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Method for catalyzing decomposition of fructose based on high-temperature high-pressure CO2 system

A high-temperature, high-pressure, CO2 technology, applied in the direction of organic chemistry, can solve the problems of limited CO2 catalytic activity and poor solubility, and achieve excellent catalytic efficiency, reduce the burden on the environment, and be easy to transport.

Active Publication Date: 2019-09-13
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction temperature for the preparation of 5-hydroxymethylfurfural due to the degradation of fructose is usually 120-200°C. Under this condition, CO 2 Poor solubility in aqueous solution, which greatly limits CO 2 Catalytic activity

Method used

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  • Method for catalyzing decomposition of fructose based on high-temperature high-pressure CO2 system
  • Method for catalyzing decomposition of fructose based on high-temperature high-pressure CO2 system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A high-temperature and high-pressure CO based 2 The method for systematically catalyzing the decomposition of fructose, comprising the following steps:

[0027] (1) 3 parts by weight of fructose, 1 part by weight of sodium carbonate-zinc glutarate mixture with a mass ratio of 2:1, and 100 parts by weight of water with a mass ratio of 5:7:88, 1,3-dimethyl The mixed solution that base-2-imidazolinone and dimethyl carbonate mix form is poured in the autoclave;

[0028] (2) After sealing and vacuuming to -0.1MPa, fill with 3MPa CO with a purity of 99.99% 2 Gas, heated to 120°C at a stirring speed of 300r / min, stopped the reaction after 40 minutes of reaction, and naturally cooled to room temperature, that is, a mixed solution of 5-hydroxymethylfurfural as the main product was obtained, and the fructose conversion rate and 5-Hydroxymethylfurfural yield.

Embodiment 2

[0030] A high-temperature and high-pressure CO based 2 The method for systematically catalyzing the decomposition of fructose, comprising the following steps:

[0031] (1) 5 parts by weight of fructose, 1.2 parts by weight of sodium carbonate-zinc glutarate mixture with a mass ratio of 2:1, and 100 parts by weight of water with a mass ratio of 5:7:88, 1,3-dimethyl The mixed solution that base-2-imidazolinone and dimethyl carbonate mix form is poured in the autoclave;

[0032] (2) After sealing and vacuuming to -0.1MPa, fill with 3.3MPa CO with a purity of 99.99% 2 Gas, heated to 130°C at a stirring speed of 300r / min, stopped the reaction after 80 minutes of reaction, and naturally cooled to room temperature, that is, a mixed solution with 5-hydroxymethylfurfural as the main product was obtained, and the fructose conversion rate and 5-Hydroxymethylfurfural yield.

Embodiment 3

[0034] A high-temperature and high-pressure CO based 2 The method for systematically catalyzing the decomposition of fructose, comprising the following steps:

[0035] (1) 10 parts by weight of fructose, 1.4 parts by weight of sodium carbonate-zinc glutarate mixture with a mass ratio of 2:1, and 100 parts by weight of water with a mass ratio of 5:7:88, 1,3-dimethyl The mixed solution that base-2-imidazolinone and dimethyl carbonate mix form is poured in the autoclave;

[0036] (2) After sealing and vacuuming to -0.1MPa, fill with 4MPa CO with a purity of 99.99% 2 Gas, heated to 150°C at a stirring speed of 300r / min, stopped the reaction after 100 minutes of reaction, and cooled naturally to room temperature, that is, a mixed solution of 5-hydroxymethylfurfural as the main product was obtained, and the fructose conversion rate and 5-Hydroxymethylfurfural yield.

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Abstract

The invention discloses a method for catalyzing the decomposition of fructose based on a high-temperature high-pressure CO2 system. According to the invention, cheap greenhouse gas CO2 is used as a main catalyst and can effectively promote the dehydration decomposition of fructose for preparation of 5-hydroxymethylfurfural in a solvent system consisting of high-temperature high-pressure water, 1,3-dimethyl-2-imidazolidinone and dimethyl carbonate. At the same time, a small amount of sodium carbonate-zinc glutarate is added as a catalyst aid to activate CO2 and increase the solubility of CO2 ina high-temperature solvent, so the yield of 5-hydroxymethylfurfural is greatly increased. The method of the invention has the advantages of low cost and environment friendliness, and provides reliable technical support for industrial conversion of fructose into 5-hydroxymethylfurfural.

Description

technical field [0001] The invention relates to a method for preparing 5-hydroxymethylfurfural by catalytic conversion of fructose, a renewable biomass compound, as a raw material, and belongs to the field of biomass-based chemicals. Background technique [0002] Coal, petroleum and other fossil resources are the cornerstone of the development of human society, providing reliable energy and material security for human beings. In recent years, with the rapid consumption of fossil energy and the accompanying environmental problems have become increasingly prominent, the development of new renewable clean energy has become increasingly urgent. Biomass is a sustainable resource with huge quantity, low price and biodegradable. Excavating renewable biomass resources to prepare new platform compounds is an important method to solve the current resource and energy crisis. Among them, sugar compounds, especially six-carbon sugars, as an important part of biomass resources, widely e...

Claims

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Application Information

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IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 黎演明龙思宇唐培朵杜芳黎杜奇石
Owner GUANGXI ACAD OF SCI
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