Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1982-01-04
1983-10-11
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423223, 423228, 423229, 423232, B01D 5334
Patent
active
044091915
ABSTRACT:
A process for removing acid gases such as CO.sub.2 and H.sub.2 S from gas streams using a cyclic aqueous alkaline scrubbing solution which is circulated between an absorption and regeneration stage is disclosed. This process is improved by integrating within this cyclic system a process scheme wherein condensed steam having gaseous impurities dissolved therein is recovered from the feed gas and subjected to a pressure below which scrubbing solution regeneration takes place. While maintaining this pressure, the process condensate is heated, boiled and stripped to evolve a vaporous mixture comprising steam and gaseous impurities which are compressed and introduced into the regeneration stage. By this process, useful work is performed by low temperature process streams thereby improving the overall efficiency of the cyclic process.
REFERENCES:
patent: 3787559 (1974-01-01), Rudolph et al.
patent: 3823222 (1974-07-01), Benson
patent: 4160810 (1979-07-01), Benson
patent: 4198378 (1980-04-01), Giammarco et al.
patent: 4308243 (1981-12-01), Castel et al.
Exxon Research & Engineering Co.
Maggio Robert A.
Murray, Jr. Jack B.
Thomas Earl C.
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