Method for preparing 5-methylfurfural

A methyl furfural and fructosyl technology, applied in the field of organic matter preparation, can solve problems such as expensive catalyst, long reaction time, environmental pollution, etc., achieve the effects of reducing corrosiveness and pollution, low cost, and avoiding pretreatment steps

Inactive Publication Date: 2012-11-07
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for preparing 5-hydroxymethylfurfural in view of the disadvantage

Method used

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  • Method for preparing 5-methylfurfural
  • Method for preparing 5-methylfurfural

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Put 10g of inulin into 100ml of sulfuric acid with a concentration of 0.1M and impregnate it, then dry it and pulverize it. After the treatment, the inulin containing sulfuric acid is pyrolyzed at 350°C, and the liquid is collected to obtain Bio-oil of furfural. The obtained bio-oil containing 5-methylfurfural is extracted with common weakly polar organic solvents such as cyclohexane and ethyl acetate to obtain an organic phase and an aqueous phase, respectively. The organic phase is evaporated at 110°C under normal pressure to remove organic solvents and low-boiling components, and finally vacuum distillation controls the boiling point to 70-80°C to obtain the product 5-methylfurfural, which is then detected and analyzed by gas chromatography to obtain 5-methylfurfural. - The yield of methylfurfural is 18%.

Embodiment 2

[0041] Immerse 10g of inulin in 100ml of a mixed solution of sulfuric acid and boric acid with a concentration of 0.8M, and then dry and pulverize it. After the treatment, the inulin containing sulfuric acid and boric acid is pyrolyzed at 400°C, and the liquid is collected. That is, bio-oil containing 5-methylfurfural is obtained. The bio-oil product was separated and purified to obtain 5-methylfurfural (the method of separation and purification is as in Example 1), and then detected by gas chromatography, the yield was 10%.

Embodiment 3

[0043]Put 10g of silicon-aluminum nano-solid acid into 100ml of 1M sulfuric acid solution for immersion, filter and dry, load the sulfuric acid onto the solid acid, mix 2g of solid acid with 3g of inulin, and perform pyrolysis at 450°C to collect the liquid , to obtain bio-oil containing 5-methylfurfural. The bio-oil product was separated and purified to obtain 5-methylfurfural (the separation and purification means are as in Example 1), and the yield was 12% through gas chromatography detection.

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Abstract

The invention relates to a method for preparing 5-methylfurfural. The method for preparing the 5-methylfurfural includes the following steps: (1) fructose base biomass and acid catalyst are weighed in proportion; (2) the acid catalyst is used for processing the fructose base biomass; (3) and flash pyrolysis is performed on substances obtained in the step (2) so as to obtain the 5-methylfurfural. The fructose base biomass and the acid catalyst are common, easy to obtain and low in cost and pyrolysis temperature, a target product is high in yield, and a whole process has good economical efficiency. Compared with a production process for preparing the 5-methylfurfural at present, the method for preparing the 5-methylfurfural does not need severe conditions of solvent, high pressure and the like, a pyrolysis process is short in time consuming, the obtained product is easy to separate, and corrosivity and pollution of acid can be reduced effectively. The method for preparing the 5-methylfurfural is novel, economic and effective.

Description

technical field [0001] The invention relates to the field of organic matter preparation, in particular to a method for preparing 5-methylfurfural. Background technique [0002] With the increasing consumption and pollution of coal and oil resources around the world, people's need to find a renewable and clean energy source is becoming more and more urgent. Compared with fossil energy, biomass energy has the characteristics of wide distribution, large amount, no pollution and renewable. Biomass resources are the only sustainable source of organic carbon and the only renewable resource that can be converted into liquid fuels. Therefore, biomass has attracted more and more attention. [0003] Biomass pyrolysis, especially fast pyrolysis, can obtain high value-added liquid fuels and chemicals, and is considered to be one of the most effective ways to utilize biomass. Selective catalytic pyrolysis is the directional pyrolysis of biomass under the condition of adding a catalyst...

Claims

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Application Information

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IPC IPC(8): C07D307/46
Inventor 张颖徐禄江
Owner UNIV OF SCI & TECH OF CHINA
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