Process for removal of sour gases by scrubbing

Details Process for removal of sour gases by scrubbing Process for removal of sour gases by scrubbing

1982-04-14

1983-08-16

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423223, 423228, 423232, 423245, 423246, 423421, 423437, B01D 5334

Patent

active

043991114

ABSTRACT:
In the removal of sour gases by scrubbing with an aqueous alkali metal salt solution, e.g. a solution of K.sub.2 CO.sub.3, the circulating scrubbing liquid is gradually contaminated with organic acids, especially formic acid, which in turn ties up K.sup.+ as the formate which is ineffective for scrubbing purposes. To remove the organic acids, at least a partial stream of the circulating scrubbing liquid is subjected to an oxidation step under conditions leading to the oxidation of the salts of the organic acids, thereby liberating the bound alkali metal ions. If the scrubbing liquid contains an oxidizable activator, the latter can be extracted prior to oxidation of the scrubbing liquid and added back subsequent to the oxidation.

REFERENCES:
patent: 3054653 (1962-09-01), Barton et al.
patent: 3086838 (1963-04-01), Giammarco
patent: 3907969 (1975-09-01), Field

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