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A method for preparing 5-hydroxymethylfurfural from carbohydrates

A carbohydrate, hydroxymethyl furfural technology, applied in the direction of organic chemistry, etc., can solve problems such as low yield of 5-hydroxymethyl furfural, and achieve increased economical and environmental protection, good economical and environmental protection, and a huge number of Effect

Active Publication Date: 2018-07-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using carbohydrates as raw materials, THF and water as solvents, CO 2 As a catalyst, 5-hydroxymethylfurfural is synthesized in an autoclave, but the yield of 5-hydroxymethylfurfural is low in this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix 3g fructose, 60mL water-isopropanol mixed solvent, water-isopropanol volume ratio 1:1, and mix evenly. The reaction conditions are: initial CO 2 The pressure is 2 MPa, the reaction temperature is 180° C., the reaction time is 150 min, and the stirring rate is 500 rpm. After the reaction was finished, it was air-cooled to room temperature, and the HMF content was measured by high-performance liquid chromatography and the yield was calculated. The yield of HMF was 59.1%.

Embodiment 2

[0027] Mix 3g fructose, 60mL water-isopropanol mixed solvent, water-isopropanol volume ratio 1:1, and mix evenly. The reaction conditions are: initial CO 2 The pressure is 2 MPa, the reaction temperature is 190° C., the reaction time is 120 min, and the stirring rate is 500 rpm. After the reaction was finished, it was air-cooled to room temperature, and the HMF content was measured by high-performance liquid chromatography and the yield was calculated, and the yield of HMF was 67.1%.

Embodiment 3

[0029] 3g fructose, 60mL water-ethanol mixed solvent, water-ethanol volume ratio is 1:1, mix evenly. The reaction conditions are: initial CO 2 The pressure is 2 MPa, the reaction temperature is 190° C., the reaction time is 180 min, and the stirring rate is 500 rpm. After the reaction was finished, it was air-cooled to room temperature, and the HMF content was measured by high-performance liquid chromatography and the yield was calculated, and the yield of HMF was 54.5%.

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PUM

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Abstract

The invention relates to a method for preparing 5-hydroxymethyl furfural from carbohydrate. The method includes the following steps that 1, water and alcohol are mixed to be uniform according to the volume ratio of 1:4 to 2:1, and a mixed solvent is obtained, wherein alcohol is monohydric alcohol; 2, the carbohydrate and the mixed solvent are put in a reaction still, CO2 is introduced into the reaction still to serve as a reaction catalyst, and a water-alcohol-CO2 mixed reaction system is obtained, wherein the initial filling pressure ranges from 0.1 MPa to 2.0 MPa; the concentration of the carbohydrate in the mixed solvent ranges from 30 g / L to 300 g / L, wherein the carbohydrate is monosaccharide or disaccharide or polysaccharide; 3, the mixed reaction system obtained in the step 2 carries out a reaction at the temperature of 150-220 DEG C, and 5-hydroxymethyl furfural is obtained, wherein the reaction time ranges from 15 min to 240 min. The reaction system is simple and efficient, has good economical efficiency and environment friendliness, and meanwhile can be suitable for preparing HMF from multiple types of carbohydrate at a high yield.

Description

technical field [0001] The invention relates to the field of preparation of 5-hydroxymethylfurfural, in particular to a method for preparing 5-hydroxymethylfurfural from carbohydrates. Background technique [0002] Biomass, as the only carbon-containing renewable resource, can be used to produce a variety of fine chemicals and fuels, which can gradually replace the current petroleum and coal resources, which is of great significance to China's energy security and environmental protection. 5-Hydroxymethylfurfural (5-hydroxymethylfurfural, HMF) is a high value-added platform compound that can be produced from biomass carbohydrates. A variety of industrial chemicals and new liquid fuels can be synthesized through HMF. Therefore, HMF can be produced efficiently It will be an important basis for the realization of biomass chemical industry. [0003] In the process of converting carbohydrates into HMF, although using water as a solvent is economical and environmentally friendly, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 王树荣林海周朱玲君周劲松高翔骆仲泱倪明江岑可法
Owner ZHEJIANG UNIV