Process for the removal of H.sub.2 S and CO.sub.2 from gaseous s

Details Process for the removal of H.sub.2 S and CO.sub.2 from gaseous s Process for the removal of H.sub.2 S and CO.sub.2 from gaseous s

1981-05-26

1983-01-11

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423224, 423573G, B01D 5334, C01B 1704

Patent

active

043681786

ABSTRACT:
A cyclic process for the simultaneous removal of hydrogen sulfide and carbon dioxide from a variety of gas streams is disclosed. The gas stream containing the sour gases is contacted with a solution of the Fe(III) chelate of nitrilotriacetic acid in an absorbent comprising diethylene glycol monoethyl ether. The hydrogen sulfide is converted to sulfur, the CO.sub.2 is absorbed to produce a purified gas stream, and the Fe(III) chelate is converted to the Fe(II) chelate. The process includes sulfur removal and regeneration of the absorbent and the Fe(III) chelate.

REFERENCES:
patent: 2881047 (1959-04-01), Townsend
patent: 3068065 (1962-12-01), Hartley et al.
patent: 3266320 (1965-12-01), Meuly et al.
patent: 3516793 (1970-06-01), Renault
patent: 3622273 (1971-11-01), Roberts et al.
patent: 3933993 (1976-01-01), Salemme
patent: 4009251 (1977-02-01), Meuly
patent: 4091073 (1978-05-01), Winkler

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