Preparation method and application of solid acid catalyst

Abstract

The invention discloses a preparation method and application of a solid acid catalyst. The preparation method of the solid acid catalyst comprises the following steps: (1) mixing a silicon source, an alkali source, a metallic compound and a template, and carrying out hydrothermal reaction to obtain a reaction product 1; (2) filtering the reaction product 1 to obtain a solid, and drying at 60-120 DEG C for 12-36 hours to obtain a reaction product 2; and (3) calcining the reaction product 2 at 500-600 DEG C for 3-10 hours to obtain the solid acid catalyst. The silicon source is selected from hydrophilic nano silicon oxide, sodium silicate and tetraethyl orthosilicate; the alkali source is selected from tetramethylammonium hydroxide, alkali metal hydroxide and ammonia water; the metallic compound is selected from tin tetrachloride, zirconium sulfate, sodium silicate, chromic nitrate, nickel nitrate and tetrabutyl titanate; and the template is cetyl trimethyl ammonium bromide. The solid acid catalyst disclosed by the invention can be used for preparing 5-hydroxymethylfurfural.

Description

technical field [0001] The invention relates to the field of mesoporous molecular sieve catalysts, in particular to a preparation method and application of a solid acid catalyst. Background technique [0002] 5-Hydroxymethylfurfural (or 5-Hydroxymethyl-2-furfuraldehyde, 5-HMF for short) is an important furyl compound. Because of its relatively active properties, it can be used as an intermediate for many chemicals. It is an important platform compound. It can be oxidized to obtain 2,5-diformylfuran, which can be used as a drug intermediate or polymer precursor and antibacterial agent; it can be catalyzed and oxidized to obtain an important platform compound 2,5-furandicarboxylic acid, which can be further transformed into other various compound; it can be catalytically reduced to obtain 2,5-dimethylfuran (DMF), a liquid fuel with a higher octane number and higher boiling point than ethanol; it can also be hydrolyzed to obtain the platform compound levulinic acid and the che...

AI Technical Summary

Problems solved by technology

James Dumesic, a professor at the University of Wisconsin-Madison in the United States, reported the synthesis process of HMF. Under the condition of 180°C, acid-catalyzed dehydration reaction was used to obtain HMF, and DMSO was used to suppress side reactions. Using this process, fructose was used as raw material to prepare 5-HMF. Reaching more than 85%, but the process conditions are harsh, the reaction temperature is high, and there is a problem of separation between the product and DMSO that cannot be solved, which is not conducive to large-scale preparation

Later research work (Zhao H, Holladay J E, Zhang Z, et al. Science, 2007, 316, 1597) found that in ionic liquid, CrCl 2 It can effectively convert fructose and glucose into HMF, but the Cr catalyst pollutes the environment and is not environmentally friendly

[0004] In short, the current HMF production process still has certain defects, which cannot meet the needs of industrial production.

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