引用本文:
陈同云, 古绪鹏, 胡克良. SO42-/ZrO2-TiO2固体超强酸的制备[J]. 应用化学,
2002, 19(4): 377-380.
Citation: CHEN Tong Yun, GU Xu-Peng, HU Ke-Liang. Preparation of SO42-/ZrO2-TiO2 Solid Superacid[J]. Chinese Journal of Applied Chemistry, 2002, 19(4): 377-380.
Citation: CHEN Tong Yun, GU Xu-Peng, HU Ke-Liang. Preparation of SO42-/ZrO2-TiO2 Solid Superacid[J]. Chinese Journal of Applied Chemistry, 2002, 19(4): 377-380.
SO42-/ZrO2-TiO2固体超强酸的制备
摘要:
用低温陈化和添加稀土添加剂(硝酸镧)的方法制备了SO42-/ZrO2-TiO2固体超强酸,用IR和XRD对样品进行了表征.并通过在35℃条件下催化正丁烷异构化反应和流动指示剂法考察了Zr和Ti的摩尔比以及稀土添加剂对样品的酸性和催化活性的影响.IR和XRD谱图显示,该条件下制备的样品具有较多的超强酸位,其晶体为TiO2的锐钛矿晶相结构
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关键词:
- SO42-/ZrO2-TiO2固体超强酸
- / 硝酸镧
- / 制备
English
Preparation of SO42-/ZrO2-TiO2 Solid Superacid
Abstract:
A series of SO42-/ZrO2 TiO2 solid superacids(SZT) were prepared from a solution of ZnOCl2·8H2O and TiCl4, using ammonia water as a precipitant with or without addition of lanthanum nitrate, followed by aging at different temperature and calcining at 550℃ or 600℃. The acid strengths of SZT were evaluated by a flowing indicator method. The IR and XRD results showed that the superacid with molar ratio of Zr to Ti=0.5, aged at -15℃ and calcined at 550℃ with addition of La(NO3)3 has an anatase structure and more superacid active sites. Yield of 97.1% was achieved in catalytic esterification of acetic acid with n-butanol by using this catalyst.
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Key words:
- SO42-/ZrO2 TiO2 solid superacid
- / lanthanum nitrate
- / preparation
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