Process for removing acidic compounds from gaseous mixtures usin

Details Process for removing acidic compounds from gaseous mixtures usin Process for removing acidic compounds from gaseous mixtures usin

1979-12-21

1981-02-17

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423232, 423234, B01D 5334

Patent

active

042514940

ABSTRACT:
An improved process for removing carbon dioxide from a gaseous feed including carbon dioxide is described. The carbon dioxide is removed from a gaseous feed by contacting the feed in a contacting zone with a scrubbing solution comprising a sterically hindered amine and an alkali metal salt or alkali metal hydroxide, which at least partially absorbs the carbon dioxide. The scrubbing solution subsequently is desorbed and separated into a two-phase liquid system, an upper phase relatively rich in sterically hindered amine and having a relatively high ratio of alkali bicarbonate to alkali carbonate and a lower liquid phase having a relatively low ratio of alkali bicarbonate to alkali carbonate. The lower liquid phase is returned to the contacting zone at a location above that at which the upper liquid phase is returned to the contacting zone.

REFERENCES:
patent: 2886405 (1959-05-01), Benson et al.
patent: 4094957 (1978-06-01), Sartori et al.
patent: 4112050 (1978-09-01), Sartori et al.
patent: 4112051 (1978-09-01), Sartori et al.
patent: 4112502 (1978-09-01), Sartori et al.

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