Selective removal of sulfur compounds from acid gas mixtures con

Details Selective removal of sulfur compounds from acid gas mixtures con Selective removal of sulfur compounds from acid gas mixtures con

1974-11-27

1976-06-22

Carter, Herbert J.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423226, 423243, B01D 5334

Patent

active

039652440

ABSTRACT:
Acidic gases containing H.sub.2 S, CO.sub.2 and substantial concentratiOns of COS are reduced in sulfur content by contacting said gases in a first stage at elevated temperatures with an aqueous polyalkanolamine solution containing at least 20% by weight of a tetramethylene sulfone wherein a substantial portion of the COS present is hydrolyzed to H.sub.2 S and CO.sub.2, after which the hydrolyzed acid gases consisting substantially of H.sub.2 S and CO.sub.2 are contacted in a second stage with an alkanolamine absorbent for H.sub.2 S under conditions where H.sub.2 S is selectively removed to low levels.

REFERENCES:
patent: 2083213 (1937-06-01), Baehr
patent: 3098705 (1963-07-01), Bally
patent: 3266866 (1966-08-01), Bally et al.
patent: 3347621 (1967-10-01), Papadopoulos et al.

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