Method for preparing 5-alkoxy methyl furfural from carbohydrate

A technology of alkoxymethylfurfural and sugar substances, which is applied in the field of organic solid waste recycling, can solve the problems of low efficiency, many side reactions, and low selectivity, so as to reduce side reactions, improve conversion efficiency, reduce The effect of the separation and purification process

Pending Publication Date: 2019-06-28
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of many side reactions, low efficiency and low selectivity in the traditional technology of converting carbohydrates into 5-alkoxymethylfurfural, and provide a green and efficient method for converting carbohydrates into 5-alkoxymethylfurfural. The method for oxymethylfurfural is characterized in that comprising the following steps:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.1 g of glucose into a 15 mL reactor, add 1 g of ionic liquid 1-ethyl-3-methylimidazolium bromide brine and 2 mL of ethanol, respectively, add 2 mL of gasoline, and add 0.2 g of tin phosphate catalyst. Keep the stirring speed at 700 rpm, react at 140°C for 6 hours, separate the organic phase, and the yield of 5-ethoxymethylfurfural in the organic phase is 80%.

Embodiment 2

[0028] Add 0.1 g of cellulose hydrolyzate to a 15 mL reactor, add 1 g of ionic liquid 1-ethyl-3-methylimidazolium bromide brine and 2 mL of ethanol, respectively, add 2 mL of ethylene glycol dimethyl ether, and add 0.2 g titania supported tin catalyst. Keep the stirring speed at 700 rpm, react at 160°C for 8 hours, separate the organic phase, and the 5-ethoxymethylfurfural in the organic phase is 65%.

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Abstract

The invention belongs to the field of organic solid waste resourceful utilization, and discloses a method for preparing 5-alkoxy methyl furfural from carbohydrate. The method is characterized by including the following steps of establishing a two-phase system as the reaction medium by using ionic liquid with bromide ions or a deep-eutectic solvent with bromide ions as the reaction phase and usingan organic solvent as the extraction phase, adding a solid acid catalyst with strong Lewis acidity, a carbohydrate raw material, an alcohol raw material and the reaction medium to a reactor, and continuously converting the carbohydrate raw material into 5-alkoxy methyl furfural under the heating and stirring conditions. By means of the method, the Bronsted acid catalysis side reaction can be reduced, the reaction efficiency and selectivity are greatly improved, the conversion efficiency, green property and economy of fuel additives for converting the carbohydrate into 5-alkoxy methyl furfuralare improved, the subsequent separation and purification process can be reduced with liquid fuel and the like as the extraction phase, and products are directly integrated in liquid fuel products.

Description

technical field [0001] The invention belongs to the field of resource utilization of organic solid waste, and in particular relates to a method for preparing 5-alkoxymethylfurfural by using carbohydrates. Background technique [0002] At present, the utilization rate of biomass resources such as crop straws in my country is very low, and the annual economic losses and environmental pollution caused by straw burning and landfilling cannot be underestimated. Using renewable lignocellulosic biomass as basic raw materials to produce clean energy, chemicals and materials to replace petrochemical products is an effective way to alleviate the resource and energy crisis and control environmental pollution. Research work at home and abroad has demonstrated the potential of biorefining to replace petroleum refining. It is a very representative and promising transformation path to convert the sugar substance with the highest content in biomass to 5-ethoxymethylfurfural via the platfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/46
Inventor 候其东鞠美庭甄梅楠李婧男陈奕
Owner NANKAI UNIV
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