Method for preparing 5-hydroxymethyl furfural from phosphorylation composite oxide catalysis biomass

Abstract

The invention relates to a method for preparing 5-hydroxymethyl furfural from phosphorylation composite oxide catalysis biomass. The method comprises the following steps: 1) dissolving or dispersing abiomass raw material into water so as to obtain a water solution or a suspension; 2) performing a reaction with sodium chloride and a catalysis and extraction solvent; 3) after the reaction is completed, performing cooling separation on a catalyst, and separating the liquid by using a separation funnel, thereby obtaining a product. According to the method, a phosphorylation composite oxide solidacid is adopted as the catalyst, the acidity of the catalyst is adjusted by adjusting the ratio of the addition amount of phosphoric acid to a Ti / Si component, the catalysis performance of glucose andbiomass in preparing HMF through dehydration preparation is optimized, the problem of separating the catalyst from a product is effectively solved, repeated use is facilitated, the production cost isreduced, and the problem of environment pollution is reduced. Meanwhile, compared with a preparation method of an ionic liquid system, the double-phase system preparation method provided by the invention has an approximate yield of the HMF.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a preparation method of 5-hydroxymethylfurfural. Background technique [0002] 5-Hydroxymethylfurfural (HMF) is a versatile platform compound, which contains an aldehyde group and a hydroxymethyl group, and can be used for synthesis through oxidation, hydrogenation, esterification, halogenation, polymerization, hydrolysis and other chemical reactions A series of important chemicals and new polymer materials, including resins, pharmaceuticals, fuels, bulk chemicals and other high value-added products. [0003] At present, many preparation methods of HMF are still mainly in the laboratory research stage, and industrialization has not been successfully reported. Among them, when fructose was used as the substrate, the yield was higher. Compared with fructose, glucose has more extensive sources and is cheaper, but the yield is relatively low, and the yield of preparation from soli...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: high viscosity of ionic liquid, high price, low amount of fructose in nature, high price, and the extensive use of inorganic acids such as hydrochloric acid and sulfuric acid will seriously corrode equipment, and it is not easy for industrial production

Zhao Haibo and his research group (Science, 2007, 316, 1597) used ionic liquid as a reaction solvent and chromium dichloride as a catalyst to effectively catalyze the degradation of glucose into HMF, but this method also used expensive ionic liquid as a Reaction solvent, while also using the chloride of toxic metal chromium as catalyst

Later, Binder, J.B and their collaborators (Science, 2009, 131, 1979) used organic solvents (acetone or dimethyl sulfoxide or dimethylacetamide) to prepare HMF, but these organic solvents were miscible with water, and the product separation There are problems with solvent recovery such as high energy consumption

For catalysts, the use of large doses of inorganic acids (hydrochloric acid, sulfuric acid, etc.) and metal chlorides will cause serious corrosion to equipment, and there are also problems with the recycling of catalysts, etc.

The preparation method of the metal oxide utilized in the Chinese patent CN 104250237 B adopts a direct impregnation method for the oxide, which will cause the catalyst to locally produce a strong acid center and coke in the reaction process to produce solid by-products to block the catalyst pores; the substrate of the reaction is Fructose, the source is scarce, the price is high; the reaction system is a single-phase system of high-boiling organic solvents, and the separation of products is relatively difficult

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