▎ 摘　　要

NOVELTY - 5-hydroxymethyl furfural and 5-tert-butoxymethyl furfural are prepared by catalytically reacting fructose in tert-butanol solvent in presence of proton acid catalyst. The proton acid catalyst is functional graphene catalyst comprising graphene as carrier and acid organic functional group having catalytic activity. USE - Method for preparing 5-hydroxymethyl furfural and 5-tert-butoxymethyl furfural (claimed). ADVANTAGE - The method has high activity and high yield of product. It avoids adverse factors of homogeneous catalyzing reaction, and it does not need toluene organic solvent. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of functional graphene catalyst comprising taking graphene and acid organic functional group-containing diazo compound at ratio of 1:10-90, dispersing in ethanol at diazo compound and ethanol ratio of 1 g:10-15 mL, stirring in ice water bath at 0-5 degrees C, adding 50 wt.% phosphoric acid solution at diazo compound and phosphoric acid solution ratio of 1 g:20-30 mL, reacting, filtering reaction product, washing with dilute hydrochloric acid solution, water washing to neutral and freeze-drying.