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Process for purge stream treatment in removal of sulfur dioxide

Patent ·
OSTI ID:5370873
;

A process for treating the purge stream from an aqueous sodium sulfite/sodium bisulfite solution used in the removal (recovery) of sulfur dioxide from gas is provided wherein the purge stream is mixed with sodium hydroxide or sodium carbonate, the mix is cooled and sodium sulfite hydrate is crystallized and recycled for recovery of sulfur dioxide, and the residual mother liquor containing impurities is discarded.

Assignee:
TIC; EDB-80-067464
Patent Number(s):
US 4177244
OSTI ID:
5370873
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION ABATEMENT
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
DESIGN
DESULFURIZATION
EQUIPMENT
FLUE GAS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
INDUSTRIAL PLANTS
MANAGEMENT
MATERIALS RECOVERY
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
PROCESSING
RECOVERY
SODIUM CARBONATES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES