Chemical

Products

Diethanolamine

Cas Number

111-42-2

Other Names

Bis(hydroxyethyl)amine

N,N-Bis(2-hydroxyethyl)amine

2,2'-Dihydroxydiethylamine

β,β'-Dihydroxydiethylamine

Diolamine

2-[(2-Hydroxyethyl)amino]ethanol

2,2'-Iminobisethanol

Iminodiethanol

Di(2-hydroxyethyl)amine

bis(2-Hydroxyethyl)amine

2,2'-Iminodiethanol

The formula

HN(CH2CH2OH)2

Introduction

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.

Physical and Chemical Properties
Physical state and appearance Solid
Molecular Weight 105.14 g/mole
Boiling Point 268°C (514.4°F)
Flash point 168.9°C (336°F)
Melting Point 28°C (82.4°F)
Specific Gravity 1.1 (Water = 1)
Vapor Density 3.6 (Air = 1)
Dispersion Properties See solubility in water
Solubility Easily soluble in cold water, hot water
Diethanolamine Purity 99.00 %
Monoethanolamine 0.1 %
Triethanolamine 0.17 %
Water 0.03 %
Applications

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