Method for preparing 5-hydroxymethylfurfural from acidic iron liquids

A technology of acidic ionic liquid and hydroxymethylfurfural, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., can solve problems such as unsatisfactory effects, and reduce the activation energy of the reaction , shorten the reaction time, strong polar effect

Inactive Publication Date: 2011-09-28
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fang Minjun of Zhejiang University used the acidic ionic liquid [Ibmim] Br as the reaction solvent to prepare 5-hydroxymethylfurfural. After 7 hours of reaction, the yield of 5-hydroxymethylfurfural was only 47.5%, and the effect was not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 0.1g of fructose and dissolve in 1g of [BMim]TS preheated to 80°C, and react at 150r / min for 60min. After the reaction, stop stirring. After sampling, quickly take out the reactor and cool it with 0-20°C cold water. The product is a viscous colloidal liquid. Dilute the sample with ultrapure water and analyze the fructose and 5-hydroxymethylfurfural content by liquid chromatography. The conversion rate of fructose was 100%, and the yield of 5-hydroxymethylfurfural was 89.5%.

Embodiment 2

[0024] Weigh 0.1g of fructose and dissolve in 1g of [BPy]TSO preheated to 80°C, and react at 150r / min for 60min. After the reaction, stop stirring. After sampling, quickly take out the reactor and cool it with 0-20°C cold water. The product is a viscous colloidal liquid. Dilute the sample with ultrapure water and analyze the fructose and 5-hydroxymethylfurfural content by liquid chromatography. The conversion rate of fructose was 93%, and the yield of 5-hydroxymethylfurfural was 83.6%.

Embodiment 3

[0026] Weigh 0.1g of fructose and dissolve in 1g of [BMim]TS preheated to 70°C, and react at 150r / min for 60min. After the reaction, stop stirring. After sampling, quickly take out the reactor and cool it with 0-20°C cold water. The product is a viscous colloidal liquid. Dilute the sample with ultrapure water and analyze the fructose and 5-hydroxymethylfurfural content by liquid chromatography. The conversion rate of fructose was 100%, and the yield of 5-hydroxymethylfurfural was 71.8%.

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Abstract

The invention discloses a method for preparing 5-hydroxymethylfurfural from acidic iron liquids. The 5-hydroxymethylfurfural is prepared by catalyzing fructose by directly taking the acidic iron liquids, i.e., [BMim]TS and [BPy]TSO, as a solvent and a catalyst. When a reaction is carried out at the temperature of 80 DEG C and the speed of 150r / min for 30min, the conversion rate of the fructose can reach 100%, and the yield of the 5-hydroxymethylfurfural can reach 94.5%. The acidic iron liquids not only can dissolve the fructose and the 5-hydroxymethylfurfural under the action of static electricity, but also can generate hydrogen ions to be in bronsted acidity and can form a hydrogen bond with the fructose to activate a reaction bond, thereby lowering the reaction temperature and shortening the reaction time. The separation of the 5-hydroxymethylfurfural from an ionic liquid can be realized in a way of organic solvent extraction or distillation, the ionic liquid can be recovered, a volatile organic solvent is avoided being used in the reaction process and during later separation, and the pollution to the environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of renewable energy production, and in particular relates to a method for preparing 5-hydroxymethylfurfural by directly catalyzing fructose dehydration with an acidic ionic liquid. Background technique [0002] With the decrease of petroleum reserves and the increase of people's attention to the global greenhouse effect, renewable raw materials for energy and chemicals have become the main direction of future development. Abundant biomass resources are an effective option for the sustainable supply of fuels and chemicals in the future. Among many possible bio-based chemicals, 5-Hydroxymethylfurfural is a valuable intermediate substrate for fine chemicals, pharmaceuticals and furan polymer materials. It can be processed by Dials-Alder, alkylation, acylation, hydrogenation, A series of chemical reactions such as esterification, halogenation, polymerization, and oxidation produce a variety of high-value-added ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/50B01J31/02
Inventor 郭峰方真
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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