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A method for preparing furfural by co-pyrolysis

A technology of co-pyrolysis and furfural, applied in the direction of organic chemistry, can solve the problems of high cost, environmental pollution, and difficulty in catalyst preparation, and achieve the effect of high yield and good purity

Active Publication Date: 2022-02-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Catalytic pyrolysis of biomass avoids the problem of a large amount of waste liquid in the process of generating furfural products, but the current catalytic process using liquid or solid catalysts still faces environmental pollution and is difficult to recycle; catalysts are difficult to prepare and costly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 100g dry corncob (0.1-0.3mm in particle size) as raw material, first mechanically mix corncob and oxalic acid, the mass ratio of corncob and oxalic acid is 1:4; Pyrolysis, the heating time was 15 minutes, and the yield of the liquid product obtained was 56.9%; the content of furfural was analyzed by gas chromatography / mass spectrometry, and the moisture content of the liquid product was measured, and the yield of furfural was calculated to be 13.1%. , with a selectivity of 61.5%.

Embodiment 2

[0031] Take 100g of dry corn stalks (0.1-0.3 mm in particle size) as raw material, first mechanically mix corn stalks and oxalic acid, the mass ratio of corn stalks and oxalic acid is 1:4; Pyrolysis, heating time 15 minutes, the liquid product productive rate that obtains is 54.8%; Analyze wherein the content of furfural by gas chromatography / mass spectrometer, and measure the moisture content of liquid product, calculate that the productive rate of furfural is 12.3%, The selectivity was 57.1%.

Embodiment 3

[0033] Take 10g of dry commercial xylan (the ratio of xylose group is more than 90%) as raw material, first mix xylan and oxalic acid mechanically, the mass ratio of xylan and oxalic acid is 1:4; then put the mixture under nitrogen Rapid pyrolysis at 400°C under atmosphere, heating time 15 minutes, the yield of the liquid product obtained was 56.5%; the content of furfural was analyzed by gas chromatography / mass spectrometry, and the moisture content of the liquid product was measured, and the yield of furfural was calculated. The yield was 15.9%, and the selectivity was 68.4%.

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Abstract

The invention belongs to the field of biomass energy utilization, and in particular relates to a method for preparing furfural by co-pyrolysis. The present invention uses biomass rich in xylose units as the raw material for preparing furfural, mixes the raw material with oxalic acid, conducts rapid co-pyrolysis at 200-500°C under anaerobic conditions, and condenses the pyrolysis gas to room temperature. A liquid product rich in furfural is obtained. The oxalic acid involved in the method of the present invention is common and easy to obtain, and the price is low. In the co-pyrolysis process, it plays the role of catalyzing the decomposition of raw materials to form furfural. , so the co-pyrolysis process is green, efficient and pollution-free.

Description

technical field [0001] The invention belongs to the field of biomass energy utilization, and in particular relates to a method for preparing furfural by co-pyrolysis. Background technique [0002] Furfural, also known as α-furan formaldehyde, is an organic solvent with good selectivity, suitable solubility, and low toxicity. It is an important raw material for synthetic resins, nylon, coatings, etc. It is an important raw material for products, and the annual demand is very high. Biomass raw materials such as agricultural and forestry wastes are important raw materials for the preparation of furfural. At present, the industry mainly uses biomass raw materials to prepare furfural by hydrolysis. The acidic catalysts such as sulfuric acid used in this method will remain in the hydrolyzed solution. The catalyst is difficult to recover, and it is easy to cause water pollution. The above problems have become constraints to the development of the industry. Key factor. [0003] R...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/50C07D307/48
CPCC07D307/50C07D307/48
Inventor 陆强胡斌谢文銮范馨蕊刘吉杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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