Diethanolamine

CAS 111-42-2

A reusable gas-cleaning liquid must capture a molecule and later release it. Diethanolamine helps do this in acid-gas treatment. Its secondary amine can react with carbon dioxide, including through carbamate formation, while its hydroxyl-containing structure supports use in aqueous systems. The loaded liquid is regenerated and returned to the absorber. Reaction rate is only part of the engineering problem: capacity, regeneration energy and solvent durability matter too. Even changing the surrounding solvent can alter the measured chemistry. Diethanolamine also serves as an industrial intermediate, with nitrogen and alcohol groups offering different reaction sites. Exposure control and prevention of unwanted reactions remain necessary. Its value comes from managing chemical behavior across an entire capture-and-release cycle, rather than from a single irreversible binding step.