Preparation of 5-Hydroxymethylfurfural from Glucose Catalyzed by Phenol Deep Eutectic Solvent
In the face of the depletion of fossil fuel energy,the way to produce alternative fuels from renewable energy biomass has attracted great attentions.5-Hydroxymethylfurfural(5-HMF)is prepared in a two-phase system consisting of deep eutectic solvent(DES)and methyl isobutyl ketone(MIBK)with phenol as hydrogen bond donor,abundant glucose as raw material and chromium chloride Lewis acid as catalyst.The optimum reaction conditions are investigated by changing reaction parameters such as reaction temperature,reaction time and catalyst dosage.The experiment shows that the yield of 5-HMF is the highest,reaching 43.66％,when DES is selected as the solvent which uses phenol as the hydrogen bond donor.The mechanism of the interaction between phenol and Lewis acid is proposed,and the proton acid provided by the complex of phenol and chromium chlo-ride makes the high yield of 5-HMF.The cyclic catalytic experiments of DES and catalyst show that the stability can be maintained within two times of continuous catalysis.
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