翻訳と辞書 Words near each other ・ 2,5-Furandicarboxylic acid ・ 2,5-Xylidine ・ 2,500 year celebration of the Persian Empire ・ 2,6-beta-fructan 6-levanbiohydrolase ・ 2,6-Di-tert-butylphenol ・ 2,6-Di-tert-butylpyridine ・ 2,6-Diacetylpyridine ・ 2,6-Diaminopurine ・ 2,6-Dichlorobenzonitrile ・ 2,6-Dichlorophenol ・ 2,6-Dihydroxybenzoic acid ・ 2,6-dihydroxypseudooxynicotine hydrolase ・ 2,6-Dihydroxypyridine ・ 2,6-dihydroxypyridine 3-monooxygenase ・ 2,6-Dimethoxybenzoquinone ・ 2,6-Dimethylnaphthalene ・ 2,6-Dimethylpiperidine ・ 2,6-dioxo-6-phenylhexa-3-enoate hydrolase ・ 2,6-Lutidine ・ 2,6-Naphthalenedicarboxylic acid ・ 2,6-Pyridinedicarbothioic acid ・ 2,6-Xylenol ・ 2,6-Xylidine ・ 2,7,4'-Trihydroxyisoflavanone 4'-O-methyltransferase ・ 2,7-Dihydrothiepine ・ 2,8-Dihydroxyadenine ・ 2,alpha-DMT ・ 2,N,N-TMT ・ 2- and 4-Quinolones ・ 2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA isomerase Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 2,6-Dimethylnaphthalene ： ウィキペディア英語版 2,6-Dimethylnaphthalene 2,6-Dimethylnaphthalene (2,6-DMN) is a polycyclic aromatic hydrocarbon. It is one of the many possible dimethylnaphthalene isomers which are derived from naphthalene by the addition of two methyl groups. 2,6-DMN is of commercial importance as a starting material for high-performance polyester fibers and films. Polyethylene naphthalate (PEN) is made using the oxidation product of 2,6- DMN. ==Synthesis== Alkylated naphthalenes (methyl-, dimethyl-, and poly-methyl naphthalenes, thus including 2,6-DMN) are found in low concentrations in crude oil and coal tar. Separation is difficult, expensive, and requires a number of operations such as selective crystallization and adsorption, in addition to any isomerization reactions. There has been a search for suitable synthetic routes to 2,6-DMN. In the "alkenylation process" butadiene (1) and ''o''-xylene (2) are used, which react to form 5-(orthotolyl)pent-2-ene (OTP, 3). OTP is subsequently cyclized to 1,5-dimethyltetraline (4). Dehydrogenation then provides 1,5-dimethylnaphthalene (1,5-DMN, 5). Finally, 1,5-DMN is isomerized to 2,6-DMN (6). In the final step, other mono-, di-, and tri-ethylnaphthalenes are formed. More work is therefore required in separation of the mixture, which is done by selective crystallization. : 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「2,6-Dimethylnaphthalene」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.