Affiliation:
1. Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 PR China
2. University of Chinese Academy of Sciences Beijing 100049 PR China.
Abstract
AbstractHerein, levulinate acid esters (LAEs) were efficiently synthesized from the α‐angelica lactone (α‐AL) esterification with trifloaluminate ionic liquids supported UIO‐67 MOF as Lewis acidic catalyst. A series of UIO‐67 catalysts with varied trifloaluminate ionic liquids loading were prepared via the post‐modification method and exhibited excellent catalytic activity for α‐AL esterification. Remarkable α‐AL conversion (100 %) and LAEs selectivity (>99 %) were achieved by UIO‐67 catalysts (0.2 mol %) with 12.4 %, trifloaluminate ionic liquids loading (UIO‐67‐TFA) at 70 °C and 90 min. The UIO‐67‐TFA catalyst can be reused at least 5 cycles without significant loss of catalytic activity. The UIO‐67‐TFA catalysts were fully characterized by XRD, SEM, XPS, TGA, IR, N2 physisorption, etc. The results indicated that the well‐distributed active trifloaluminate Lewis acid catalytic sites, high BET surface area, and good thermal stability could contribute to its excellent catalytic activity.
Funder
National Natural Science Foundation of China