Treatment of sulfur oxides with aqueous glyoxylic acid solutions

Details Treatment of sulfur oxides with aqueous glyoxylic acid solutions Treatment of sulfur oxides with aqueous glyoxylic acid solutions

1976-08-24

1978-09-19

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423166, C01B 1700, C01F 100

Patent

active

041155173

ABSTRACT:
Sulfuric acid or absorbed sulfur trioxide in aqueous glyoxylic acid solutions may be removed by contacting the aqueous glyoxylic acid solutions with a barium compound 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.

REFERENCES:
patent: 3350165 (1967-10-01), Marcheguet et al.

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