Preparation method of hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst

Abstract

The invention relates to a preparation method of a hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst, and belongs to the technical field of environment functional material preparation. According to the preparation method, alkali-functionalized hydrophobic nano particles (S-NH2) and span80 are taken as the emulsifier to prepare stable pickering high internal phase emulsion, wherein the water phase comprises deionized water and potassium sulfate, the oil phase comprises divinyl benzene, 1-hexene, trihydroxymethyl propane trimethyl acrylate (TMPTMA), and 2,2'-azodiisobutyronitrile (AIBN), then through emulsion polymerization and sulfonation, the hydrophobic hierarchical pore solid acid-alkali bifunctional catalyst (PAPCs) is obtained, and the catalytic effect of the catalyst can be observed in the one-step conversion of cellulose to prepare 5-hydroxymethyl furfural.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic multi-level porous solid acid-base bifunctional catalyst, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] As people are worried about the status quo of global warming and the reduction of non-renewable fossil material reserves year by year, the development of clean energy and renewable resources such as chemical raw materials has been paid more and more attention; the abundant renewable biomass energy mainly comes from plant Photosynthesis, and it can be used as an organic compound to produce energy and sustainable sources, so it has the potential to replace fossil fuels; in many applications, use cellulose or non-edible components in biomass to efficiently convert to produce high-addition The application of this aspect of value chemicals is of great significance; among them, the platform chemical 5-hydroxymethylfurfura...

AI Technical Summary

Problems solved by technology

[0003] In recent years, researchers have been exploring how to use C 6 A high yield of 5-hydroxymethylfurfural can be obtained from a unit of carbohydrates. At the same time, it is understood that the conversion of cellulose to 5-hydroxymethylfurfural requires a typical three-step process; that is, acid-catalyzed degradation of cellulose to glucose, and alkali-catalyzed glucose isomerization dehydration to fructose and fructose to 5-hydroxymethylfurfural in an acidic environment; therefore, researchers rationally designed and synthesized solid acid catalysts based on the three-step process from cellulose to 5-hydroxymethylfurfural to catalyze cellulose Preparation of 5-hydroxyfurfural; for example, Wu et al. successfully synthesized macroporous mesoporous silica nanoparticles with dual functions of acid and base, and used them as catalysts to catalyze the preparation of 5-hydroxymethylfurfural from cellulose in ionic liquids. The base bifunctional solid catalyst can increase the yield of 5-hydroxymethylfurfural; during this period, Xiao Fengshou's research group successfully synthesized a series of solid acid and base mesoporous solid catalysts with different wettability, solid acid and solid base The catalyst is used to catalyze fructose and cellulose together to obtain 5-hydroxymethylfurfural in high yield; it can be seen that we have found that the hydrophobic multi-level porous solid catalyst with acid-base dual function can well improve the yield of 5-hydroxymethylfurfural. yield, but the preparation of hydrophobic porous solid catalysts with acid-base bifunctionality remains a serious challenge

[0004] So far, the combination of basic-functionalized nanoparticle-stabilized water-in-oil Pickeringau internal phase template method and sulfonation process to prepare hydrophobic porous solid catalysts with acid-base dual functions has not been reported.

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