Catalytic Properties of Mesoporous Silica (FSM-16) for Beckmann Rearrangement of Cyclohexanone Oxime in Gas Phase

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  • NAKAJIMA Tsuyoshi
    Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
  • NAKAJIMA Takao
    Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
  • MISHIMA Shozi
    Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University

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Other Title
  • シクロヘキサノンオキシムの気相Beckmann転位に対するメソポーラスシリカ(FSM-16)の触媒作用

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Description

Catalytic properties of FSM-16 (porous silica with the honeycomb structure of uniform mesopores)were investigated for Beckmann rearrangement of cyclohexanone oxime in gas phase at 523-623 K, and were compared with those of other typical solid acid catalysts. FSM-16 was found to be a long-life catalyst and exhibited higher conversion of the oxime than silica-alumina, H-ZSM-5, Na-ZSM-5, HXzeolite, and γ-alumina. Selectivity for ε-caprolactam of FSM-16 was 42-45%, which was lower than that of H-ZSM-5 (89%), silica-alumina (77%), and HX-zeolite (74%). The product composition given by FSM-16 was very similar to that by silica gel. FSM-16, which was impregnated with a solution of aluminum nitrate and then calcined at 823 K, exhibited a higher selectivity (54%) for ε-caprolactam than an original one. The activity of FSM-16 was remarkably decreased when the catalyst was calcined at 1073 K or above. However, the selectivity for e-caprolactam scarcely changed.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1997 (8), 565-569, 1997-08-10

    The Chemical Society of Japan

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