Sodium-limestone double alkali flue gas desulfurization method

Patent · Tue Oct 18 00:00:00 EDT 1983

OSTI ID:5271185

Wang, K H; Biolchini, R J; Legatski, L K

A flue gas desulfurization method is disclosed for efficiently removing sulfur oxides from a gas stream with an aqueous sodium sulfite- and sodium bisulfite-containing absorption solution, in which absorber effluent solution at a pH of 5.8 to 6.6 and having an active sodium concentration of from 0.5 M to 0.9 M is regenerated with sufficient ground limestone to yield a treated solution with a higher pH of from 6.3 to 7.0 and whose bisulfite concentration is reduced by from 35 to 70%

• Assignee: FMC Corp.
• Patent Number(s): US 4410500
• OSTI ID: 5271185
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ABSORPTION
ALKALI METAL COMPOUNDS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
LIMESTONE
OXIDES
OXYGEN COMPOUNDS
REGENERATION
ROCKS
SEDIMENTARY ROCKS
SODIUM COMPOUNDS
SULFITES
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES