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<p>α, β-Unsaturated enones are significant intermediates in the synthesis of fragrances and pharmaceuticals, therefore, the development of efficient, environmentally friendly, and cost-effective synthetic methodologies holds considerable practical value. In this work, the composite metal oxide catalyst ZrO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> was synthesized by the co-precipitation method, and the crystal phase, acid-base sites, and pore structure of ZrO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> were studied using characterization methods such as TG, SEM, XRD, XPS, BET, and TPD. Under optimized reaction conditions (N<sub>2</sub> atmosphere, pressure: 0.1&#xa0;MPa, 310&#xa0;°C, 3&#xa0;h, 10&#xa0;g, mass space velocity: 2.27&#xa0;h<sup>− 1</sup>), the ZrO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> (Zr: Al = 3:7, co-precipitation pH = 9, 550&#xa0;°C annealing) catalyst exhibits remarkable catalytic performance—achieving up to 93.5% conversion of 4-Hydroxy-3-hexanone(HH) and 72.6% selectivity of 4-hexen-3-one (HO).</p> Graphical Abstract <p></p>

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Selective Conversion of 4-Hydroxy-3-hexanone to 4-Hexen-3-one Over γ-Al2O3 Based Composite Oxides

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Guangjie Hu,
  • Mingming Li,
  • Yiling Li,
  • Zhihui Cheng,
  • Xiao-Xuan Li,
  • Yi-Si Feng

摘要

α, β-Unsaturated enones are significant intermediates in the synthesis of fragrances and pharmaceuticals, therefore, the development of efficient, environmentally friendly, and cost-effective synthetic methodologies holds considerable practical value. In this work, the composite metal oxide catalyst ZrO2/Al2O3 was synthesized by the co-precipitation method, and the crystal phase, acid-base sites, and pore structure of ZrO2/Al2O3 were studied using characterization methods such as TG, SEM, XRD, XPS, BET, and TPD. Under optimized reaction conditions (N2 atmosphere, pressure: 0.1 MPa, 310 °C, 3 h, 10 g, mass space velocity: 2.27 h− 1), the ZrO2/Al2O3 (Zr: Al = 3:7, co-precipitation pH = 9, 550 °C annealing) catalyst exhibits remarkable catalytic performance—achieving up to 93.5% conversion of 4-Hydroxy-3-hexanone(HH) and 72.6% selectivity of 4-hexen-3-one (HO).

Graphical Abstract