Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1974-10-22
1976-08-10
Vertiz, Oscar R.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
423356, 423155, 423539, C01B 1700
Patent
active
039742571
ABSTRACT:
A SO.sub.2 containing gas, for example a stack gas, is purified according to a multi-step process, which comprises washing said gas with an aqueous ammonia solution, treating the resulting solution with hydrochloric acid, whereby SO.sub.2 and an aqueous ammonium chloride solution are obtained and separated. The ammonium chloride solution is then reacted with magnesium oxide to recovery ammonia and the resulting magnesium chloride is cracked to produce hydrochloric acid and magnesium oxide, the ammonia, hydrochloric acid and magnesium oxide being recycled to the process.
REFERENCES:
patent: 3226192 (1965-12-01), Atsukawa et al.
patent: 3579296 (1971-05-01), Cann
patent: 3792153 (1974-02-01), Lynn et al.
Deschamps Andre
Dezael Claude
Gruhier Henri
Heller Gregory A.
Institut Francais du Petrole, des Carburants et Lubrifiants et
Vertiz Oscar R.
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