07-01), Benson
patent: 3962404 (1976-06-01), Giammarco

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