Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1977-11-11
1979-02-13
Vertiz, O. R.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
C01B 1700
Patent
active
041395972
ABSTRACT:
A process for the removal and recovery of sulfur oxides from gas streams by contacting the gas stream with an aqueous suspension of melamine whereupon a mixture of solid, hydrated melamine sulfites, hydrated melamine sulfate is formed. The solids are separated from the reaction product and the clarified liquid recycled. The solids are then heated to temperatures up to 200.degree. C. to decompose the hydrated melamine sulfites into free melamine, gaseous water, and sulfur dioxide, and the gaseous water and sulfur dioxide withdrawn as product. The hot solids are cooled and split into two portions. One portion is recycled and the other portion is treated with a base stronger than melamine to decompose the contained melamine sulfate into free melamine and a basic sulfate salt solution. The basic sulfate salt solution is separated from the melamine and withdrawn as product and the melamine is recycled to the process.
REFERENCES:
patent: 1783901 (1930-12-01), Bottoms
patent: 3658462 (1972-04-01), Van Scoy
Mann et al., "Symposium on Flue Gas Desulfurization", p. 719, EPA 600/2-76-1366, 1976.
Gautney Joe
Kim Yong K.
Kohler John J.
McCullough John F.
Heller Gregory A.
Petrusek Robert A.
Tennessee Valley Authority
Vertiz O. R.
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