▎ 摘　　要

NOVELTY - Continuously producing 5-hydroxymethylfurfural and 2,5-furandicarboxylic acid, comprises (1) dehydrating the fructosyl carbohydrate in the molecule in a two-liquid-phase reaction medium comprising polar organic solvent and quaternary ammonium halide aqueous solution, in the presence of a protonic acid catalyst to obtain a compound containing 5-hydroxymethylfurfural an organic phase; and (2) adding water to the organic phase containing 5-hydroxymethylfurfural obtained in step (1), in the presence of an oxidation catalyst and oxygen, and oxidizing 5-hydroxymethylfurfural to obtain 2,5 -furandicarboxylic acid, where the protonic acid catalyst is hydrochloric acid, sulfuric acid, sulfonic acid, phosphoric acid and/or sulfamic acid, preferably sulfamic acid, sulfuric acid and sulfonic acid; the oxidation catalyst comprises a support and an active metal component loaded on the support, and active metal component comprising a noble metal comprising ruthenium, platinum, palladium and/or gold. USE - The method or the system is useful for continuously producing 5-hydroxymethylfurfural and 2,5-furandicarboxylic acid. ADVANTAGE - The method is simple in process, low in waste gas, waste water and waste residue generation and emission, and is environmentally-friendly. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: producing 2,5-furandicarboxylic acid, comprises in a mixed solvent containing an organic solvent and water, subjecting 5-hydroxymethylfurfural to an oxidation reaction in the presence of an oxidation catalyst and oxygen to obtain 2,5-furandicarboxylic acid, where the organic solvent is an aprotic polar organic solvent miscible with water, and is preferably acetone, tetrahydrofuran, 1,4-dioxane, acetonitrile and/or dimethyl sulfoxide, and more preferably 1,4-dioxane, and the oxidation catalyst comprises a carrier and an active metal component supported on the carrier, where the carrier is a specific surface area of 1000-2000 m2/g, preferably 1000-1500 m2/g activated carbon; and a reaction system for continuously producing 5-hydroxymethylfurfural and 2,5-furandicarboxylic acid comprising a dehydration reaction unit, a phase separation unit and an oxidation reaction unit, where the dehydration reaction unit is provided with an inlet and an outlet, the phase separation unit is provided with an inlet, a aqueous phase outlet and an organic phase outlet, the oxidation reaction unit is provided with an inlet and an outlet, the outlet of the dehydration reaction unit is communicated with the inlet of the phase separation unit, the aqueous phase outlet of the phase separation unit is communicated with the inlet of the dehydration reaction unit, and the organic phase outlet of the phase separation unit is communicated with the inlet of the oxidation reaction unit, where the fructosyl carbohydrate is subjected to a dehydration reaction in the presence of a protonic acid catalyst in a two-liquid phase reaction medium containing a polar organic solvent and a halogenated quaternary ammonium salt aqueous solution in the dehydration reaction unit to obtain a two-phase stream containing 5-hydroxymethylfurfural, the two-phase stream is separated in the phase splitting unit to obtain an aqueous phase containing an acid catalyst and an organic phase containing 5-hydroxymethylfurfural, the aqueous phase containing the acid catalyst returns to the dehydration reaction unit, and the organic phase containing 5-hydroxymethylfurfural undergoes an oxidation reaction in the oxidation reaction unit to obtain a stream containing 2,5-furandicarboxylic acid, preferably, the dehydration reaction unit comprises a dehydration reactor consisting of a slurry bed, a bubbling bed, and/or a column tube reactor, preferably the oxidation reaction unit comprises an oxidation reactor e.g. a slurry bed, a fixed bed, and/or a bubbling bed, and preferably, the phase splitting unit comprises a phase separation tank. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the reaction system for continuously producing 5-hydroxymethylfurfural and 2,5-furandicarboxylic acid (Drawing includes non-English language text). 1Reaction system