Absorption system

Details Absorption system Absorption system

1974-09-09

1976-11-09

Vertiz, Oscar R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423512A, C01B 1700

Patent

active

039911624

ABSTRACT:
The use of a 1-35%, by weight, aqueous solution of a composition of sodium pyrosulfite and sodium sulfite at a pressure of approximately one atmosphere and a temperature of 75.degree.-155.degree. F. to remove substantially all sulfur dioxide from gas streams containing the same. The sulfur dioxide-containing gas stream is placed in intimate contact with a plurality of progressively decreasing concentrations of said aqueous solution. Additionally, as the relative strength of successive aqueous solutions is decreased, the relative concentration of sodium pyrosulfite to sodium sulfite within each aqueous solution is inverted. That is, the first, or strongest, aqueous solution includes the largest ratio of sodium pyrosulfite to sodium sulfite, and the last, or weakest, aqueous solution includes the smallest ratio of sodium pyrosulfite to sodium sulfite.

REFERENCES:
patent: 3653812 (1972-04-01), Schneider et al.
patent: 3687624 (1972-08-01), Terrana et al.
patent: 3687625 (1972-08-01), Terrana et al.

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