(redirected from Monoethanolamine)
Also found in: Dictionary, Medical, Acronyms.


(organic chemistry)
NH2(CH2)2OH A colorless liquid, miscible in water; used in scrubbing hydrogen sulfide (H2S) and carbon dioxide (CO2) from petroleum gas streams, for dry cleaning, in paints, and in pharmaceuticals.



any of three amino alcohols with the general formula RR′NCH2CH2OH—namely, monoethanolamine (also known as colamine; R = R′ = H), diethanolamine (R = H, R′ = CH2CH2OH), and triethanolamine (R = R′ = CH2CH2OH). These three alcohols have boiling points of 171°, 271°, and 360°C and densities (at 20°C) of 1.0179, 1.0919, and 1.1258 g/cm3, respectively.

Ethanolamines are usually produced by reacting concentrated ammonia with ethylene oxide and fractionating the mixture to separate the three types of ethanolamines. All three are viscous, hygroscopic liquids that readily dissolve in water, ethanol, and chloroform. They are weak bases. Monoethanolamine and diethanolamine are used as easily regenerated absorbing agents for acidic gases, such as carbon dioxide, sulfur dioxide, and hydrogen sulfide. Triethanolamine is used as an inhibitor of corrosion and an antifreeze additive. Upon reaction with aliphatic carboxylic acids, ethanolamines yield surfactants (emulsifiers and detergents). Ethanolamines are also used for softening and finishing leather, and they serve as intermediates in the synthesis of drugs, insecticides, and preservatives. Certain derivatives of ethanolamines are common in nature; choline is one example.

References in periodicals archive ?
Effects of inhaled monoethanolamine on bronchoconstriction.
Shen, "Calculation of Equilibrium Solubility of Carbon Dioxide in Aqueous Mixtures of Monoethanolamine with Methyldiethanolamine," Fluid Phase Equilib.
The first commercial copper preservatives were based on copper solubilized as an aqueous monoethanolamine or ammoniacal complex.
Examples of workable solvents include amyl propionate, butyl butyrate, alkyl lactates, ethyl hexyl acetate, dibasic esters, methyl and ethyl soyate, cyclohexanone, methyl ethyl ketone, dipropylene glycol, dipropylene glycol methyl ether, trichloroethylene, xylene, ethanol, tetrahydrofurfuryl alcohol, hexane, mineral spirits, monoethanolamine, d-limonene, dimethyl formamide, n-methyl pyrrolidone, and propylene carbonate.
Monoethanolamine and Its Salts: European Union Market Outlook 2010 and Forecast till 2015
By rapidly detecting low levels of monoethanolamine in crude units on site, Baker Hughes can rapidly provide critical data about its presence and concentration shortening analysis time from a day to one hour.
Nylon 6 and 6,6 Inorganic sail Aqueous solutions 127 solutions of zinc chloride and lithium halides Polycarbonate Windshield Surfactant, 128 wiper fluids monoethanolamine Polycarbonate Butter and Triglycerides 129 related found to be more chemicals aggressive than butter Polycarbonate Sunscreen Potential problem 130 (oils) in automotive applications Polycarbonate Silicone oil ESC observed with 131 silicone oil of [Less Than Sign]410 g/mol molecular weight SAN copolymers Freon vapor Critical stress 132 for craze initiation increased 4-fold for AN increase from 0 lo 33 wt% PVC Benzene Significant 133 enriched decrease in natural gas crazing stress with [Greater Than Sign] 25,00 ppm benzene Polysulfone Boiler Encountered in 134 additives steam (e.
which meets the AWPA P5 07 specifications (#21) for CuN-W, meaning it contained monoethanolamine as the cosolvent (AWPA 2007).
Dow Chemical expects its specialty alkanolamines business to experience demand growth with the advent of two alternative wood preservation technologies that use monoethanolamine (MEA).