| Autor: |
Rodikova, Yulia, Zhizhina, Elena |
| Zdroj: |
Reaction Kinetics, Mechanisms & Catalysis; Jun2020, Vol. 130 Issue 1, p403-415, 13p |
| Abstrakt: |
2,5-Diformylfuran (DFF) is an attractive and challenging compound that can be synthesized with good selectivity by the oxidation of bio-based 5‐hydroxymethylfurfural (5-HMF) using specific catalysts. Vanadium-containing heteropoly acids (PMoV HPAs) are highly active oxidation catalysts whose activity can be tuned by changing vanadium(V) (VV) content. This study reports the preparation of a number of PMoV HPAs with different VV amount and type of outer-sphere cation and investigating their catalytic performance in 5-HMF-to-DFF conversion. The characterization of synthesized HPAs by simple instrumental methods (pH-measurement, potentiometry, and titration analysis) and NMR revealed retaining Keggin structure and increasing oxidation potential with rising VV amount. The complete optimization of reaction conditions allowed one to reach a DFF yield of 92% using Co2H6P3Mo18V7O84 at 110 °C in water/MIBK for 90 min under atmospheric pressure. The described method of 5-HMF oxidation is based on using effective soft oxidants that can be easily recycled and reused at least five times without significant loss of catalytic activity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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