中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (12): 1419-1423.DOI: 10.3724/SP.J.1095.2010.00039

• 研究论文 • 上一篇    下一篇

不同催化剂对苯酚H2O2羟基化反应的比较

徐明涛1,赵亮亮1,朱艳婧2,童莺1,陈庆渺1,杨柏林1,王康斌1,杨元法1*   

  1. (1.浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室 金华 321004;
    2.浙江仙琚制药股份有限公司 仙居)
  • 收稿日期:2010-01-18 修回日期:2010-04-11 出版日期:2010-12-10 发布日期:2010-12-10
  • 通讯作者: 杨元法,男，教授; E-mail:sky688@zjnu.cn; 研究方向：多相催化
  • 基金资助:
    浙江省大学生科研创新团队资助项目

Comparasion of Different Catalysts on Phenol Hydroxylation

XU Ming-Tao1, ZHAO Liang-Liang1, ZHU Yan-Jing2, TONG Ying1, CHEN Qing-Niao1, YANG Bai-Lin1, WANG Kang-Bin1, YANG Yuan-Fa1*   

  1. (1.Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua 321004;
    2.Zhejiang Xianju Pharmaceutical Co. Ltd.,Xianju)
  • Received:2010-01-18 Revised:2010-04-11 Published:2010-12-10 Online:2010-12-10
  • Contact: XU Ming-Tao

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摘要：

用苯酚、双氧水经羟基化反应合成邻、对苯二酚，在Fe2O3为催化剂的反应系统中，反应诱导期长，且反应剧烈；当以杂多酸盐或Fe/ZrO2为催化剂时，诱导期消失，且羟基化反应平稳。 反应的诱导期可能是由铁的氧化物转化为活性物种Fe3+和Fe2+的过程引起的；在杂多酸盐或Fe/ZrO2催化剂的反应体系中，羟基化反应可能发生在催化剂表面而使反应变得缓慢平稳，反应诱导期消失。

关键词: 苯酚羟基化, Fe2O3, 诱导期, 杂多酸盐, ·OH自由基

Abstract:

Fe2O3, heteropoly salt and Fe/ZrO2 exhibited high catalytic activity toward phenol hydroxylation using H2O2 as oxidant. A rapid hydroxylation of phenol was observed after an induction period in the hydroxylation of phenol catalyzed by Fe2O3; however, a slow hydroxylation of phenol was observed and the induction period disappeared in the same system catalyzed by heteropoly salt or Fe/ZrO2. The results suggest that, first, an induction period in hydroxylation of phenol is related to the formation of active species Fe3+ and Fe2+ from Fe2O3; and second, the slow hydroxylation is related to the surface catalysis reaction on heteropoly salt or Fe/ZrO2, leading to the disappearance of the induction period.

Key words: phenol hydroxylation, Fe2O3, induction period, heteropoly acidic salt, ·OH free radical

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