翻訳と辞書 Words near each other ・ Hydrogen vehicle ・ Hydrogen-cooled turbo generator ・ Hydrogen-like atom ・ Hydrogen-moderated self-regulating nuclear power module ・ Hydrogen-powered aircraft ・ Hydrogen-sulfide S-acetyltransferase ・ Hydrogen-terminated silicon surface ・ Hydrogenacetylenedicarboxylate ・ Hydrogenase ・ Hydrogenase (acceptor) ・ Hydrogenase (NAD+, ferredoxin) ・ Hydrogenase maturation protease family ・ Hydrogenase mimic ・ Hydrogenated jojoba oil ・ Hydrogenated starch hydrolysates ・ Hydrogenation ・ Hydrogenation of carbon–nitrogen double bonds ・ Hydrogenics ・ Hydrogenobacter thermophilus ・ Hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolysing) ・ Hydrogenography ・ Hydrogenolysis ・ Hydrogenophaga ・ Hydrogenophaga atypica ・ Hydrogenophaga bisanensis ・ Hydrogenophaga caeni ・ Hydrogenophaga defluvii ・ Hydrogenophaga flava ・ Hydrogenophaga intermedia ・ Hydrogenophaga palleronii 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 Hydrogenation ： ウィキペディア英語版 Hydrogenation Hydrogenation – to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds. Hydrogenation typically constitutes the addition of pairs of hydrogen atoms to a molecule, generally an alkene. Catalysts are required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures. Hydrogenation reduces double and triple bonds in hydrocarbons. Because of the importance of hydrogen, many related reactions have been developed for its use. Most hydrogenations use gaseous hydrogen (H2), but some involve the alternative sources of hydrogen, not H2: these processes are called transfer hydrogenations. The reverse reaction, removal of hydrogen from a molecule, is called dehydrogenation. A reaction where bonds are broken while hydrogen is added is called hydrogenolysis, a reaction that may occur to carbon-carbon and carbon-heteroatom (oxygen, nitrogen or halogen) bonds. Hydrogenation differs from protonation or hydride addition: in hydrogenation, the products have the same charge as the reactants. Hydrogenation of unsaturated fats produces saturated fats. In the case of partial hydrogenation, trans fats may be generated as well. ==Process== Hydrogenation has three components, the unsaturated substrate, the hydrogen (or hydrogen source) and, invariably, a catalyst. The reduction reaction is carried out at different temperatures and pressures depending upon the substrate and the activity of the catalyst. 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「Hydrogenation」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.