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|Section2= |Section3= |Section7= |Section8= }} Dimethoxyethane, also known as glyme, monoglyme, dimethyl glycol, ethylene glycol dimethyl ether, dimethyl cellosolve, and DME, is a clear, colorless, aprotic, and liquid ether that is used as a solvent, especially in batteries.〔D. Berndt, D. Spahrbier, "Batteries" in Ullmann’s Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim. 〕 Dimethoxyethane is miscible with water. ==Production== Monoglyme may be manufactured by a number of methods:〔(Dimethoxyethane )〕 * via the Williamson ether synthesis — reacting the sodium salt of 2-methoxyethanol (previously prepared by reaction with sodium) with chloromethane: :2 CH3OCH2CH2OH + 2 Na → 2 CH3OCH2CH2ONa + H2↑ :CH3OCH2CH2ONa + CH3Cl → CH3OCH2CH2OCH3 + NaCl * via the alkylation of 2-methoxyethanol with dimethyl sulfate * by the cleavage of ethylene oxide in presence of dimethyl ether. This reaction is catalyzed by Lewis acids (e.g. boron trifluoride or its complex with dimethyl ether). This route is not particularly selective and produces diglyme, triglyme, tetraglyme, and other glymes as a by-products. The reaction mixture is separated by distillation: ::CH3OCH3 + CH2CH2O → CH3OCH2CH2OCH3 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「Dimethoxyethane」の詳細全文を読む スポンサード リンク
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