High Quality Monoethanolamine with CAS number 141 - 43 - 5 is a colorless, viscous, and hygroscopic liquid. It has a mild ammonia - like odor. This product is also known as 2 - Aminoethanol or Monoetanolamina. Its molecular formula is C₂H₇NO, and the molecular weight is 61.08 g/mol.
The product usually has a purity of over 99%, which ensures its high - quality performance in various applications. It is miscible with water, ethanol, and many other polar solvents. The boiling point of monoethanolamine is approximately 170.9 °C, and the melting point is 10.5 °C. It has a density of about 1.018 g/cm³ at 20 °C.
1. **Surfactant and Detergent Industry**: Monoethanolamine is used as an intermediate in the production of surfactants. It can react with fatty acids to form alkanolamides, which are widely used in detergents, shampoos, and other cleaning products. These alkanolamides can reduce the surface tension of water, improve the wetting ability, and enhance the foaming and cleaning performance of the products.
2. **Gas Treatment**: It is an effective absorbent for acidic gases such as carbon dioxide (CO₂) and hydrogen sulfide (H₂S). In natural gas processing and flue - gas treatment, monoethanolamine can react with these acidic gases to form stable compounds, thus removing them from the gas stream and purifying the gas.
3. **Textile Industry**: In the textile industry, monoethanolamine is used as a dye - leveling agent and a pH regulator. It can help the dye to be evenly distributed on the fabric, improving the color fastness and the quality of the dyed products.
4. **Personal Care Products**: Due to its mildness and ability to adjust pH, it is used in personal care products such as lotions, creams, and hair conditioners. It can maintain the stability of the product system and provide a comfortable using experience.
1. **Storage**: Store the product in a cool, dry, and well - ventilated place. Keep it away from heat sources, open flames, and oxidizing agents. The storage container should be tightly sealed to prevent moisture absorption and contamination.
2. **Handling**: When handling monoethanolamine, wear appropriate personal protective equipment, including gloves, goggles, and protective clothing. Avoid direct contact with skin, eyes, and mucous membranes. In case of contact, immediately rinse with plenty of water and seek medical attention if necessary.
3. **Dosing**: The dosage of monoethanolamine depends on the specific application. In general, for gas treatment, the concentration of monoethanolamine in the absorption solution is usually in the range of 15% - 30%. For surfactant production, the amount of monoethanolamine used should be determined according to the reaction stoichiometry and the desired product properties.
**Case 1: Gas Treatment in a Natural Gas Plant**
A natural gas plant in the United States was facing the problem of high levels of CO₂ and H₂S in its raw natural gas. The company decided to use high - quality monoethanolamine for gas treatment. They prepared an absorption solution with a monoethanolamine concentration of 20%. The absorption tower was operated at a temperature of 40 °C and a pressure of 5 MPa. After the treatment, the content of CO₂ in the natural gas was reduced from 5% to less than 1%, and the content of H₂S was reduced from 100 ppm to less than 4 ppm. This not only improved the quality of the natural gas but also met the pipeline transportation standards.
**Case 2: Surfactant Production in a Chemical Factory**
A chemical factory in China used monoethanolamine to produce fatty acid alkanolamides for detergent production. They reacted monoethanolamine with lauric acid at a molar ratio of 1:1. The reaction was carried out at a temperature of 150 °C for 3 hours. The resulting alkanolamide had good foaming and emulsifying properties. When added to the detergent formula, it significantly improved the cleaning ability of the detergent, and the product was well - received in the market.
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