- A highly active Ni/ZSM-5 catalyst for complete hydrogenation of polymethylbenzenes
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Amazing the crowd: A highly dispersive supported nickel catalyst is prepared by in situ decomposition of Ni(CO)4 over ZSM-5 zeolite. The catalyst displays an amazing activity for complete hydrogenation of polymethylbenzenes which are extremely
- Qi, Shi-Chao,Wei, Xian-Yong,Zong, Zhi-Min,Hayashi, Jun-Ichiro,Yuan, Xin-Hua,Sun, Lin-Bing
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p. 3543 - 3547
(2014/01/06)
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- Efficient and Practical Arene Hydrogenation by Heterogeneous Catalysts under Mild Conditions
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An efficient and practical arene hydrogenation procedure based on the use of heterogeneous platinum group catalysts has been developed. Rh/C is the most effective catalyst for the hydrogenation of the aromatic ring, which can be conducted in iPrOH under neutral conditions and at ordinary to medium H 2 pressures (10 atm). A variety of arenes such as alkylbenzenes, benzoic acids, pyridines, furans, are hydrogenated to the corresponding cyclohexyl and heterocyclic compounds in good to excellet yields. The use of Ru/C, less expensive than Rh/C, affords an effective and practical method for the hydrogenation of arenes including phenols. Both catalysts can be reused several times after simple filtration without any significant loss of catalytic activity.
- Maegawa, Tomohiro,Akashi, Akira,Yaguchi, Kiichiro,Iwasaki, Yohei,Shigetsura, Masahiro,Monguchi, Yasunari,Sajiki, Hironao
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experimental part
p. 6953 - 6963
(2010/02/28)
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- Preferential catalytic hydrogenation of aromatic compounds versus ketones with a palladium substituted polyoxometalate as pre-catalyst
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A palladium-substituted polyoxometalate having a Keggin structure, supported on γ-alumina or active carbon, was used as a catalyst precursor for catalytic hydrogenation. The catalyst system enabled fast hydrogenation of arenes at 30 bar H2 and 230°C. Most interesting was the finding that arenes could be selectively reduced in the presence of distal ketone groups under similar conditions, 30 bar H2 and 200°C. For example, 1-phenyl-2-propanone yielded 1-cyclohexyl-2-propanone with no reduction of the ketone moiety. Additionally, aromatic compounds with vicinal (conjugated) ketone moieties underwent complete hydrogenation to saturated hydrocarbons and catalytic McMurry coupling was observed for aliphatic aldehydes.
- Kogan, Vladimir,Aizenshtat, Zeev,Neumann, Ronny
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p. 272 - 274
(2007/10/03)
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