化工进展 ›› 2025, Vol. 44 ›› Issue (10): 5764-5770.DOI: 10.16085/j.issn.1000-6613.2024-1281

• 工业催化 • 上一篇    

PCuMo11/MG-800多相催化硝基苯还原制苯胺

高永平(), 康家宁, 刘柏, 袁诗淇, 于泽广, 张志会, 高文秀()   

  1. 吉林化工学院化学与制药工程学院,吉林 吉林 132022
  • 收稿日期:2024-08-04 修回日期:2024-12-07 出版日期:2025-10-25 发布日期:2025-11-10
  • 通讯作者: 高文秀
  • 作者简介:高永平(1997—),女,硕士研究生,研究方向为催化化学。E-mail:2391446796@qq.com
  • 基金资助:
    吉林省自然科学基金(YDZJ202101ZYTS173);吉林省教育厅科研规划项目(JJKH20240303 KJ);吉林化工学院分析测试中心项目

Catalytic hydrogenation of nitrobenzene to aniline over heterogeneous catalyst PCuMo11/MG-800

GAO Yongping(), KANG Jianing, LIU Bai, YUAN Shiqi, YU Zeguang, ZHANG Zhihui, GAO Wenxiu()   

  1. School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, Jilin, China
  • Received:2024-08-04 Revised:2024-12-07 Online:2025-10-25 Published:2025-11-10
  • Contact: GAO Wenxiu

摘要:

苯胺作为一种重要的化学合成中间体,主要由硝基苯还原制得。开发活性高、选择性好且稳定的硝基苯还原制苯胺催化剂是十分必要的。本文以原位合成法制备氮掺杂碳材料MG-800,负载多金属氧酸盐PCuMo11,得到复合材料PCuMo11/MG-800。通过傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、透射电子显微镜(TEM)、N2吸附-脱附及X射线光电子能谱(XPS)等测试手段对复合材料进行表征。MG-800丰富的氮元素和高比表面积有助于PCuMo11的均匀分散;PCuMo11与MG-800的化学相互作用提高了催化剂的活性和稳定性。实验结果显示,含0.5mmol硝基苯的乙醇溶液中加入1.5mmol水合肼还原剂和10mg PCuMo11/MG-800催化剂,80℃反应20min,硝基苯转化率达100%,苯胺选择性大于99.9%,催化剂的转化率(TOF)为0.15mol/(g·h)。催化剂经过5次循环使用后仍具有良好的稳定性,苯胺的收率保持在99%,是一种高效、稳定、可循环使用的硝基苯加氢制苯胺多相催化剂。

关键词: 复合材料, 多相反应, 还原, 硝基苯, 催化剂

Abstract:

As an important intermediate, aniline is mainly produced by reduction of nitrobenzene and development of the catalysts with high activity, good selectivity and stability is essential. Nitrogen-doped carbon material MG-800 was prepared by in-situ synthesis, and then loaded with polyoxometallate PCuMo11 to obtain the composite material PCuMo11/MG-800. The composite material was characterized by FTIR, XRD, TEM, N2 adsorption-desorption, and XPS. The rich nitrogen content and high specific surface area of MG-800 contribute to the homogeneous dispersion of PCuMo11, and the chemical interaction between PCuMo11 and MG-800 promotes the activity and stability of the catalyst. The experimental results showed that the addition of 1.5mmol of hydrazine hydrate reductant and 10mg of PCuMo11/MG-800 catalyst to 0.5mmol of nitrobenzene in ethanol solution for 20min at 80℃ resulted in 100% nitrobenzene conversion, 99.9% aniline selectivity, and the turn over frequency (TOF) of the catalyst was 0.15mol/(g·h). The catalyst maintained good stability after 5 cycles, with the yield of aniline remaining at 99%. It is an efficient, stable and recyclable heterogeneous catalyst for the hydrogenation of nitrobenzene to aniline.

Key words: composites, multiphase reaction, reduction, nitrobenzene, catalyst

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