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US 4,363,791 AGranted
Alkanolaminium carboxylate solvents for selective SO.sub.2 absorption
AssigneeTrentham Corporation
InventorsH. Lee Trentham, John H. Crow, Farwell C. Boston
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Abstract
Aqueous solutions comprising from about 35 to about 85% by weight of an alkanolaminium carboxylate have proven to be highly efficient absorption solvents for sulfur dioxide. Such solvents preferentially absorb sulfur dioxide from the gas streams containing large quantities of carbon dioxide. The rate at which dissolved sulfur dioxide oxidizes to non-regenerable sulfate salts is significantly reduced by such solvents.
Claims8
A method for preferentially absorbing sulfur dioxide from a gaseous mixture which comprises
- contacting said gaseous mixture with an aqueous solution containing from about 3% to about 85% by weight of an alkanolaminium carboxylate.
Dependencies are inferred from the claim text.