Synthesis of 3-buten-2-one from 4-hydroxy-2-butanone over anatase-TiO2 catalyst
Synthesis of 3-buten-2-one from 4-hydroxy-2-butanone over anatase-TiO2 catalyst
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DOI：
10.1016/j.catcom.2004.10.004
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发表时间：
2005
影响因子：
3.7
通讯作者：
Naoki Ichikawa;S. Sato;Ryōji Takahashi;T. Sodesawa
中科院分区：
文献类型：
--
作者：
Naoki Ichikawa;S. Sato;Ryōji Takahashi;T. Sodesawa
研究了 4-羟基-2-丁酮 (HB) 脱水为 3-丁烯-2-酮 (MVK)。锐钛矿-TiO2 对 HB 脱水表现出优异的活性，MVK 产率为 98.8 mol%。在 160 °C 时获得最高活性，并且锐钛矿型 TiO2 上很少观察到失活。 HB在240℃以上分解成丙酮，MVK选择性随着温度升高而降低。由于 MVK 和酸性位点之间的强烈相互作用引发聚合，催化剂的高酸性会导致失活。弱酸位点对于 HB 脱水为 MVK 是有效的。
Dehydration of 4-hydroxy-2-butanone (HB) to 3-buten-2-one (MVK) was investigated. Anatase-TiO2exhibited excellent activity for the dehydration of HB with 98.8 mol% MVK yield. The highest activity was obtained at 160 °C, and deactivation was rarely observed over anatase-TiO2. HB decomposes into propanone above 240 °C, and the MVK selectivity decreases with increasing temperature. High acidity of catalysts causes deactivation because of strong interaction between MVK and acid sites that induces polymerization. Weak acid sites are efficient for the dehydration of HB to MVK.