Transfer hydrogenation of levulinic acid under hydrothermal conditions catalyzed by sulfate as a temperature-switchable base
Transfer hydrogenation of levulinic acid under hydrothermal conditions catalyzed by sulfate as a temperature-switchable base
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DOI：
10.1039/b924648g
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发表时间：
2010-04
期刊：
影响因子：
9.8
通讯作者：
Daniel Kopetzki;M. Antonietti
中科院分区：
文献类型：
--
作者：
Daniel Kopetzki;M. Antonietti
结果表明，在水热条件下甲酸向乙酰丙酸的转移加氢反应可以用碱催化，也可以用简单的硫酸钠催化。盐加成的作用可以被澄清，并归因于在高温下的离解常数的变化。这使得硫酸盐在水热合成中成为温度可切换的碱。使用这种盐可以帮助防止浪费，因为反应后不需要中和。通过优化反应条件，γ-戊内酯（一种可持续的生物燃料分子）的产率可以提高到12%，其简单的通过毛细管流动反应器的停留时间小于20 min。
It is demonstrated that transfer hydrogenation from formic acid to levulinic acid under hydrothermal conditions can be catalyzed by bases, but also by simple sodium sulfate. The action of salt addition could be clarified and ascribed to the changing dissociation constants at high temperature. This renders sulfate a temperature-switchable base in hydrothermal syntheses. Using such salts can help in preventing waste, as neutralization after reaction is not necessary. By optimizing the reaction conditions, the yield of γ-valerolactone, a sustainable biofuel molecule, could be raised to 12% for a simple passage through a capillary flow reactor with a residence time of less than 20 min.