Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1995-08-11
1997-04-08
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423549, 423555, 42324311, 23304, C01C 124, C01F 1146
Patent
active
056185111
ABSTRACT:
A flue-gas scrubbing-liquor regeneration process that is based on contacting N-S compounds contained in a flue-gas scrubbing liquor with a lime/limestone solution in a double draw-off crystallizer under suitable pH conditions for precipitating calcium salts of N-S compounds. The precipitated crop is filtered and then hydrolyzed in a sulfuric acid environment to produce gypsum and ammonium sulfate in solution. The hydrolyzed slurry is filtered and the filtrate is neutralized with lime to liberate ammonia gas that is then sparged through a sulfuric acid solution to cause the precipitation of commercial-grade ammonium sulfate.
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Chang, S.G., in "Technical Analyses of a Wet Process for Flue Gas Simultaus Desulfurization and Denitrification," in Fossil Fuels Utilization: Environmental Concerns, Markuszwesk, R., Blaustem, B.D., Eds., ACS Symposium Series, No. 319, 159-175, 1986 (No Month).
Kwon Taeg M.
Mukhopadhyay Sudarsan
Randolph Alan D.
Durando Antonio R.
Straub Gary P.
The Arizona Board of Regents on behalf of the University of Ariz
Vanoy Timothy G.
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