Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Halogenous component
Patent
1993-01-27
1995-02-07
Stoll, Robert L.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Halogenous component
423488, 588205, C01B 700
Patent
active
H00014176
ABSTRACT:
A process for removing halogen gases from a gas stream containing carbon dioxide such as flue gas from an industrial waste incinerator burning chlorinated organic wastes, the process includes seven steps. The first step is to flow fresh absorption liquor to a gas-liquid contactor (such as a column packed with pall rings) the fresh absorption liquor containing water, base and thiosulfate (such as sodium carbonate and sodium thiosulfate). The second step is to flow the gas stream to the gas-liquid contactor. The third step is to contact the fresh absorption liquor and the gas stream in the gas-liquid contactor to form a contacted gas stream and a contacted absorption liquor. The fourth step is to flow the contacted gas stream from the gas-liquid contactor to form an exhaust gas stream from the process. The fifth step is to flow the contacted absorption liquor from the gas-liquid contactor to form used absorption liquor. The exhaust gas must have a concentration of halogen gases that is less than half the concentration of halogen gases in the original gas stream and the exhaust gas must have a concentration of carbon dioxide that is more than half the concentration of carbon dioxide in the original gas stream.
REFERENCES:
patent: 5102638 (1992-04-01), Girrbach et al.
patent: 5238665 (1993-08-01), Lerner
Bredeweg Robert A.
Greminger Douglas C.
Yalvac Engin D.
Anthony Joseph D.
Stevens Timothy S.
Stoll Robert L.
The Dow Chemical Company
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