高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

V(Ⅴ)促进SO2-4/ZrO2固体超强酸的制备及催化反应

郑明东1, 陈同云1, 胡克良2   

  1. 1. 安徽工业大学化学与化工学院， 马鞍山 243002;
    2. 中国科学技术大学结构分析中心, 合肥 230026
  • 收稿日期:2005-07-11 修回日期:1900-01-01 出版日期:2006-06-10 发布日期:2006-06-10
  • 通讯作者: 陈同云

Preparation of V(Ⅴ)Promoting SO2-4/ZrO2 Solid Superacid and Its Catalytic Activity

ZHENG Ming-Dong1, CHEN Tong-Yun1*, HU Ke-Liang2   

  1. 1. School of Chemistry & Chemical Engineering, Anhui University of Technology, Maanshan 243002, China;
    2. Structure Research Center, University of Science and Technology of China, Hefei 230026, China
  • Received:2005-07-11 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
  • Contact: CHEN Tong-Yun

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摘要： 用低温陈化的方法制得V(Ⅴ)促进型SO2-4/ZrO2固体超强酸(SZV), 用流动指示剂法测定其酸强度, 用IR， XRD和XPS进行结构表征, 并将制得的催化剂用于催化乙酸和丙三醇的酯化反应. 结果表明, 低温陈化样品比常温陈化有更强的酸性和更高的催化活性, IR谱图中SO键的伸缩振动峰显著增强, 在600-650 ℃的焙烧温度下, 低温陈化样品的晶体结构为ZrO2四方相, XPS图中Zr3d峰位出现较大的化学位移, 表明低温陈化使SZV样品具有较高的酸性.

关键词: 低温陈化, 固体超强酸, 制备, 酯化反应, 三醋酸甘油酯

Abstract: The V(Ⅴ)-promoting SO2-4/ZrO2 solid superacid samples were prepared by the method of ageing at a low temperature. The acidities of the samples were determined with flow indicator method, and the characterizations of the samples were performed by IR, XRD and XPS. The samples were used in the esterification of acetic acid and glycerol. The results show that the catalysts calcined at 600—650 ℃ and aged at a low temperature have a better performance comparing with other samples aged at ambient temperature, the flexible vibration peak of SO bond was strengthened remarkably in IR spectra, XRD patterns of aged samples at a low temperature and containing V(Ⅴ) additive indicate that metastable ZrO2 cubic crystals formed which were baked at 600—650 ℃. The peak position of Zr3d has a bigger chemical shift in XPS patterns.

Key words: Low-temperature ageing, Solid superacid, Preparation, Esterification, Triacetin

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