Process and apparatus for the purification of fumes and gases an

Details Process and apparatus for the purification of fumes and gases an Process and apparatus for the purification of fumes and gases an

1976-10-21

1978-07-11

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423522, C01B 1700, C01B 1772

Patent

active

041002598

ABSTRACT:
A process for purifying combustion gases by removing the sulfur dioxide which they contain and for producing sulfuric acid, consisting in rinsing said gases by means of an aqueous solution capable of oxidizing said sulfur dioxide, said rinsing operation being effected in the presence of oxygen, characterized in that said aqueous rinsing solution comprises at least one element capable of combining with said sulfur dioxide to form within the aqueous solution and in the presence of sulfuric acid a sulfur type intermediate coordination complex capable of cooperating with oxygen and said element to produce at least one oxidizing compound (product) capable of oxidizing said sulfur dioxide at a rapid rate.

REFERENCES:
patent: 2021936 (1935-11-01), Johnstone
patent: 2113198 (1938-04-01), Monhebel
patent: 2342704 (1944-02-01), Striplin, Jr.
patent: 3226192 (1965-12-01), Atsukawa
patent: 3318662 (1967-05-01), Pauling
patent: 3710548 (1973-01-01), Coughlin
patent: 3752884 (1973-08-01), Sasse
patent: 3836630 (1974-09-01), Noguchi
patent: 3947560 (1976-03-01), Nambu et al.
Tarbutton et al., Recovery of Sulfur Dioxide from Flue Gases, I&EC vol. 49, pp. 392-395, Mar. 1957.
Copson et al., Recovery of Sulfur Dioxide as Dilute Sulfuric Acid, I&EC vol. 25, #8, Aug. 1933, pp. 909-916.

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