Preparation method of catalyst for preparing 5-hydroxymethylfurfural from cellulose

Abstract

A preparation method of a catalyst for preparing 5-hydroxymethylfurfural from cellulose is characterized in that a nickel doped biomass-based carbon compound is prepared from biomass sources such as glucose, the cellulose and bark as well as a nickel-containing compound as raw materials under hydrothermal conditions and is then carbonized at high temperature in an inert gas atmosphere, and a nickel doped carbon-based catalyst is obtained and has L-type and B-type double-acid active sites and developed pore structure. When the catalyst is applied to a catalytic degradation reaction of the cellulose in a hydrothermal environment with the hydrogen atmosphere, the product 5-hydroxymethylfurfural has higher yield, and recyclability of the catalyst is good. The operation process is mainly characterized in that the carbon-based catalyst prepared from the biomass sources is used for catalytic degradation of biomass, a high value-added platform chemical compound is obtained, the biomass sourceswhich are environmentally friendly, cheap and easily available are fully used, the catalysis reaction process is simple to operate, and yield is high.

Description

Technical field: [0001] The invention relates to the field of nano catalyst preparation, in particular to a method for preparing a catalyst for preparing 5-hydroxymethylfurfural from cellulose Background technique: [0002] 5-Hydroxymethylfurfural is a platform compound for the preparation of levulinic acid by degrading cellulose, an important intermediate for the synthesis of fine chemicals and furan polymers, and an effective active component for pharmaceuticals. 5-Hydroxymethylfurfural is considered to be the main intermediate in the fields of biomass chemical industry, petrochemical industry and organic chemistry. Therefore, it is of practical significance and value to seek an effective green path to prepare 5-Hydroxymethylfurfural from cellulose. [0003] When the reaction temperature using water as the medium is higher than 200 °C, the reactants undergo thermal degradation and hydrolysis at the same time, which is called "hydrothermal degradation". Studies have pointe...

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Problems solved by technology

However, the reaction steps are cumbersome, distillation and other processes are required, the selection of anions and cations for ionic liquid catalysts is more complicated, and organic reagents also bring a certain burden to the environment.

[0008] In summary, the traditional system for preparing 5-hydroxymethylfurfural mainly requires organic reagents to dissolve the raw materials, and the catalysts mostly use ionic liquid systems, containing various metal solid acid catalysts, etc., and strong acids and compounds are required in the preparation process. and other organic reagents, which are a burden on the environment. Although the conversion rate of raw materials is high, the selectivity of 5-hydroxymethylfurfural has certain limitations, and the product needs additional treatment for separation and purification.

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