Method for selectively preparing 5-hydroxymethylfurfural by catalyzing carbohydrates in water-ionic liquid mixed system

A technology of carbohydrates and hydroxymethylfurfural, which is applied in the direction of organic chemistry, can solve the problems of high price, unfavorable industrial production of 5-hydroxymethylfurfural, and increased production costs, and achieve low cost, reduction of levulinic acid and humin generation, the effect of reducing the dosage

Pending Publication Date: 2021-05-18
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

Although metal salts show superior catalytic performance in pure ionic liquid solvents, the high price of ionic liquids leads to a sharp increase in production costs, which is not conducive to the industrial production of 5-hydroxymethylfurfural

Method used

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  • Method for selectively preparing 5-hydroxymethylfurfural by catalyzing carbohydrates in water-ionic liquid mixed system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: A method for selectively preparing 5-hydroxymethylfurfural from carbohydrates in a water-ionic liquid mixed system

[0016] In the case of maintaining the same amount of fructose, ferric sulfate and deionized water as in Comparative Example 1, 15 wt% of 1-butyl-3-methylimidazolium chloride salt ionic liquid was added to the reaction system, and compared with Comparative Example 1 Under the same reaction conditions, the reaction solution containing the target product 5-hydroxymethylfurfural can be obtained. A small amount of the reaction solution is diluted and tested for detection. After quantitative analysis by high performance liquid chromatography, the obtained 5-hydroxymethylfurfural is calculated. The yield of furfural was 54.9%, the yield of by-product levulinic acid was 2.1%, and the yield of solid humin was 7.3%.

[0017] It can be seen from Example 1 and Comparative Example 1 that the present invention takes biomass-based carbohydrate as reactant, me...

Embodiment 2

[0020] Example 2: A method for selectively preparing 5-hydroxymethylfurfural from carbohydrates in a water-ionic liquid mixed system

[0021] In the case of maintaining the same amount of fructose, aluminum sulfate and deionized water as in Comparative Example 2, 15 wt% of 1-butyl-3-methylimidazolium chloride salt ionic liquid was added to the reaction system, and compared with Comparative Example 2 Under the same reaction conditions, the reaction solution containing the target product 5-hydroxymethylfurfural can be obtained. A small amount of the reaction solution is diluted and tested for detection. After quantitative analysis by high performance liquid chromatography, the obtained 5-hydroxymethylfurfural is calculated. The yield of furfural was 24.6%.

Embodiment 3

[0024] Example 3: A method for selectively preparing 5-hydroxymethylfurfural from carbohydrates in a water-ionic liquid mixed system

[0025] In the case of maintaining the same amount of fructose, copper sulfate and deionized water as in Comparative Example 3, 15 wt% of 1-butyl-3-methylimidazolium chloride salt ionic liquid was added to the reaction system, and compared with Comparative Example 3 Under the same reaction conditions, the reaction solution containing the target product 5-hydroxymethylfurfural can be obtained. A small amount of the reaction solution is diluted and tested for detection. After quantitative analysis by high performance liquid chromatography, the obtained 5-hydroxymethylfurfural is calculated. The yield of furfural was 43.0%.

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Abstract

The invention discloses a method for selectively preparing 5-hydroxymethylfurfural by catalyzing carbohydrates in a water-ionic liquid mixed system, a small amount of ionic liquid is added into a water-phase reaction solvent as an additive, so that the selectivity of the 5-hydroxymethylfurfural can be effectively improved, the generation of by-products and humin is reduced, meanwhile, the production cost can be reduced, and green and efficient conversion of biomass-based carbohydrates is realized.

Description

Technical field: [0001] The invention relates to the technical field of biomass energy utilization, in particular to a method for selectively preparing 5-hydroxymethylfurfural from carbohydrates in a water-ionic liquid mixed system. Background technique: [0002] 5-Hydroxymethylfurfural is considered as a key intermediate between biomass-based chemistry and petroleum-based industry because of its special molecular structure and active chemical properties, and it can be derived from a large number of high-value-added chemicals. It is an extremely important platform compound to realize the comprehensive utilization of biomass resources. In the prior art, the preparation of 5-hydroxymethylfurfural by chemical method mostly takes biomass-based carbohydrates (fructose, glucose, sucrose, cellobiose, starch and cellulose, etc.) as raw materials, and adopts homogeneous catalyst (inorganic acid , organic acids, metal salts, etc.) or heterogeneous catalysts (oxides, solid acids, mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 王晨光宋向波马隆龙陈伦刚朱妤婷刘琪英
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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