N-methyldiethanolamine (MDEA, also known as methylaminodiethanol, N,N-bis(2-hydroxyethyl)methylamine
N-Methyldiethanolamine
Molecular formula: CH3-N(CH2CH2OH)2 Structural formula:
HO — C H2 — C H2
╲
N — CH3
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HO — CH2 — CH2
Features: Contains two hydroxyl groups and one amino group. The hydroxyl groups reduce the vapor pressure and increase the solubility, which is beneficial to the absorption of acid gas, can increase the concentration, reduce the circulation volume, and reduce energy consumption. The presence of the methyl group in the amino group reduces the alkalinity and activity of the amino group, and reduces the absorption rate of CO2.
The molecular weight is 119.16, the melting point is -21°C, the flash point is 127°C, the freezing point is -21°C, and the refractive index is 1.4678. Viscosity (20℃) 101mPa·s. The latent heat of vaporization is 519.16KJ/Kg. Colorless or slightly yellow viscous liquid, boiling point 247°C, easily soluble in water and alcohol, slightly soluble in ether. Combustible. Non-toxic, LD504780mg/kg. It is a new solvent for selective desulfurization and decarburization with excellent performance. It has the advantages of high selectivity, low solvent consumption, significant energy saving effect, and is not easy to degrade.
