Dehydration of fructose and glucose to 5-hydroxymethylfurfural over Al-KCC-1 silica

摘要

In this research,the influence of several factors such as reaction time,catalyst weight,temperature and different solvents on dehydration reaction of fructose and glucose to 5-hydroxymethylfurfural (HMF) was surveyed.Nanosphere Al-KCC-1 silica with fibrous morphology was manufactured and used as proficient and recyclable catalyst for this reaction.SEM,TEM,BET,XRD,EDX,elemental mapping,ICP and FT-IRspectroscopy methods were applied for characterization of the Al-KCC-1 (molar ratio Si/Al =5,40) catalysts.162 ℃ and 1 h are the best conditions for the fructose dehydration.Under this situation HMF yield and selectivity are 92.9％ and 94.5％ respectively and fructose conversion is 98.4％.Also 170 ℃ and 2 h are the best conditions for the glucose dehydration.In this situation HMF yield and selectivity are 39.0％ and 39.9％ respectively and glucose conversion is 97.8％.