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|Section2= |Section4= |Section5= |Section8= }} Dimethyl ether (DME), also known as methoxymethane, is the organic compound with the formula CH3OCH3, simplified to C2H6O. The simplest ether, it is a colorless gas that is a useful precursor to other organic compounds and an aerosol propellant and is being studied as a future energy option. It is an isomer of ethanol. ==Production== Approximately 50,000 tons were produced in 1985 in Western Europe by dehydration of methanol:〔Manfred Müller, Ute Hübsch, “Dimethyl Ether” in Ullmann’s Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2005. 〕 :2 CH3OH → (CH3)2O + H2O The required methanol is obtained from synthesis gas (syngas).〔(Dimethyl Ether Technology and Markets 07/08-S3 Report, ChemSystems, December 2008. )〕 In principle, the methanol could be obtained from organic waste or biomass. Other possible improvements call for a dual catalyst system that permits both methanol synthesis and dehydration in the same process unit, with no methanol isolation and purification.〔〔P.S. Sai Prasad et al., Fuel Processing Technology, 2008, 89, 1281.〕 Both the one-step and two-step processes above are commercially available. Currently, there is more widespread application of the two-step process since it is relatively simple and start-up costs are relatively low. It is worth mentioning that there is a developing one-step liquid-phase process.〔〔(Air Products Technology Offerings )〕 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「dimethyl ether」の詳細全文を読む スポンサード リンク
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