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  1. B200 工学部/工学研究科
  2. B200b 紀要
  3. Memoirs of the School of Engineering, Nagoya University
  4. 48(2)

Acid catalysis of heteropoly compounds for industrial organic reactions

https://doi.org/10.18999/memsenu.48.2.194
https://doi.org/10.18999/memsenu.48.2.194
a9ec6cb0-91ac-47b1-b780-5d5feee548f2
名前 / ファイル ライセンス アクション
48-2-03.pdf 48-2-03.pdf (3.9 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2020-10-23
タイトル
タイトル Acid catalysis of heteropoly compounds for industrial organic reactions
言語 en
著者 Izumi, Yusuke

× Izumi, Yusuke

WEKO 101801

en Izumi, Yusuke

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
キーワード
主題Scheme Other
主題 catalysis
キーワード
主題Scheme Other
主題 heteropolyacid
キーワード
主題Scheme Other
主題 solid acids
キーワード
主題Scheme Other
主題 silica inclusion
キーワード
主題Scheme Other
主題 industrial organic reactions
抄録
内容記述 The acid catalysis of heteropolyacid and its acidic salts for various types of industrial organic reactions has been studied in the reaction systems of homogeneous liquid phase and heterogeneous liquid and vapor phases. Heteropolyacid was a very effective Br[ö]nsted acid catalyst for the reactions involving carbenium cations, oxonium ions, and oxocarbocations: alkene hydration, ether cleavage reactions including ring opening reactions of epoxide, esterification, transesterification, and Friedel-Crafts alkylation and acylation reactions. At the same proton concentrations and the same ionic strengths, the catalytic activity of heteropolyacid was 3 to 100 times higher than those of the ordinary protonic acids such as sulfuric, nitric, perchloric, and phosphoric acids. The high catalytic activity of heteropolyacid was elucidated by a unique property of heteropoly anion to be able to stabilize the cationic intermediates. Heteropolyacid was effectively be applied as a protonic acid catalyst to several industrially important organic reactions in the forms of a homogeneous solution catalyst and a heterogeneous supported catalyst. Acidic alkali metal salts of heteropolyacid could effectively be applied as insoluble and readily separable solid acid catalysts to the Friedel-Crafts reactions in highly polar organic solvents. Tungstophosphoric acid, as well as its acidic cesium salt, was immobilized in the silica matrix by means of sol-gel technique. Silica-included heteropoly compounds efficiently worked for the hydrolysis of esters as water-insoluble solid acid catalysts.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 School of Engineering, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/memsenu.48.2.194
ID登録タイプ JaLC
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0919-0805
書誌情報 en : Memoirs of the School of Engineering, Nagoya University

巻 48, 号 2, p. 194-234, 発行日 1997-03-31
著者版フラグ
値 publisher
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