Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1987-04-27
1989-06-06
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
204 59R, C01B 1700
Patent
active
048369926
ABSTRACT:
A process for desulfurizing waste gas is described, wherein an SO.sub.2 containing waste gas is absorbed in an aqueous solution and the resultant solution containing sulfite is treated electrolytically which is much less expensive than the prior art methods, is simpler to implement and avoids the danger of producing explosive gases which is possible in prior art methods based on anodic O.sub.2 formation and cathodic H.sub.2 formation. In this process, electrochemical oxidation of SO.sub.3.sup.2- ions into SO.sub.4.sup.2- ions occurs at the anode as well as a simultaneous formation of H.sup.+ ions, thereby producing H.sub.2 SO.sub.4, while avoiding the production of oxygen. Apparatus suitable for carrying out this process is also described.
REFERENCES:
patent: 3475122 (1969-10-01), McRae et al.
patent: 3524801 (1970-08-01), Parsi
patent: 4082835 (1978-04-01), Chlanda et al.
patent: 4629545 (1986-02-01), Mani et al.
Holzaepfel Guenter
Mueller Peter
Rickert Hans
Heller Gregory A.
Vereinigte Elektrizitatswerke Westfalen AG
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