Ethanolamine Solution CAS 141-43-5

2. Refinery gas treatment
In the refining industry, it is used for catalytic cracking unit tail gas treatment, which can effectively remove SO ₂ and NO ₓ. Taking a certain refinery as an example, using ethanolamine sulfolane composite solvent, under the conditions of absorption tower pressure of 1.2 MPa and temperature of 45 ℃, the removal rate of SO ₂ reached 98%, and the conversion rate of NO ₓ exceeded 85%, significantly reducing the pollution of exhaust emissions to the environment.
3. Purification of synthesis gas
In processes such as coal gasification and biomass gasification, trace sulfides (such as COS and CS ₂) can be deeply removed from synthesis gas. Research has shown that under the conditions of ethanolamine concentration of 25%, temperature of 50 ℃, and pressure of 3MPa, the COS removal rate can reach 99.5%, meeting the purity requirements of the feed gas for Fischer Tropsch synthesis (S ≤ 0.1ppm).

2. Alcohol ether sulfate (AES)
Reacts with ethylene oxide (EO) to produce alcohol ethers, which are then sulfated to obtain alcohol ether sulfates. For example, Sodium Lauryl Polyether Sulfate (SLES) is the main surfactant in shampoo and shower gel, usually added in an amount of 10% -15%, which can significantly reduce the surface tension of water and enhance its cleaning ability. Research has shown that the critical micelle concentration (CMC) of SLES is only 0.008mol/L, which is much lower than traditional soap (CMC=0.015mol/L) and has higher cleaning efficiency.
3. Betaine based amphoteric surfactants
Cocoamide propyl betaine (CAB) can be synthesized by reacting with sodium chloroacetate. This substance has both anionic and cationic properties and remains stable over a wide pH range (pH=3-10) with low skin irritation. Adding 1.5% CAB to baby shampoo can achieve a "tear free formula" while providing a soft touch and good conditioning properties.

Antitumor drugs: Ethanolamine reacts with fluorouracil to form fluorouracil ethanolamine salt, which can improve the drug's lipid solubility and enhance its permeability to tumor tissue. Animal experiments have shown that the inhibitory rate of this derivative on mouse liver cancer is 20% higher than that of fluorouracil.
2. Pesticide intermediates
Aminoformate insecticides: Ethanolamine reacts with phosgene to form isocyanates, which then condense with methanol to obtain methyl carbamate. It is a key intermediate in the synthesis of insecticides such as carbapene and furandan. Xiweiyin has a significant insecticidal effect on cotton bollworms with an LC ₅₀ of 0.5mg/L.
Herbicide: Ethanolamine reacts with 2,4-dichlorophenoxyacetic acid (2,4-D) to form 2,4-D ethanolamine salt, which can improve the solubility and stability of herbicides. Field experiments have shown that 2,4-D ethanolamine salt has a 90% control effect on broadleaf weeds and is highly safe for crops.

2. Antistatic agent
Ethanolamine reacts with long-chain fatty acids to form alkyl ethanolamides, such as stearic monoethanolamide (SME), which can reduce the surface resistivity of fabrics and prevent static electricity accumulation. Adding 1% -2% SME in the processing of synthetic fibers such as polyester and nylon can reduce the surface resistance of the fabric from 10 ¹⁴ Ω to 10 ⁸ Ω, effectively eliminating the problem of electrostatic adsorption of dust.
3. Anti moth agent
Ethanolamine reacts with naphthol to form naphthol ethanolamine salt, which can inhibit the growth and development of pests such as moths and bark beetles. In the anti moth finishing of wool fabrics, the use of immersion rolling method to load naphthol ethanolamine salt on the fiber surface can maintain the anti moth effect for more than 1 year without significantly affecting the fabric strength.

2. Paint dispersant
Ethanolamine reacts with polycarboxylate to form polycarboxylate ethanolamine salt, which can reduce the surface tension of pigments in coatings and improve dispersion stability. Adding 0.5% polycarboxylate ethanolamine salt to water-based coatings can reduce the pigment particle size from 10 μ m to 2 μ m, and there is no precipitation after 6 months of storage, significantly extending the shelf life of the coating.
3. Polyurethane catalyst
Ethanolamine solution, as the catalyst of polyurethane foam, can accelerate the reaction between isocyanate and polyol. In the preparation of rigid polyurethane foam, adding 0.1% ethanolamine can shorten the rise time of foam from 60 seconds to 30 seconds, and increase the density uniformity by 15%, meeting the requirements of building thermal insulation materials.

Adding 0.5% cyclohexane ethanolamine salt to the base oil can reduce the corrosion rate of steel sheets from 0.2mg/cm ² · d to 0.01mg/cm ² · d, significantly extending the service life of equipment.

3. Environmental governance
Ethanolamine can be used to treat wastewater containing heavy metal ions such as Pb ² ⁺ and Cd ² ⁺. Research has shown that under pH=5, the complexation constant of ethanolamine with Pb ² ⁺ reaches 10 ⁴, which can reduce the concentration of Pb ² ⁺ in wastewater from 100mg/L to below 0.1mg/L, meeting the discharge standard.