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Treatment of sulfur oxides with aqueous glyoxylic acid solutions

Patent ·
OSTI ID:6780208
;

Sulfuric acid or absorbed sulfur trioxide in aqueous glyoxylic acid solutions may be removed by contacting the aqueous glyoxylic acid solutions with a barium compund such as barium hydroxide which is substantially inert to the glyoxylic acid but which precipitates barium sulfate from the aqueous glyoxylic acid solution. In a preferred embodiment, aqueous glyoxylic acid solution is used to absorb sulfur dioxide and sulfur trioxide from industrial flue gases and the absorbed sulfur dioxide being removed from the aqueous glyoxylic acid solution by stripping and the absorbed sulfur trioxide being removed from the stripped glyoxylic acid solution by precipitation as barium sulfate.

Assignee:
Spring Chemicals Ltd.
Patent Number(s):
US 4115517
OSTI ID:
6780208
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
ALDEHYDES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
DESIGN
DESULFURIZATION
EQUIPMENT
FLUE GAS
GASEOUS WASTES
GLYOXYLIC ACID
INDUSTRIAL PLANTS
LIQUID WASTES
MANAGEMENT
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PROCESSING
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES