化工进展 ›› 2016, Vol. 35 ›› Issue (04): 1113-1120.DOI: 10.16085/j.issn.1000-6613.2016.04.023

• 工业催化 • 上一篇    下一篇

水处理提高MOF-199催化苯羟基化反应性能

刘艳凤1,2, 张天永2, 吴武斌2, 李彬2, 周政1, 周浩浩1   

  1. 1. 海南大学材料与化工学院, 海南 海口 570228;
    2. 天津大学化工学院, 天津 300072
  • 收稿日期:2015-07-27 修回日期:2015-10-16 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: 李彬,副教授,从事工业催化和精细化工的研究.E-mail:libin@tju.edu.cn.
  • 作者简介:刘艳凤(1980-),女,实验师,从事工业催化的研究.E-mail:lyfvip@tju.edu.cn.
  • 基金资助:
    国家自然科学基金(21103121,21276187)及海南大学本科生创新创业课题项目.

Enhanced catalytic properties of MOF-199 with water treatment in the direct hydroxylation of benzene

LIU Yanfeng1,2, ZHANG Tianyong2, WU Wubin2, LI Bin2, ZHOU Zheng1, ZHOU Haohao1   

  1. 1. School of Materials and Chemical Engineering, Hainan University, Haikou 570228, Hainan, China;
    2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2015-07-27 Revised:2015-10-16 Online:2016-04-05 Published:2016-04-05

摘要: 以一水合乙酸铜和均苯三酸为原料,采用常温搅拌法合成金属有机框架化合物MOF-199,用XRD、IR、BET对其表征.将MOF-199用水处理后作为催化剂用于苯羟基化反应,考察了催化剂的用量、反应温度、反应时间、双氧水添加量对催化反应的影响.较优反应条件为:MOF-199(140mg,0.23mmol)、乙腈4mL、苯1.1mL、H2O23.3mL,在60℃的水浴中反应30min,所得苯的氧化物的产率为23.3%,苯酚的选择性为53.1%,转化频率(TOF值)为25.0h-1.水处理显著提高了MOF-199的催化活性,并形成了一种新的氧化模式,在一定程度上保护了MOF-199的框架结构.

关键词: 金属有机框架化合物, MOF-199, 水合物, 苯, 催化

Abstract: Cu(OAc)2·H2O was treated with benzenetricarboxylic acid under stirring to form metal-organic framework MOF-199, which was then characterized by XRD, IR and BET. The obtained MOF-199 was treated with water and then applied for the hydroxylation of benzene as catalyst. The effect factors of MOF-199 amount, reaction temperature, reaction time, H2O2 amount on the yield and the selectivity of benzene oxygenates were investigated. Results indicated suitable conditions for the preparation of benzene oxygenates, were that the water-treated MOF-199 (140mg, 0.23mmol), acetonitrile (4mL), benzene (1.1mL) and H2O2 (3.3mL) were mixed together, and then reacted for 30min at 60℃ in a water bath. The corresponding oxygenates had a yield of 23.3%, the selectivity to phenol of 53.1%, and the turnover frequency(TOF) was 25.0h-1. Pretreatment of MOF-199 catalyst with water significantly accelerated the catalytic oxidation of benzene to the corresponding oxygenates and preserved the metal-organic framework of MOF-199 due to the formation of a new reaction mode.

Key words: metal-organic framework, MOF-199, hydrate, benzene, catalysis

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