Two - Function Acid Catalyst Catalyzed Dehydration Of Glucose To Produce 5 - HMF

5-HMF is a kind of green chemical platform molecule, which can be obtained from the biomass. 5-HMF can be transformed to polymer, organic fuel and valuable chemicals through hydrogenation, esterification, oxidation and halogenation reaction process. Through fructose and glucose dehydration process in order to synthesis 5-HMF, but, glucose has attracted more and more attention because of lowcost and easy to get. In this process, glucose firstly passes through an isomerization process to fructose, and then followed by the dehydration process conversion to HMF. So searching the catalyst is very important.In this study, glucose were used as raw material, studied the glucose dehydration to synthesis 5-HMF and the different crystallite phase CePO4 catalyst with different acid distribution influence on 5-HMF yield. Reaction temperature, solvent dosage, reaction time and dosage of catalyst also have influence on 5-HMF yield. Discovered the reaction condition and the catalyst recycle lifetime. CePO4 catalysts with different crystallite structure have been synthesized. The experimental results indicate that the optimal reaction conditions were: glucose 200 mg, dosage of catalyst 50 mg, solvent dosage(DMSO) 10 ml. Under 160 oC reaction time 60 min, yield of 5-HMF achieved 61%. Using XRD, NH3-TPD,FT-IR,SEM,XPS to characterize the catalyst property.The H-Beta catalyst also has been synthesized for this reaction. The surface acid, reaction temperature, solvent dosage, reaction time and dosage of catalyst have been studied. The experimental results indicate that the optimal reaction conditions were: glucose 200 mg, dosage of catalyst 50 mg, solvent dosage(DMSO) 10 ml. Under 180 oC reaction time 5 h, yield of 5-HMF achieved 42.3%.