应用化学 ›› 2026, Vol. 43 ›› Issue (1): 96-107.DOI: 10.19894/j.issn.1000-0518.240278

• 研究论文 • 上一篇    下一篇

磷改性TiO2/SBA-15高效催化环己胺无溶剂氧化制备环己酮肟

邓骁鹏, 刘水林(), 李元鹏, 张善童   

  1. 湖南工学院化学与环境工程学院,衡阳 421002
  • 收稿日期:2024-08-28 接受日期:2025-01-20 出版日期:2026-01-01 发布日期:2026-01-26
  • 通讯作者: 刘水林
  • 基金资助:
    湖南省教育厅重点项目(22A0631);湖南省自然科学基金(2024JJ7127);湖南省大学生创新创业训练计划项目(S202411528205);湖南省一流本科专业建设点项目(DS2002)

Facile Synthesis of Cyclohexanone Oxime via Solvent-Free Catalytic Oxidation of Cyclohexylamine Using Phosphorus-Modified TiO2/SBA-15

Xiao-Peng DENG, Shui-Lin LIU(), Yuan-Peng LI, Shan-Tong ZHANG   

  1. School of Chemical and Environmental Engineering,Hunan Institute of Technology,Hengyang 421002,China
  • Received:2024-08-28 Accepted:2025-01-20 Published:2026-01-01 Online:2026-01-26
  • Contact: Shui-Lin LIU
  • About author:shuilin89@126.com
  • Supported by:
    the Research Foundation of Education Bureau in Hunan Province(22A0631);Natural Science Foundation in Hunan Province(2024JJ7127);Hunan Province College Students' Innovation and Entrepreneurship Training Program Project(S202411528205);Hunan Province First-Class Undergraduate Major Construction Project(DS2002)

摘要:

以钛酸四丁酯和磷酸为原料,采用液相水解法制备了高效的P-TiO2/SBA-15催化剂,通过X射线光电子能谱(XPS)、傅里叶变换红外光谱仪(FT-IR)、透射电子显微镜(TEM)、X射线衍射仪(XRD)和N2吸附-脱附比表面仪(BET)表征技术对催化剂的物化性质进行了表征,考察了其在环己胺无溶剂氧化制备环己酮肟反应中的催化性能,并对温度和压力等反应条件进行了系统优化,探讨了环己胺催化氧化双路径机制。结果表明,表面修饰的P-TiO2纳米颗粒在SBA-15上能实现高分散度的负载,有利于提高其催化效率,且当P-TiO2负载量为10%时催化效果最佳。在等活性组分负载量的前提下,10%P-TiO2/SBA-15复合物展现出显著的催化性能优势。相较于未负载的P-TiO2,其环己胺催化转化效率提升3.2倍至68.3%,目标产物环己酮肟的选择性同步增长15.3%。在标准化反应条件(90 ℃,1.0 MPa,4 h)下,使用0.3 g复合催化剂即可实现上述高效转化,印证了有序介孔载体对活性组分的分散强化效应,且P-TiO2/SBA-15表面的钛羟基是催化氧化环己胺的活性中心。该研究为环己酮肟的高效制备提供了一种新颖且绿色的路线,有一定的工业应用前景。

关键词: 环己酮肟, 无溶剂, 催化氧化, 环己胺, P-TiO2

Abstract:

A highly efficient P-TiO2/SBA-15catalyst using titanium butoxide and phosphoric as raw materials was synthesized by liquid phase hydrolysis method, and the physio-chemical properties of the catalysts were characterized by X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectroscopy (FT-IR), transmission electron microscope (TEM), X-ray powder diffraction (XRD), and N2 adsorption-desorption specific surface analyzer (BET) characterization techniques. The catalytic performance of P-TiO2/SBA-15 in the solvent-free oxidation of cyclohexylamine to cyclohexanone oxime was further studied. And the reaction conditions such as temperature and pressure were systematically optimized. Furthermore, a probable dual pathway mechanism of cyclohexylamine catalytic oxidation was also suggested. The results indicated that surface modified P-TiO2 nanoparticles could achieve high dispersion loading on SBA-15, which was beneficial for improving its catalytic efficiency. The best catalytic effect was achieved when the P-TiO2 loading was 10%. Under the premise of equal loading of active components, the 10% P-TiO2/SBA-15 composite exhibited significant catalytic performance advantages. Compared to the unloaded P-TiO2, the catalytic conversion efficiency of cyclohexylamine increased by 3.2 times to 68.3%, and the selectivity of the target product cyclohexanone oxime increased by 15.3% simultaneously. Under standardized reaction conditions (90 ℃, 1.0 MPa, 4 h), the efficient conversion could be achieved using 0.3 g of composite catalyst, confirming the dispersion strengthening effect of ordered mesoporous carriers on active components. In addition, the titanium hydroxyl groups on the surface of P-TiO2/SBA-15 were the active centers for catalytic oxidation of cyclohexylamine. The method provides a novel and green route for the highly efficient preparation of cyclohexanone oxime, and has certain prospects for industrial applications.

Key words: Cyclohexanone oxime, Solvent-free, Catalytic oxidation, Cyclohexylamine, P-TiO2

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