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Preparation of New Solid Bases Derived from Supported Metal Nitrates and Carbonates

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Abstract

A highly basic solid catalyst was obtained by dispersing nitrates or carbonates of alkali metals such as KNO3, CsCO3 over alumina and zirconia at the surface density of 10-15 × 1018 cations m-2 and heating them at 773-873 K in an inert atmosphere. The temperature is far below the decomposition temperatures of the nitrates and the carbonates. Based on the temperature-programmed decomposition (TPD) experiments, two types of decomposition process are suggested; a bulk decomposition and an anion decomposition. Generation of a strong basicity relates to the anion decomposition. The basic center may be composed of the oxygen anions liberated from the decomposition of the nitrate or carbonate anions that are dissociatively adsorbed on the support surface during the preparation. These catalysts effectively catalyzed the double bond isomerization of aliphatic hydrocarbons and bicyclic hydrocarbons at moderate temperature.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Ehime University, Matsuyama, 790-8577, Japan

    T. Yamaguchi, Y. Wang, M. Komatsu & M. Ookawa

Authors
  1. T. Yamaguchi
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  2. Y. Wang
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  3. M. Komatsu
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  4. M. Ookawa
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Yamaguchi, T., Wang, Y., Komatsu, M. et al. Preparation of New Solid Bases Derived from Supported Metal Nitrates and Carbonates. Catalysis Surveys from Asia 5, 81–89 (2002). https://doi.org/10.1023/A:1015108902323

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