Effects of Solvents and Added Amines on the Selective Hydrogenation of 2-Naphthol over Urushibara Nickel and Cobalt Catalysts
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概要
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The selective hydrogenation of 2-naphthol (NL) was investigated with Ni (U-Ni-B, U-Ni-A, and R-Ni) and Co (U-Co-B, U-Co-A, and R-Co) catalysts in various solvents at elevated temperatures and pressure (50 kg/cm<SUP>2</SUP>). U-Ni-B and U-Ni-A exhibited a high selectivity for the formation of 1,2,3,4-tetrahydro-2-naphthol (ac-TL), expecially in alcoholic solvents, while the hydrogenation with R-Ni in Et<SUB>2</SUB>O, <I>i</I>-PrOH, and benzene solvents gave preferentially 5,6,7,8-tetrahydro-2-naphthol (ar-TL). The ar-TL formation over Ni catalysts decreased in the following order, irrespective of the catalysts. <I>i</I>-PrOH>EtOH>MeOH and Et<SUB>2</SUB>O> benzene. However, the selectivity over Co catalyst was influenced to a lesser extent by the solvents. The addition of amines promoted the hydrogenation of NL to ar-TL in the following order: prim-><I>sec</I>-><I>tert</I>-amine in EtOH over Ni and Co catalysts. In general, Ni catalysts are more susceptible to the effects of solvents and added amines than Co catalysts.
- 公益社団法人 日本化学会の論文
著者
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KAJITANI Masatsugu
Department of Chemistry, Faculty of Science and Technology, Sophia University
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Sugimori Akira
Department Of Chemistry Faculty Of Science And Technology Sophia University
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Watanabe Yoshio
Department Of Agricultural Chemistry Kyushu University
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Iimura Yutaka
Department of Chemistry, Faculty of Science and Technology, Sophia University
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Watanabe Yoshio
Department of Chemistry, Faculty of Science and Technology, Sophia University
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