Process for removing sulfur from sulfur-containing gases

Patent · Tue Jun 05 04:00:00 EDT 1990

OSTI ID:6731299

Rochelle, G T; Jozewicz, W

This patent describes a process for reducing the level of sulfur in a sulfur dioxide-containing gas. It comprises: preparing an aqueous slurry comprising a calcium alkali together with a calcium-reactive silica or alumina which are present in amounts sufficient to allow for the formation of a sulfur dioxide-absorbing component which includes a calcium silicate or calcium aluminate; heating the slurry to a temperature between about 40{degrees} and about 200{degrees} C. to facilitate in the formation of the sulfur dioxide-absorbing component; contacting the gas with the slurry in a manner sufficient to allow for the absorption of sulfur dioxide by the absorbing component; and separating the absorbing component in the form of spent solids from the gas.

• Assignee: Board of Regents, Univ. of Texas System, Austin, TX (USA)
• Patent Number(s): US 4931264; A
• Application Number: PPN: US 7-238364A
• OSTI ID: 6731299
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
SILICATES
SILICON COMPOUNDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES