Method for preparing 5-hydroxymethylfurfural by utilizing biomass sugar

Abstract

The invention belongs to the technical field of biomasses, particularly provides a method for preparing 5-hydroxymethylfurfural by utilizing biomass sugar. The method comprises the following steps of taking biomass sugar as a raw material, catalyzing the raw material under a water phase condition in acid, neutral or alkali buffering systems, and obtaining 5-hydroxymethylfurfural. The method provided by the invention is applicable for multiple kinds of raw material sugars, the wide of the initial concentration of the sugar is wide, the heating way is flexible, the temperature range is wide, and the buffering system is versatile; and moreover, the operation is simple and convenient, the equipment is simple, the energy is saved, the post-treatment is convenient, and the rate of conversion and selection are higher. 5-hydroxymethylfurfural is one of the important platform compounds capable of being obtained from biomasses to substitute the petrochemical products, can perform oxidation reaction, reduction reaction, halogenation reaction, polyreaction and the like, and also can be used as the intermediate for fine chemistry industry, pharmacy and furyl polymer, thereby having great economic value and wide application prospect. The method provided by the invention can realize large-scale industrialization production.

Description

technical field [0001] The invention belongs to the technical field of biomass, and in particular relates to a method for preparing 5-hydroxymethylfurfural. Background technique [0002] 5-Hydroxymethylfurfural is the direct product of dehydration of hexose, containing hydroxyl, aldehyde, furan ring, conjugated double bond, can undergo oxidation, reduction, halogenation, polymerization and other reactions, and can also be used as a fine chemical, pharmaceutical , an intermediate of furan-based polymers, has become a "star molecule" in the upsurge of biomass research in recent years, and is considered to be the most potential platform compound in the development of sustainable green energy. Especially in recent years, the rapid rise of oil prices, the efficient and green utilization of energy and resources have become increasingly popular, how to synthesize 5-hydroxymethylfurfural cheaply and efficiently on a large scale has attracted widespread attention. Most of the biomas...

AI Technical Summary

Problems solved by technology

Dimethyl sulfoxide is used as a solvent, and 5-hydroxymethylfurfural has high selectivity but is difficult to separate; water is the most environmentally friendly solvent, but 5-hydroxymethylfurfural is prone to hydration reaction in acidic aqueous solution, producing formic acid and acetylpropane Acid; two-phase mixed solvent can inhibit the further hydration of 5-hydroxymethylfurfural to a certain extent, but it is not completely green, and the post-treatment needs to remove the organic phase

However, the efficiency of glucose isomerization is very low, up to 50%

Images