Diethanolamine, often abbreviated as DEA or DEOA, is an organic compound with the formula HN(CH2CH2OH)2. Pure diethanolamine is a white solid at room temperature, but its tendency to absorb water and to supercool mean it is often encountered as a colorless, viscous liquid. Diethanolamine is polyfunctional, being a secondary amine and a diol.
1. DEA is used as a surfactant and a corrosion inhibitor
2. It is used to remove hydrogen sulfide and carbon dioxide from natural gas
3. In oil refineries, a DEA in water solution is commonly used to remove hydrogen sulfide from various process gases
4. It has an advantage over a similar amine ethanolamine in that a higher cocentration may be used for the same corrosion potential. This allows refners to scrub hydrogen sulfide at a lower circulating amine rate with less overall energy usage
5. DEA is a versatile chemical intermediate, principal derivatives include ethyleneimine and ethylenediamine
6. Dehydration of DEA with sulfuric acid gives morpholine