Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1985-01-11
1986-07-15
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
208113, C01B 1700
Patent
active
046005676
ABSTRACT:
A process for removing catalyst fines and more than 99% of sulfur oxides in the regenerator effluent gas of a fluid catalytic cracking system, which comprises contacting within a venturi structure a gaseous effluent containing sulfur oxides with a liquid scrubbing mixture; passing the admixture of said gaseous effluent and liquid scrubbing mixture through a constricted passage of the venturi structure to increase the velocity thereof; separating the admixture into a liquid portion and a gas portion; delivering the gas portion of the separation step to a packed tower beneath the packed section thereof; contacting the gas portion with liquid scrubbing mixture in the packed section of the tower to form a gaseous overhead effluent substantially free of sulfur oxides and a bottoms liquid; combining the bottom liquid from the packed section of the tower with the liquid portion from the separating step to form a combined liquid bottoms; adjusting the pH of the combined liquid bottoms with a basic solution to form a liquid scrubbing mixture; and dividing the liquid scrubbing mixture into a tower bottoms products, a first recycle stream providing the liquid scrubbing mixture to the venturi structure, and a second recycle stream providing the liquid scrubbing mixture to the packed tower.
REFERENCES:
patent: 3520649 (1970-07-01), Tomany et al.
patent: 3852408 (1974-12-01), Ewan et al.
patent: 3906078 (1975-09-01), Hausberg et al.
patent: 3970740 (1976-07-01), Reeder et al.
Heller Gregory A.
Koch Refining Company
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