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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Education > Bulletin > Science bulletin of the Faculty of Education, Nagasaki University > No. 25 >


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Title: 還元銀セライトによるベンジルアルコールの脱水素反応
Other Titles: The Dehydrogenation of Benzyl Alcohol with Reduced Silver Carbonate-Celite
Authors: 竹友, 一成
Authors (alternative): Taketomo, Kazushige
Issue Date: 28-Feb-1974
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.25, p.79-86; 1974
Abstract: In oder to investigate the influence of air on the catalytic activity of reduced silver carbonate-celite, the catalytic dehydrogenation of benzyl alcohol was studied with the catalyst adding air and without air at 210-310℃. As the reducing agent, H2, CH3OH and CO were used, respectively. The general aspects were summarized as follows : (1) The yield of benzaldehyde is larger in the presence of air than in the absence of air, especially at lower temperature. (2) In the presence of air, benzaldehyde decomposes to phenol and benzene, but in the absence of air, such a decomposition is not recognizable. (3) The production of phenol and benzene is not recognizable at lower temperature (210℃). (4) The production of phenol seems to be according to the following mechanism. / 還元銀セライトによるベンジルアルコールの脱水素反応を210・》510℃で試み次の結果を得た。(1)還元剤(水素,メタノール,一酸化炭素)の反応に及ぼす影響は大きくない。(2)炭酸銀セライトは調製後,約12ヵ月以上使用可能である。(3)ベンズアルデヒドの生成は,空気存在下の反応,特に低温(210℃)の反応で多くなる。(4)空気存在下の反応では,ベンズァルデヒドがフェノールおよびベンゼンに酸化分解される。しかし,この酸化分解は低温(210℃)の反応では認められない。(5)この酸化分解は,他の芳香族アルデヒド(P一トルアルデヒド)でも認められるが,芳香族ケトン(アセトフェノン)では認められない。(6)フェノール生成の機構は,Baeyer-Villiger反応のそれに似た側面があるらしい。
URI: http://hdl.handle.net/10069/32967
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 25

Citable URI : http://hdl.handle.net/10069/32967

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