Process for the removal of SO.sub.2 from gas streams

Details Process for the removal of SO.sub.2 from gas streams Process for the removal of SO.sub.2 from gas streams

1982-10-27

1984-05-22

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423574R, 423574L, 55 73, C01B 1700, B01D 1900

Patent

active

044501455

ABSTRACT:
The removal of SO.sub.2 from two or more gas streams of differing SO.sub.2 content is accomplished by feeding each of the streams to an absorbent so that the more dilute SO.sub.2 -containing stream or streams is supplied to the absorbent upstream from the point at which the more concentrated stream or streams is supplied. By supplying the gas streams to the absorbent flow in ascending order of SO.sub.2 concentration, the amount of SO.sub.2 absorbed by the absorbent flow is increased.

REFERENCES:
patent: 2563437 (1951-08-01), Townsend et al.
patent: 3047364 (1962-07-01), Vian-Ortuno
patent: 3911093 (1975-10-01), Sherif et al.
patent: 3969492 (1976-07-01), Witte et al.
patent: 4123507 (1978-10-01), Haas
Chang et al., "SO.sub.2 Absorption Into Aqueous Solutions", AIChE Journal, vol. 27, No. 2, pp. 292-298, Mar. 1981.
Pfeiffer, Sulfur Removal and Recovery From Industrial Process, Amer. Chemical Society, pp. 194-195, 1975.

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