Composition for removing sulfur oxides from a gas

Patent · Tue Jan 18 04:00:00 EST 1983

OSTI ID:6242202

Bertolacini, R J; Hirschberg, E H; Modica, F

Sulfur oxides are removed from a gas by an absorbent comprising at least one inorganic oxide selected from the group consisting of the oxides of aluminum, magnesium, zinc, titanium, and calcium in association with at least one free or combined rare earth metal selected from the group consisting of lanthanum, cerium, praseodymium, samarium, and dysprosium, wherein the ratio by weight of inorganic oxide or oxides to rare earth metal or metals is from about 0.1 to about 30,000. Absorbed sulfur oxides are recovered as a sulfur-containing gas comprising hydrogen sulfide by contacting the spent absorbent with a hydrocarbon in the presence of a hydrocarbon cracking catalyst at a temperature from about 375/sup 0/ to about 900/sup 0/C. The absorbent can be circulated through a fluidized catalytic cracking process together with the hydrocarbon cracking catalyst to reduce sulfur oxide emissions from the regeneration zone.

• Assignee: EDB-83-069093
• Patent Number(s): US 4369130
• OSTI ID: 6242202
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ADSORPTION
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DESIGN
DESULFURIZATION
ELEMENTS
EQUIPMENT
GASEOUS WASTES
HYDROCARBONS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PYROLYSIS
RARE EARTHS
RECOVERY
REGENERATION
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES