Process for removing SOx and NOx compounds from gas streams

Patent · Tue Feb 08 04:00:00 EST 1983

OSTI ID:6345565

Hass, R H

A process for removing SOx pollutants from a stack gas by (1) abvsorbing the SOx pollutants into an aqueous absorbent containing a formate compound and (2) regenerating the spent absorbent containing dissolved SOx compounds by contact, in the presence of added formate anion, with a water-insoluble, solid substance containing one or more tertiary amine functional groups. Nitrogen monoxide is removed by providing in the aqueous absorbent an iron(II) chelate, such as a chelate of ferrous ion with ethylenediaminetetraacetic acid. Regeneration of the spent absorbent containing absorbed NO is accomplished under the same conditions as for spent absorbents containing absorbed SOx compounds. SOx and NO pollutants dissolved in the absorbent are, during regeneration, converted to hydrogen sulfide and nitrogen, respectively.

• Assignee: Union Oil Co of California
• Patent Number(s): US 4372932
• OSTI ID: 6345565
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ABSORPTION
CHALCOGENIDES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
DENITRIFICATION
DESULFURIZATION
EQUIPMENT
GASEOUS WASTES
MANAGEMENT
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
REGENERATION
STACK DISPOSAL
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES