高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (2): 259.

• 研究论文 • 上一篇    下一篇

微孔树脂镶嵌超细α-Fe2O3催化剂的制备、表征及其在苯酚H2O2羟化制备苯二酚反应中的应用

刘庆生1, 于剑锋1, 叶秋实2, 傅颖寰1, 许宁1, 吴通好1   

  1. 1. 吉林大学化学系催化研究室, 长春 130023;
    2. 吉林化工集团公司研究院, 吉林 132021
  • 收稿日期:2000-05-31 出版日期:2002-02-24 发布日期:2002-02-24
  • 通讯作者: 于剑锋(1959年出生),男,博士,副教授,从事多相催化研究.E-mail:jianfengyu@263.net E-mail:jianfengyu@263.net
  • 基金资助:

    国家自然科学基金(批准号:29773016)资助

Preparation and Characterization of Nanoscales α-Fe2O3/Microporous resin Catalyst and the Application in Hydroxylation of Phenol with H2O2 to Dihydroxybenzene

LIU Qing-Sheng1, YU Jiang-Feng1, YE Qiu-Shi2, FU Ying-Huan1, XU Ning1, WU Tong-Hao1   

  1. 1. Department of Chemistry, Jilin University, Changchun 130023, China;
    2. Institute of Jilin Chemical Industrial Company, Jilin 132021, China
  • Received:2000-05-31 Online:2002-02-24 Published:2002-02-24

摘要: 用离子交换方法制备了α-Fe2O3/微孔树脂催化剂.XRD,TEM和Mössbauer谱测试结果表明,制得的α-Fe2O3粒子尺寸非常细小,其粒径至少在5nm以下.该催化剂在苯酚H2O2羟化制备苯二酚反应中表现出了良好的催化活性,在n(苯酚)/n(H2O2)=3条件下,苯酚的有效转化率可达到22.4%,产物中邻苯二酚和对苯二酚的物质的量比接近1.4:1,反应放大3000倍后羟化活性及产物的选择性基本不变.与化学沉淀法制得的纳米α-Fe2O3羟化活性比较认为,造成二者催化活性不同的主要原因是α-Fe2O3的粒径发生了变化

关键词: &alpha, -Fe2O3/微孔树脂, 苯酚, 过氧化氢羟化, 苯二酚

Abstract: The nanoscales α-Fe2O3 /microporous resin catalyst was prepared by the ion exchange method and characterized by means of X-ray diffraction(XRD), transmission electron microscopy(TEM) and Mssbauer spectroscopy. The uses of these techniques make it possible to perform an estimation of the size of the iron oxide crystallites on microporous resin. The size of the crystallites has been found to be smaller than5 nm. The catalyst prepared exhibited a very good catalytic activity on the hydroxylation of phenol with H2O2 to dihydroxybenzene. The effect conversion of phenol reached 22.4% when phenol/H2O2(molar ratio) is 3 and the ratio of catechol and hydroquinone is about 1.4 in the products. The results didn't change when the reaction was magnified to 3000 times. Furthermore, compared α-Fe2O3 /microporous resin with α-Fe2O3 prepared from chemical precipitation, it was thought that the reason of different hydroxylation activity of phenol between the two kinds of catalysts was the size of particles in nature.

Key words: α-Fe2O3/microporous resin, Phenol, Hydroxylation with H2O2, Dihydroxybenzene

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