Your Professional Ethanolamine Supplier
Since its establishment in 2010, Sinolook has been deeply involved in the energy and chemical sectors and has become one of the leading base oil and petrochemical traders in China and Asia. In the niche field of fine chemicals, we have a deep understanding of the characteristics and application scenarios of each type of product.
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![Diethanolamine]()
DiethanolamineDiethanolamine (DEA, CAS 111-42-2) is a secondary amine with formula (HOCH₂CH₂)₂NH — two hydroxyethyl groups on one nitrogen, combining amine and diol functionality. A viscous solid near room -
![Triethanolamine]()
TriethanolamineTriethanolamine (TEA, CAS 102-71-6) is a tertiary amine with formula N(CH₂CH₂OH)₃ — three hydroxyethyl groups on one nitrogen, making it the mildest ethanolamine (pKa 7.76, flash point 179 °C). A -
![Monoethanolamine]()
MonoethanolamineMonoethanolamine (MEA), CAS 141-43-5, is a bifunctional amino alcohol (C₂H₇NO) combining a primary amine (–NH₂) and a hydroxyl (–OH) group in one molecule. This dual reactivity makes MEA
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What is Ethanolamine
Ethanolamine (2-aminoethanol or MEA) is a naturally occurring organic chemical compound that functions as both a primary amine and a primary alcohol. This bifunctional nature makes it a highly versatile chemical, best known for its use as a surfactant, an acidic gas scrubber, and a pH regulator in various consumer and industrial products.
Specification
|
Parameter |
MEA 99%+ (High Purity) |
MEA 70% Solution |
|
Assay (MEA content) |
≥ 99.5% Industrial |
69.0 – 71.0% |
|
Water content |
≤ 0.1% |
29.0 – 31.0% (deionized) |
|
Density (20 °C) |
1.017 g/cm³ |
0.985 – 0.995 g/cm³ |
|
Boiling Point |
170.5 °C |
165 – 170 °C |
|
Melting Point |
−10.5 °C |
−8 to −3 °C (freezing pt) |
|
Flash Point (cc) |
93 °C |
≥ 75 °C (typical: 78 °C) |
|
Viscosity |
24.1 mPa·s at 20 °C |
18 – 22 mPa·s at 25 °C |
|
PH |
12.1 (0.1 mol/L aq.) |
10.8 – 11.8 (1% aq.) |
|
Color (APHA) |
≤ 10 |
≤ 20 |
|
DEA impurity |
≤ 0.1% |
≤ 0.25% |
|
Ammonia |
≤ 0.05% |
≤ 0.20% |
|
Refractive Index (20 °C) |
~1.4541 |
1.4480 – 1.4510 |
|
Inhalation risk |
Higher – ventilation required |
Lower (water reduces volatility) |
|
Relative cost |
Higher |
~20–30% lower |
|
Applicable Standards |
GB/T 4649-2018 · USP · FCC VI |
ASTM D4569 · ASTM D4052 |
|
Packaging |
200 L drum · 1000 L IBC · ISO Tank |
|
|
Best for |
Gas sweetening · CO₂ capture · Pharma · Surfactant synthesis |
Detergents · Metalworking · Textiles · Construction · CO₂ pilot |
Monoethanolamine (MEA)
MEA is a colorless liquid formed by reacting ammonia with ethylene oxide. It serves primarily in chemical processing and as a surfactant.
Diethanolamine (DEA)
DEA results from reacting ammonia with propylene oxide. It functions as a corrosion inhibitor and is used in pharmaceuticals.
Triethanolamine (TEA)
TEA forms when ammonia reacts with butylene oxide. It finds widespread use in cosmetics and personal care products for its foaming properties.
Isopropanolamines
Derived from isopropanol, isopropanolamines are used in similar applications as ethanolamines, such as in surfactants and personal care products.
Conventional Production Methods
The main industrial methods for ethanolamine production involve the reaction of ethylene oxide (EO) with ammonia:
Liquid ammonia method: EO reacts with liquid ammonia in the presence of a catalyst to produce a mixture of MEA, DEA, and TEA.
Ammonium hydroxide method: EO reacts with ammonium hydroxide, with water acting as a catalyst.
Catalysts and Reaction Conditions
Catalysts: Amination catalysts containing active metals (e.g., Sn, Ni, Co, Cu) and support materials (e.g., ZSM-5 zeolite, hydrotalcite) are commonly used.
Reaction conditions: Typical conditions include temperatures of 323-343 K, pressures of 3-5 MPa, and NH3/EO molar ratios of 10:1.
Product Separation and Purification
The reaction mixture undergoes deamination, dehydration, and distillation to separate MEA, DEA, and TEA products. Excess ammonia is recovered and recycled. Advanced processes like reactive distillation can improve selectivity and energy efficiency.
Applications of Ethanolamine
Gas Treatment
It is widely used for the removal and recovery of acid gases (e.g., carbon dioxide, hydrogen sulfide) from natural gas, fuel gas, and process gas streams. It acts as an effective acid gas absorption solvent in gas-sweetening processes.
Surfactants and Detergents
It is a key raw material for the production of monoalkanolamides, which are nonionic surfactants used in detergents, emulsifiers, and soaps. It is also used in the formulation of specialty cleaners and scouring agents.
Textile and Leather Auxiliaries
Ethanolamine finds applications in the manufacture of inks, paper, glues, textiles, and polishes. It is used as a dye intermediate for acetate rayon dyes and dyestuffs.
Rubber and Plastics
It is employed as a rubber accelerator, specifically for the synthesis of 2-mercaptothiazole used in rubber vulcanization. It is also utilized as an emulsifier and ink additive in the plastics industry.
FAQ
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