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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク P-Cresol ： ウィキペディア英語版 P-Cresol |Section2= |Section7= |Section8= }} ''para''-Cresol, also 4-methylphenol, is an organic compound with the formula CH3C6H4(OH). It is a colourless solid that is widely used intermediate in the production of other chemicals. It is a derivative of phenol, an isomer of ''o''-cresol and ''m''-cresol. ==Production== Together with many other compounds, ''p''-cresol is traditionally extracted from coal tar, the volatilized materials obtained in the roasting of coal to produce coke. This residue contains a few percent by weight of phenol and cresols. ''p''-Cresol is currently prepared industrially mainly by a two step route beginning with the sulfonation of toluene: :CH3C6H5 + H2SO4 → CH3C6H4SO3H + H2O Base hydrolysis of the sulfonate salt gives the sodium salt of the cresol: :CH3C6H4SO3Na + 2 NaOH → CH3C6H4OH + Na2SO3 + H2O Other methods for the production of ''p''-cresol include chlorination of toluene followed by hydrolysis. In the cymene-cresol process, phenol is alkylated with propylene to give ''p''-cymene, which can be oxidatively dealkylated.〔 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「P-Cresol」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.