Claus residual gas cleanup using tetraethylene glycol dimethyl e

Details Claus residual gas cleanup using tetraethylene glycol dimethyl e Claus residual gas cleanup using tetraethylene glycol dimethyl e

1987-02-27

1989-01-03

Doll, John

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

55 73, 423574R, 4235731, C01B 1700

Patent

active

047956208

ABSTRACT:
A process is disclosed for the purification of a gaseous stream contaminated at least with CO.sub.2 and H.sub.2 S. The gaseous stream is preheated and subjected, in the presence of recycled SO.sub.2, to a catalytic conversion of H.sub.2 S into elemental sulfur. The thus-obtained sulfur is separated, and the residual gas, which contains at least H.sub.2 S, SO.sub.2, CO.sub.2, and water, is freed absorptively from SO.sub.2 after oxidative conversion of H.sub.2 S to SO.sub.2. It is proposed that the residual gas, after oxidative conversion of H.sub.2 S to SO.sub.2, is cooled in heat exchangers, preferably regenerators, and is subsequently scrubbed with a solvent consisting predominantly of tetraethylene glycol dimethyl ether.

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Goar, B. Gene, "Tail Gas Cleanup Process Technology", Energy Progress (vol. 6, No. 2) Jun. 1986, pp. 84-90.
Sames, John A., "Impact of Claus Plant Operation on Tail Gas Treating", Stretford Conference, Oct., 1987.
Kohl, Arthur L., Gas Purification, Third Edition Gulf Publishing Co., Copyright 1960, 1974, 1979.

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