Chemistry of inorganic compounds – Sulfur or compound thereof
Patent
1996-01-02
2000-07-11
Griffin, Steven P.
Chemistry of inorganic compounds
Sulfur or compound thereof
4235121, 423544, 423554, 423555, 4232421, 42324301, 42324308, 42324401, 42324403, C01B 1700, C01B 1796, C01F 1146
Patent
active
060868422
ABSTRACT:
The present invention is directed towards a system that makes high quality gypsum from a dry flue gas desulfurization process which utilizes a low temperature regeneration of the carbon adsorbent in the flue gas process. The high quality gypsum is easily filterable with large crystal size and has high purity with few contaminants, such as calcium sulfite and heavy metals. This invention is also directed towards a system that regenerates the carbon used in dry flue gas desulfurization at a temperature below 120.degree. C. and the recycling of sodium hydroxide to form a sodium sulfite reducing solution for carbon adsorbent regeneration.
REFERENCES:
patent: 4302221 (1981-11-01), Tanaka
patent: 5599508 (1997-02-01), Martinelli et al.
patent: 5770537 (1998-06-01), El-Shoubary et al.
Kim Bang Mo
Shilling Norman Zethward
Cusick Ernest G.
General Electric Company
Griffin Steven P.
Johnson Noreen C.
Nave Eileen E.
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