Sulfur recovery process

Details Sulfur recovery process Sulfur recovery process

1975-10-14

1977-08-09

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

55 73, 423244, B01D 5314

Patent

active

040411311

ABSTRACT:
An improved sulfur recovery process is disclosed. Sulfur oxides are removed from stack gases with an acceptor. Sulfur oxides are recovered from the acceptor in a periodic regeneration step. The sulfur oxides in the regeneration off gas are concentrated by use of an absorber-stripper. The absorber absorbs sulfur oxides with an absorbent, and the stripper liberates concentrated sulfur oxides from the absorbent. Key feature of the process is use of two vessels to contain absorbent. Only when significant amounts of sulfur oxides are being absorbed is absorbent sent to a rich absorbent holding tank. Regenerated absorbent and absorbent from the absorber which does not contain much sulfur oxides are sent to the lean absorbent tank. Main advantage of operating with two tanks is optimum use of the stripper, which is fed with absorbent containing a constant and high concentration of sulfur oxides.

REFERENCES:
patent: 1417066 (1922-05-01), Howard
patent: 3403496 (1968-10-01), Ahlander et al.
patent: 3764665 (1973-10-01), Groenendaal et al.
patent: 3847570 (1974-11-01), Gunther

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