Triethanolamine TEA
Triethanolamine is a colorless to pale yellow, hygroscopic viscous liquid with slight ammoniacal odor. We are supplier and exporter of TEA.
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.
PRODUCT NAME :TRI ETHANOL AMINE
CAS number :102-71-6
UN number :
Formula :(HOC2H4)3N
Odour :SLIGHTLY AMMONIACAL
Solubility in water :COMPLETE
Density:1.13 at 20 oC
Boiling point :360 oC
Melting point :21 oC
Viscosity :
Flashpoint :190 oC
Explosive limits :1.2 - ? Vol%
Vapour pressure :.03 mbar at 20 oC
Skin absorption/irritation :YES
TLV Country NL Year 1995 :
Pollution category 1994 :D
MOLECULAR formula : N(CH2CH3)3
ANTI-LIVERING AGENT(An anti-livering agent is a coating additive used to prevent the increased consistency of a precipitate from forming on a metal surface due to polymerization or other chemical reactions) FOR UREA & MELAMINE BASED ENAMELS; RECOVERY OF GELLED PAINT VEHICLES; CATALYST FOR POLYURETHANE FOAMS; FLUX FOR COPPER SOLDERING.
