DI Ethanol Amine

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DI Ethanol Amine
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DI Ethanol Amine

SKU: RXSOL-19-1119-210
DEA - DI ETHANOL AMINE is most commonly used as a surfactant, corrosion inhibitor and to remove hydrogen sulfide and carbon dioxide.
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Technical Specifications

PRODUCT NAME    :  DI ETHANOL AMINE
CAS number     : 111-42-2
UN number    : 2735
Formula    : (HOCH2CH2)2NH
Odour   : AMMONIA LIKE
Solubility in water   : COMPLETE
Density   : 1.09     at 20   oC
Boiling point    : 269 oC
Melting point    : 28 oC
Viscosity  :  
Flashpoint      : 152 oC
Explosive limits    : 0.1 mbar at 20 oC
Vapour pressure   : 0.1 mbar at 20 oC
Skin absorption/irritation       : YES
TLV       Country  NL            Year  1995      : 3 ppm              15        mg/m3
Pollution category    1994       : D

Application & Dosage

DEA - DI ETHANOL AMINE is most commonly used as a surfactant in cleaning industries and as a corrosion inhibitor in oil field industries. DI ETHANOL AMINE chemically reacts and remove hydrogen sulfide and carbon dioxide from natural gas due this property DEA used in oil refineries as a deodourizer to remove hydrogen sulfide from sour gas.

Diethanolamine is a white, crystalline (sand-like) solid or a colorless to yellow, syrupy liquid with a mild Ammonia-like odor. It is used in specialty textiles, weed killers, detergents, shampoos, paints and metal-working fluids.

Related Information

If RXH is not acid enough to release a proton at alkaline pH, as it is the case with amines, then the reaction has to be carried out in two steps. During the first step the first EO mole is added at acid pH, so that the amine is transformed in ammonium. The reaction produce the mono-, di- and tri-ethanol amines. 

Proton release from ammonium NH4+ → NH3 + H+ (here RX- is NH3) Then, the three condensation reactions: 

 

NH3 + EO → NH2CH2CH2OH (mono-ethanol amine MEA) 
NH2CH2CH2OH + EO → NH(CH2CH2OH)2 (di-ethanol amine DEA) 
NH-(CH2CH2OH)2 + EO → N(CH2CH2OH)3 (tri-ethanol amine TEA) 

With an alkyl amine, first the alkyl ammoniumion is formed and it is deprotonated: 

RNH3+ → RNH2 + H+ (here RX- is RNH2)
RNH2 + EO → RNH-CH2CH2OH (mono-ethanol alkyl amine) 
RNH-CH2CH2OH + EO → RN(CH2CH2OH)2 (di-ethanol alkyl amine) 

Once the ethanol amine is attained, the EO polycondensation is carried out at alkaline pH as previously. In many instance the first ethoxylation is stopped when the monoethanol alkyl amine is formed in order to avoid the polycondensation in more than one chain.