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Investigation was conducted on potassium supported by rice husk silica (K/RHS) as basic catalysts for dibenzylideneacetone (DBA) production. The catalysts were prepared by an impregnation method of K2CO3 solution (10–30 wt.%) onto rice husk silica as support and calcined at 700 ℃. The physicochemical and morphological characterization of the K/RHS catalyst were performed using X-ray diffraction, N2 adsorption–desorption analysis and Fourier transform infrared spectroscopy and Scanning electron microscopy. The results of such analysis revealed that the catalyst obtained was associated with strong basicity. The aldol condensation reaction of acetone with benzaldehyde was studied using acetone: benzaldehyde molar ratio of 1:2, catalyst loading of 1 wt% at 80 ℃ for 1 h. The K/RHS exhibited the yield of DBA as 75%.

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An Efficient Solid Base Catalyst from Potassium Supported Rice Husk Silica for Green Synthesis of Dibenzylideneacetone

  • 会议论文

  • 发表日期：

    2025年

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  • Pimmada Hovanotayan,
  • Asadath Duangkum,
  • Kanhathai Kittiwan,
  • Thanaruepan Boonma,
  • Jidapa Pimthong,
  • Sakdinun Nuntang

摘要

Investigation was conducted on potassium supported by rice husk silica (K/RHS) as basic catalysts for dibenzylideneacetone (DBA) production. The catalysts were prepared by an impregnation method of K2CO3 solution (10–30 wt.%) onto rice husk silica as support and calcined at 700 ℃. The physicochemical and morphological characterization of the K/RHS catalyst were performed using X-ray diffraction, N2 adsorption–desorption analysis and Fourier transform infrared spectroscopy and Scanning electron microscopy. The results of such analysis revealed that the catalyst obtained was associated with strong basicity. The aldol condensation reaction of acetone with benzaldehyde was studied using acetone: benzaldehyde molar ratio of 1:2, catalyst loading of 1 wt% at 80 ℃ for 1 h. The K/RHS exhibited the yield of DBA as 75%.