Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1997-05-20
1999-04-20
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423228, 423229, 423243, 42324308, 423555, B01D 5350, B01D 5362
Patent
active
058956344
ABSTRACT:
This invention provides a process for effecting desulfurization and decarbonation in two stages. A gas containing sulfur oxides and carbon dioxide is first treated in a desulfurization step so as to cause sulfur oxides to be absorbed in the form of calcium-sulfur oxide compounds; the gas is then treated in a decarbonation step so as to cause carbon dioxide and any sulfur oxides escaping from the desulfurization step to be absorbed in the form of amine salts; the absorbing solution containing the amine salts is regenerated by liberating carbon dioxide therefrom; a part of the regenerated absorbing solution is recycled to the decarbonation step while the remainder of the absorbing solution is fed to a secondary regeneration step where it is treated with a basic calcium substance to regenerate basic amine compound for recycle and to form a solid containing calcium-sulfur oxide compounds and calcium carbonate.
REFERENCES:
English Abstract for Accession No. 93-049205 "Treat Combust Exhaust Gas Wet Desulphurise Remove Carbon Di Oxide Remove Poision Matter", corresponding to JP 05000231 A published on Jan. 1993.
Iijima Masaki
Mitsuoka Shigeaki
Tanaka Hiroshi
Mitsubishi Heavy Industries Ltd.
Straub Gary P.
Vanoy Timothy C.
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