▎ 摘　　要

NOVELTY - Two-phase solvent system comprises an organic solvent phase and an aqueous solution phase, where the aqueous solution phase includes anions of VIIA elements, the aqueous phase has pH of 6.5-8.5, preferably 7-8 at room temperature of 25° C, and the organic solvent phase includes hydrophobic hydrogenation catalyst for production of 2,5-hexanedione from biomass. USE - The two-phase solvent system is useful for preparing 2,5-hexanedione by catalyzing and converting biomass by one-pot synthesis method (claimed). ADVANTAGE - The method solves can realize high-efficiency conversion of biomass without adding acid catalyst, provides high selectivity of 2,5-hexanedione, uses raw biomass as raw material, which is cheap, avoids the problems of corrosion of equipment, environmental pollution, and high treatment costs caused by acid, is simple and can efficiently convert biomass. The prepared 2,5-hexanedione product has very high selectivity, very good reaction system cycle stability, and good industrial application prospect. The two-phase solvent system provides catalytic conversion of biomass in one pot manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing 2,5-hexanedione by one-pot catalytic conversion of biomass, comprising contacting and reacting raw material with hydrogenation catalyst in the two-phase solvent system using hydrogen as hydrogen source to obtain 2,5-hexanedione.