Method for preparing levoglucose ketone by catalytic pyrolysis of biomass

A technology of levoglucosone, catalytic pyrolysis, applied in the field of organic matter preparation, to achieve the effects of reducing corrosion and pollution, lowering temperature, and stable and safe process conditions

Inactive Publication Date: 2014-01-22
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, different catalysts have different problems in the process of use, so the development of new catalysts is still an important problem to be solved in the preparation of L-glucosone by selective pyrolysis of biomass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of Zinc Chloride Sludge Carbon:

[0020] (1) Take 100g of pulverized and dried oxidation ditch sludge, keep it at 500°C for 10 hours under normal pressure and nitrogen atmosphere, and obtain sludge charcoal after cooling;

[0021] (2) Take 20g of the sludge charcoal obtained in step (1) and 3g of zinc chloride mechanically, and then reflux in 500ml of ethanol system at 100°C for 1.5 hours, filter and dry at 80°C to obtain zinc chloride sludge charcoal.

[0022] Preparation of L-glucosone:

[0023] (1) Take 1 g of the above-mentioned zinc chloride sludge charcoal as a catalyst, use poplar bark as a raw material, and mechanically mix according to the mass ratio of poplar bark and catalyst at 3:1 to obtain a mixture;

[0024] (2) The mixture obtained in step (1) was pyrolyzed at 300° C. for 12 minutes under a nitrogen atmosphere to obtain a liquid product rich in L-glucosone.

[0025] The content of L-glucosone in the above-mentioned liquid product was analy...

Embodiment 2

[0027] Preparation of L-glucosone:

[0028] (1) Take 1 g of zinc chloride sludge charcoal prepared in Example 1 as a catalyst, and use commercial microcrystalline cellulose as a raw material, and mix the two mechanically. The mass ratio of commercial microcrystalline cellulose and catalyst is 5:1 , to get a mixture;

[0029] (2) The mixture obtained in step (1) was pyrolyzed at 380° C. for 15 minutes under a nitrogen atmosphere to obtain a liquid product rich in L-glucosone.

[0030] The content of L-glucosone in the liquid product was analyzed by gas chromatography, and the calculated yield of L-glucosone was 16.8%.

Embodiment 3

[0032] Preparation of Zinc Chloride Sludge Carbon:

[0033] (1) Take 100g of pulverized and dried oxidation ditch sludge, keep it at 350°C for 6 hours under normal pressure and nitrogen atmosphere, and obtain sludge charcoal after cooling;

[0034] (2) Take 20g of the sludge charcoal obtained in step (1) and 8g of zinc chloride and mechanically mix them, reflux in 500ml of ethanol system at 100°C for 2.5 hours, filter and dry at 80°C to obtain zinc chloride sludge charcoal.

[0035] Preparation of L-glucosone:

[0036] (1) Take 1 g of the above-mentioned zinc chloride sludge charcoal as a catalyst, use commercial microcrystalline cellulose as a raw material, and mechanically mix according to the mass ratio of poplar bark and catalyst at 8:1 to obtain a mixture;

[0037] (2) The mixture obtained in step (1) was pyrolyzed at 350° C. for 10 minutes under a nitrogen atmosphere to obtain a liquid product.

[0038] The content of L-glucosone in the above-mentioned liquid product ...

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Abstract

The invention relates to the field of preparation of organic matters, and in particular relates to a method for preparing levoglucose ketone by catalytic pyrolysis of a biomass. The method comprises the following steps: by taking zinc chloride sludge carbon as a catalyst, carrying out pyrolysis at 270-400 DEG C under an anaerobic condition by mixing the catalyst with the biomass mechanically; and collecting a condensed liquid to obtain a liquid product rich in levoglucose ketone. According to the method provided by the invention, the catalyst and the biomass raw materials are low in price, easily available and free from corrosion to pyrolysis equipment, so that the production cost is relatively lower. In addition, the zinc chloride sludge catalyst is stable in performance and can be recycled for times.

Description

technical field [0001] The method relates to the field of organic matter preparation, in particular to a method for preparing L-glucosone by catalyzing and pyrolyzing biomass. Background technique [0002] Biomass, especially lignocellulosic biomass, is mainly composed of cellulose, hemicellulose and lignin, in which cellulose is a macromolecular polymer composed of glucose with β-1,4 glycosidic bonds. Cellulose exists widely in nature, accounting for more than 35% to 50% of biomass content. 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 energy. Selective catalytic pyrolysis is the directed pyrolysis of biomass with the addition of a catalyst to increase the yield of one or several products. [0003] Levoglucosone can be obtained by catalytic pyrolysis of cellulose and related carbohydrates, and it can be widely used as a raw material for the syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/10C07H1/00
Inventor 卫新来俞志敏金杰吴克王磊王文奎
Owner HEFEI UNIV
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