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|Section2= |Section3= |Section4= |Section5= }} Diethanolamine, often abbreviated as DEA or DEOA, is an organic compound with the formula HN(CH2CH2OH)2. Pure diethanolamine is a white solid at room temperature, but its tendency to absorb water and to supercool〔(【引用サイトリンク】url=http://www.alliancechemicals.com/wp-content/uploads/2011/09/DEAspecification.pdf )〕 mean it is often encountered as a colorless, viscous liquid. Diethanolamine is polyfunctional, being a secondary amine and a diol. Like other organic amines, diethanolamine acts as a weak base. Reflecting the hydrophilic character of the alcohol groups, DEA is soluble in water. Amides prepared from DEA are often also hydrophilic. ==Production== The reaction of ethylene oxide with aqueous ammonia first produces ethanolamine: :C2H4O + NH3 → H2NCH2CH2OH which reacts with a second and third equivalent of ethylene oxide to give DEA and triethanolamine: :C2H4O + H2NCH2CH2OH → HN(CH2CH2OH)2 :C2H4O + HN(CH2CH2OH)2 → N(CH2CH2OH)3 About 300M kg are produced annually in this way.〔Matthias Frauenkron, Johann-Peter M elder, Günther Ruider, Roland Rossbacher, Hartmut Höke “Ethanolamines and Propanolamines” in Ullmann's Encyclopedia of Industrial Chemistry 2002 by Wiley-VCH, Weinheim 〕 The ratio of the products can be controlled by changing the stoichiometry of the reactants. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「diethanolamine」の詳細全文を読む スポンサード リンク
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