Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Patent
1977-09-26
1979-03-13
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
423226, 423235, 423238, 55 68, 55 71, 55 73, B01D 5334
Patent
active
041443144
ABSTRACT:
An improvement in a process for regenerating a water-containing, highly volatile organic solvent which has been used to scrub acid constituents from gases having a low content of water and of volatile compounds of the 8th group of the Periodic System is disclosed. According to the process, solvent which contains absorbed acid constituents is regenerated in a regeneration zone by heating the same to drive off acid constituents and deacidified solvent is recycled in the scrubbing process. According to the invention the solvent is contacted during the regeneration with a complexing agent soluble in the solvent in an amount of 0.005 to 1 gram complexing agent per liter of solvent. A branch stream is removed from the regeneration zone which branch stream contains volatile solvent, water and metal salts dissolved in the water. The branch stream is subjected to distillation to remove overhead the volatile solvent which is returned to the regeneration zone and to leave behind an aqueous solution of the metal salt. A compensating amount of water is added to the solvent cycle.
REFERENCES:
patent: 3137654 (1964-06-01), Johnson et al.
patent: 3972693 (1976-08-01), Wiesner et al.
patent: 4011066 (1977-03-01), Bratzler et al.
Doerges Alexander
Schlauer Johannes
Metallgesellschaft Aktiengesellschaft
Thomas Earl C.
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