Process for removal of sour gases by scrubbing
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.
- Assignee:
- Linde Aktiengesellschaft (Germany, Federal Republic Of)
- Patent Number(s):
- US 4399111
- OSTI ID:
- 5654791
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
FORMIC ACID
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
REMOVAL
SCRUBBING
SULFIDES
SULFUR COMPOUNDS
WASTES